Tải bản đầy đủ

EDCS 8210 INSTRUCTION MANUAL v1 10 130313

EDCS-8000 SERIES OF POWER SYSTEM
INTEGRATED AUTOMATIC-EQUIPMENT

EDCS-8210 High-voltage Transmission
Line Protect Equipment

INSTRUCTION MANUAL
V1.10

Chongqing New Century Electrical Co., Ltd



VERSION ANNOUNCEMENT
Copyright: Chongqing New Century Electrical Co., Ltd.
This instruction is applicable to the protection program of the following version:
EDCS-82101 High-voltage transmission line Protect Equipment V1. **
EDCS-82102 High-voltage transmission line Protect Equipment V1.**
EDCS-82103 High-voltage transmission line Protect Equipment V1.**

UPDATING RECORD OF INSTRUCTION’S VERSION

NO.

Instruction

Summary

Modified Date

Version
1

V1.01

2

V1.10

Modify reclose setting range and distance
protect character diagram

2011-3-10

EDCS-82101 and EDCS-82102 add 4
stages directional overcurrent protection

2013-3-13

3
4
5
overcurrent protection
6
7
8
9
10

 The instruction and production may have a little change, please check the
practical production and the instruction‟s version.
 Technical support:023-68694458



Fax:023-68626689

 The first version prints in 10.2010.10
 More information please access http://www.cqnec.com.cn


NEW CENTURY RELAYS

EDCS-8210 HV Trans Line Protect Equipment Instruction Manual

IMPORTANT INSTRUCT
Thank you for purchased production made by Chongqing New
Century Electrical Co., Ltd. For safe, correct and effective usage of
these devices, please read the important information below.
 Please read the instruction carefully, and adjust, test or
manipulate under the instruction‟s prescript.
 To protect the device, do not insert or withdraw the module, do
not touch Chip and element when the power on.
 Please use dependable, high accuracy test instrument and
equipment for test and measure to device.
 If there is any abnormal or need repaired, please make contact
with us.
 Debugging Password: factory default setting is 8200, provided
for technical management personnel, such as the delay
protection personnel, station master, to set the operation value,
communication parameters, variable ratio, the print parameters
etc..
 Running Password: factory default setting is 0000, provided for
front-line staff to change value area, realize the soft platen on/off
and so on.


CONTENTS
PART ONE TECHNICAL INSTRUCTION ............................................... 1
1

SUMMARIZE .................................................................. 1

1.1

APPLICATION .................................................................. 1

1.2

CHARACTERISTIC ............................................................... 1

1.3

FUNCTION DEPLOYMENT ........................................................... 1

2

TECHNICAL PARAMETERS .................................................... 3

2.1

ENVIROMENTAL PARAMETER ........................................................ 3

2.2

RATED PARAMETERS .............................................................. 3

2.3

PERFORMANCE INDEX ............................................................. 3

2.4

COMMUNICATION INTERFACE ....................................................... 6

2.5

INSULATION PERFORMACE ......................................................... 6

2.6

ELECTROMAGNETIC COMPATIBILITY CHARACTERISTICS ................................. 7

2.7

MECHANICAL PROPERTIES ......................................................... 7

3

FUNCTION PRINCIPLE ........................................................ 8

3.1

FUNCTION PRINCIPLE ............................................................ 8

3.2

SELF-CHECKING PRINCIPLE ...................................................... 38

4

EDCS-82101 HIGH VOLTAGE LINE PROTECT EQUIPMENT ...................... 42

4.1 DEVICE SETTING ................................................................ 42
4.2

DEVICE HARDWARE .............................................................. 59

5

EDCS-82102 HIGH VOLTAGE LINE PROTECT EQUIPMENT ...................... 64

5.1

DEVICE VALUE ................................................................. 64

5.2

DEVICE HARDWARE .............................................................. 81

6

EDCS-82103 HIGH VOLTAGE PROTECTION EQUIPMENT ........................ 89

6.1

DEVICE SETTING ............................................................... 89

6.2

DEVICE HARDWARE ............................................................. 107

PART TWO INSTRUCTION FOR USE ................................................ 114
1

OPERATION INSTRUCTION .................................................. 114

1.1

THE KEYS .................................................................... 114

1.2

THE MUNU .................................................................... 114

2

DEVICE OPERATIONS ....................................................... 117

2.1

NORMAL OPERATIONAL MODE STATUS .............................................. 117

2.2 ABNORMAL INFORMATION DISPOSAL ................................................ 118
3

INSTALLATION INSTRUCTIONS .............................................. 121

3.1

BOX OPENING CHECK ........................................................... 121

3.2

INSTALLATION NOTICE ......................................................... 121

4

CIRCUIT DEBUG SYLLABUS ................................................. 122

4.1

TEST NOTICE ................................................................. 122

I


NEW CENTURY RELAYS

EDCS-8210 HV Trans Line Protect Equipment Instruction Manual

4.2

AC LOOP CHECK ............................................................... 122

4.3

INPUT CONTACT CHECK ......................................................... 122

4.4

OUTPUT CONTACT CHECK ........................................................ 123

4.5

FIBER CHANNEL CHECK ......................................................... 123

4.6

OPTICAL AND OPTICAL CONNECTION NOTICE ....................................... 124

4.7

UNIT TEST DEVICE ............................................................ 126

5

PRINT ACTION REPORT ..................................................... 131

6

TRANSPORTATION AND STORAGE ........................................... 131

7

APPENDIX.................................................................. 132

7.1

CHASSIS STRUCTURE ........................................................... 132

7.2

COMMUNICATION CONNECTION .................................................... 134

7.3

ORDER NOTICE ................................................................ 137

7.4

PROTECTION VALUE SETTING LIST ............................................... 137

II


NEW CENTURY RELAYS

EDCS-8210 HV Trans Line Protect Equipment Instruction Manual

PART ONE TECHNICAL INSTRUCTION
1

SUMMARIZE

1.1 APPLICATION
EDCS-8210 high-voltage transmission line protection device is implemented by a
high-performance microprocessor, suitable for 110kV voltage and below transmission
lines.

1.2 CHARACTERISTIC
1)

Installations display with large-screen LCD in all-English menu design, debugging
and running in a more humanity way.

2)

The way shows the events and set point with English characters instead of the way of
character.

3)

The core of CPU is 32 bit MPU, and FPGA field programmable gate array, large
capacity RAM and FLASH RAM. So the device has the strong ability of disposal data
and storage. The data can still be remembered in FLASH RAM after broken power.
The device can keep its state.

4)

Using the CAN net as the intercom network, the data message passes in and out
smoothly. Adopt dual Ethernet communication.

5)

Advanced protection principle provides sufficient basis for the rapid action and
reliability theory of the protection.

6)

The aluminum alloy DOS has strong immunity to electromagnetic interference,
impact, and adapts the badly electric environment well

7)

Record every element‟s action behavior and action‟s calculated values of the internal
part.

8)

The excellent function of self-inspection meets the requirements of examination and
repairing.

1.3 FUNCTION DEPLOYMENT
MODEL NUMBER

EDCS-82101

EDCS-82102

EDCS-82103

NAME

High-Voltage
Protection Device

High-Voltage

High-Voltage

Protection Device

Protection Device

IEEE CODE

PROTECTION
FUNCTION
Fiber Split-phase

87L

Current differential



Protection

1


NEW CENTURY RELAYS

EDCS-8210 HV Trans Line Protect Equipment Instruction Manual

Fiber Zero Sequence
87LN



Current differential
Protection
Three sections

21P

phase-to-phase































distance protection
Three sections
21G

earthing distance
protection

21FL

Fault Location
Four sections
zero-sequence

67NT

current protection
(with direction
interlock)
Overcurrent

50

protection(TV
disconnection valid)

51

overload protection







79

Reclosing



































Self-diagnosis







TV Disconnection Warning







TA Disconnection Warning







Control circuit disconnection monitor







Fault waveform recorded







Control circuit











18

50BF

81U

27

50,67,27,59,47

After-acceleration
protection
CB Failure
protection
Low-Cycle Load
Dropping
Low Voltage
Splitting
Directional
OC protection

Control function

PT switchover
Hardware configuration
Binary input number

18

18

18

Binary output number

8

24

24

CAN、485、

CAN、485、

CAN、485、

Ethernet

Ethernet

Ethernet

Communication interface

2


NEW CENTURY RELAYS

EDCS-8210 HV Trans Line Protect Equipment Instruction Manual

Chassis structure

6U 19"/3

6U 19"/2

6U 19"/2

YY

YY

YY

Voltage transformer wire mode

2

TECHNICAL PARAMETERS

2.1 ENVIROMENTAL PARAMETER
Operation Temperature:0~40℃
Limited Temperature:-10~55℃
Storage and Transport:-25~75℃

2.2 RATED PARAMETERS
DC power:220V or 110V(please indicate when ordering)
AC voltage:100 / 3 V(Rated phase voltage Un)

AC current:5A or 1A(Rated phase current In,please indicate when ordering)

Rated frequency:50Hz
Overload capacity:
Current loop:2 times of rated current, continuous working
50 times of rated current, Allow 1 second
Voltage loop:1.5 times of rated voltage, continuous working
Power dissipation:
Current loop:Not more than 0.5 VA /Phase (when Rated value is 5A)
Not more than 0.5 VA /Phase (when Rated value is 1A)
Voltage loop:Not more than 0.5 VA /Phase (when Rated value is 100V)
Not more than 0.5 VA /Phase (when Rated value is 100/ 3 V)
DC loop:Normal, not more than 10 W
Trip, not more than 15 W

2.3 PERFORMANCE INDEX
2.3.1

Differential Protection

Differential current high value: 0.02~20.00In(In:TA Secondary rated current, the
following is same)
Differential current low value: 0.02~20.00In
Zero-sequence differential current value:

0.02~5.00In

Differential action time:

≤25ms (1.5 times of fixed value)

Current value error:

±3% or 0.02In

2.3.2

Distance protection

Phase-to-phase distance impedance setting range :0.05~125.00Ω
Phase-to-phase distance Ⅱ, III section action time: 0.01~10s
3


NEW CENTURY RELAYS

EDCS-8210 HV Trans Line Protect Equipment Instruction Manual

Distance protection value error:

±5%or0.05Ω

Phase-to-phase distanceⅠsection action time: ≤30ms (0.7 times of fixed value)
Phase-to-phase distanceⅡ、III section delay error: ±1%or30ms
2.3.3

Zero-sequence overcurrent protection

Current value:

0.10~20.00In

Delay value:

0.00~10.00s

Delay value error:

±1%or35ms

Current value error:

±3%or0.01In

Zero-sequence overcurrent Ⅰsection action time:
2.3.4

Overcurrent protection

Current value:

0.10~20.00In

Delay value:

0.00~10.00s

Delay value error:

±1%or35ms

Current value error:

±3%or0.01In

2.3.5

Overload protection

Current value:

0.10~3.00In

Overload Delay value:

0.10~10.00s

Overload value error:

±3%or 0.01In

Overload Delay value error:

±1% or 35ms

2.3.6

≤25ms (1.2 times fixed value)

Reclosing

Reclosing synchronization angle: 5.0°~90.0°
Reclosing delay value:

0.20~14.00s

Reclosing synchronization angle value error:
Reclosing delay value error:
2.3.7

±3°

±1%or±45ms

After-acceleration protection

Phase current value:

0.10~20.00In

Zero sequence current value: 0.10~20.00In
Distance after-acceleration impedance setting range:
Low voltage setting:

0.05~125.00Ω

10.00~80.00V

Phase after-acceleration action time:

≤60ms (1.2 times fixed value)

Zero sequence after-acceleration action time:

+60ms (0.10s delay)

Distance after-acceleration action time:≤60ms (0.7 times fixed value)
Distance after-acceleration protection value error:

4

±3%or0.05Ω


NEW CENTURY RELAYS

2.3.8

EDCS-8210 HV Trans Line Protect Equipment Instruction Manual

Failure protection

Failure starting value:

0.10~20.00In

Failure starting value error:

±3%or0.01In

2.3.9

Low-Cycle Load dropping

Low-Cycle Load dropping value: 45.10~49.90Hz
Low voltage clocking value:

20.00~100.00V

Frequency change rate value: 0.30~10.00Hz/s
Low-Cycle Load dropping delay value: 0.10~100.00s
Low-Cycle Load dropping value error: ≤0.01Hz
Low voltage clocking value error: ±3%
Frequency change rate value error:

±5%or 0.1Hz/s

Low-Cycle Load dropping delay value error:

±1%or35ms

2.3.10 Low Voltage Splitting
Low Voltage Splitting value:

20.00~100.00V

Voltage change rate value:

5.00~50.00V/s

Low Voltage Splitting delay value: 0.10~100.00s
Low Voltage Splitting value error: ±3%
Voltage change rate value error:

±5%or0.5V/s

Low Voltage Splitting delay value error: ±1%or35ms
2.3.11 Directional overcurrent protection
Under voltage setting:

2.00~100.00V

Negative sequence voltage setting: 2.00~57.00V
Current setting: 0.10~100.00A
Delay setting:

0.00~10.00s

Action time error of directional overcurrent protection :

±1% or ±40ms

Under voltage setting error of directional overcurrent protection:

±2.5%

Negative sequence voltage setting error of directional overcurrent protection:
±2.5% or ±0.10V
Current setting error of directional overcurrent protection: ±2.5%or ±0.10A
2.3.12 Output node capacity
Signal node capacity:
Allowable long-term utilize current 5A
Sever current 0.3A(DC220V,V/R 1ms)
Protection output Relay node capacity:
Allowable long-term utilize current 5A
5


NEW CENTURY RELAYS

EDCS-8210 HV Trans Line Protect Equipment Instruction Manual

Sever current 0.2A(DC220V,V/R 1ms)
Trip output node capacity:
Allowable long-term utilize current 8A
Sever current 0.3A(DC220V,V/R 1ms)

2.4 COMMUNICATION INTERFACE
Provide CAN communication interface, RS-485 communication interface, Ethemet
Interface,

communication

protocol

may

choose

the

power

industry

standard

DL/T667-1999(IEC60870-5-103)protocol, XSJ-7000DH protocol or Modbus protocol, the
communication ratio may setting up.
A group of optical interface (EDCS-82103 valid)
One GPS interface.
One print interface.

2.5 INSULATION PERFORMACE
2.5.1

Insulation resistance

In normal atmosphere environment, insulation resistances between energized and
non-energized sections as well as between those circuits with no electric connections are
no less than 100 tested by a mega ohmmeter at 500V open-circuit voltage.
2.5.2

Dielectric strength

In normal testing ambient atmosphere, the device is robust enough to withstand an
AC voltage-endurance test at 2000V 、 50Hz(rated insulation voltage>63V), 0.5kV 、
50Hz(rated insulation voltage≤63V), and lasting for 1min, yet without breakdown or
flashover phenomenon. In the course of trial, when a test loop is powered on the others
are connected to ground with equal potential.
2.5.3

Impulse voltage

In normal atmosphere environment, insulation resistances between energized and
non-energized sections as well as between those circuits with no electric connections, the
device is able to withstand a short-time inrush voltage test with 1.2/50μs standard
lightning surge, for the circuit of which voltage is less than 60 V the test voltage is 1kV, and
for that more then 60 V the test voltage is 5kV.
2.5.4

Moisture-heat resistant

Device can endure highest test temperature:+40, test time:two cycles (48 H); the
insulation of each regulated part are no less than 1.5  measured by a mega ohmmeter
at 500V open-circuit voltage, and can withstand 75% voltage of the dielectric strength test,
without breakdown or flashover phenomenon.
6


NEW CENTURY RELAYS

EDCS-8210 HV Trans Line Protect Equipment Instruction Manual

2.6 ELECTROMAGNETIC COMPATIBILITY CHARACTERISTICS
Oscillating wave anti-interference : under the protocol of GB/T 14598.13 ( IEC
60255-22-1); The harsh classification: III stage
Electrostatic Discharge Disturbance Test:in line with the protocol of GB/T 14598.14
(IEC 60255-22-2); The harsh classification: IV stage
RF electromagnetic field radiation anti-interference:in line with the protocol of GB/T
14598.9(IEC 60255-22-3)The harsh classification: III stage
Fast Transient Interference and Pulse Group Interference Test:in line with the
protocol of GB/T 14598.10(IEC 60255-22-4); The harsh classification: A stage
Surge Immunity Test:in line with r the protocol of GB/T 14598.18(IEC 60255-22-5);
The harsh classification: IV stage
Radiofrequency field inductive conduction disturbance:in line with the protocol of
GB/T 14598.17(IEC 60255-22-6); The harsh classification: III stage
Power current interference: in line with the protocol of GB/T 14598.19 (IEC
60255-22-7). The harsh classification: A stage.
Conducted emission limit value: in line with the protocol of GB/T 14598.16(IEC
60255-25).
Radiated emission limit value : in line with the protocol of GB/T 14598.16(IEC
60255-25).

2.7 MECHANICAL PROPERTIES
Vibration: Device can endure vibration durability and response test of the harsh
classification stage I ruled in GB/T 11287.
Impact: Device can endure impact durability and response test of the harsh
classification stage I ruled in GB/T 14537.
Crash: Device can endure crash test of the harsh classification stage 1 ruled in GB/T
14537.

7


NEW CENTURY RELAYS

EDCS-8210 HV Trans Line Protect Equipment Instruction Manual

3 FUNCTION PRINCIPLE
3.1 FUNCTION PRINCIPLE
3.1.1

Protection starting component

3.1.1.1 Starting component
1)

Phase-to-phase current power frequency variation starting component
Criterion: i  1.25I T  0.2I n
Illustration:

i is phase-to-phase current power frequency variation instantaneous value;
0.2I n is Fixed threshold value, I n is TA secondary rated current;
I T is floating threshold value,the value gradually auto controls with variation output
changes.
Illustration:
Phase-to-phase current power frequency variation wide 0.5S after component acts,
and open exit relay positive power supply.
2)

Zero sequence overcurrent starting component
When zero sequence current is larger than setting ,and no TA disconnection,open

exit relay positive power supply. Starting criterion:

I 0  I 0 qd And 3I 0  I 0 qd
Illustration:
External zero sequence current channel current need to be imported from another
group CT, it is not recommended that the outlet of the device three-phase protection
current is connected directly to the unit's zero sequence current channel
3)

Negative sequence overcurrent starting component
When negative sequence current is larger than the setting value,the 40ms delay,

open exit relay positive power supply. Starting criterion:


I 2  I 2 qd
3.1.2

Differential protection

During the differential protection,power frequency variation differential protection、
steady state Ⅰ section differential protection, steady state Ⅱ section differential
protection all adopt split-phase distinguish way.
3.1.2.1 Optical interface
Optical interface locates CPU module back, ray joint adopts FC type;Sending
device is 1310nm InGaAsP/InPMQW-FP diode laser (for short LD); ray receiving device
adopt InGaAs diode laser (for short PIN).
The device channel adopts dedicated fiber , when the device leaves factory,
8


NEW CENTURY RELAYS

EDCS-8210 HV Trans Line Protect Equipment Instruction Manual

transmitted power default value is -4.4dBm. When adopting dedicated fiber,only the
transmitted distance is longer than 10km,received power is not enough,need to increase
transmitted power,making received power larger than receiving sensitivity,and has
definite margin(6-10dBm).
Optical type: Single mode CCITT Rec.G652
Receiving sensitivity: -22dBm (2Mb/s)
Transmitted distance: <10kM (2Mb/s)
Interface standard:2Mb/s E1 interface
Delay requirement:Single transmission delay<15ms
3.1.2.2 Protection connection type
The CPU module of the device provides 2Mb/s high speed data channel,optical
channel only can use dedicated fiber.
When adopting dedicated fiber,the line two sides devices are directly connected
through optical channel ,seen as follows:

Optical
send

Optical
send

EDCS-82103

EDCS-82103

Optical
receive

Optical
receive

Chart 3-1 Dedicated optical connection way

3.1.2.3 Asynchronous sampling and data exchange

EDCS-82103

Main computer

EDCS-82103

Follw computer

Make protection each side as main computer,the other side as follow computer;main
and follow computer go on sampling based on respective sampling frequency,adjust
sampling point interval based on respective current power grid frequency , after
sampling ,go on fundamental wave Fourier transform for current, voltage,then et the
sampling vector,send offside three-phase current real part and imaginary part、TA
disconnection symbol、protection action symbol on the optical channel, main computer

9


NEW CENTURY RELAYS

EDCS-8210 HV Trans Line Protect Equipment Instruction Manual

side still send Tm used for channel delay monitor、sampling channel fault symbol to follow
computer side.
In order to monitor channel,the device sets channel abnormal SOE alarm information.
When channels have various kinds reasons , such as error code , not receive
communication frame,error code rate high etc., all lead that differential protection is
unreliable,the device send channel abnormal alarm information delay by 1s,and block
differential protection. After restoring channel communication , automatically relieve
interlock state.
3.1.2.4 Communication delay monitor and alarm
Under normal state,main computer calculates the time error Tm between receiving
information and sending information,seen in the following chart;When the difference
absolute value between current Tm detected from generator terminal and revised error
memory Tm0 is larger than certain value,immediately start sampling error calculated
command,if smaller than the value, think that sampling delay is under normal range,
correct parameter based on previous error.
If adjacent three times calculation value Tm,phase difference is larger than half of
fixed time sending cycle, immediately set sampling channel fault symbol, both send
sampling channel fault information,at the same time start sampling channel correction
program.














3.1.2.5 Sampling error calculation
When follow computer voltage time or synchronizing time error reaches or exceeds
internal value,follow computer immediately send sampling error calculation starting
report,the report includes send time code T0;main computer receives this report at T1
moment,until the next fixed send time T2,calculate out Tm0,send T2、Tm0、T0 time
information to follow computer,at T3 moment follow computer receives the report sent by
main computer at T2 moment, n this way get channel delay、sampling delay error based
on follow computer clock time T0、T3 and main computer clock time T2 and time error Tm
under private channel、fixed route condition.
Follow computer calculate out and save sampling delay error, and send it to main
computer, follow computer achieve sampling delay error calculation,immediately make
the three-phase current analog quantity that sends to offside as initial number 1,after

10


NEW CENTURY RELAYS

EDCS-8210 HV Trans Line Protect Equipment Instruction Manual

main computer receive the sampling delay error time sent by offside,indicate that
sampling delay error calculation is over, also make analog quantity as initial number 1,
at the same time the two sides both make sampling delay error △T as the compensation
constant.

Vector before modifying

Modified vector

Modified vector

Vector before modifying

θ

Follow computer side

θ

Follow computer side

3.1.2.6 Vector revised method
From the chart,make this side receive phase current real part and imaginary part
sent by offside,according to two sides of vector sampling delay error △T and current
power grid frequency etc. ,compensate sampling data.
3.1.2.7 Communication interface
The key of data differential protection is the exchange of current data between two
sides of differential protection,the device data interface adopts 2Mb/s synchrony data
interface standard of ITU-G.703.
3.1.2.8 Weak line side fault state distinguish
1)

Logic description
When happening three-phase fault inside area,weak power supply side current

starting component may not act,this moment go on boost voltage component distinguish.
If receiving offside A phase differential protection allowable signal,this moment this
side voltage power frequency variation component、phase current power frequency
variation component 、 zero sequence overcurrent component 、 negative sequence
overcurrent component not start,under TV no disconnection conditions,Ua<35V or Uab
<60V or Uca<60V,continuously meets the above conditions,set A phase weak line
starting symbol,protection not meets action condition and delay by 200ms and return,
protection meets action condition,send tripping command and return.
If receiving offside B phase differential protection allowable signal,this moment this
side voltage power frequency variation component、phase current power frequency
variation component 、 zero sequence overcurrent component 、 negative sequence
overcurrent component not start,under TV no disconnection conditions,Ub<35V or Uab
<60V or Ubc<60V,continuously meets the above conditions,set B phase weak line
11


NEW CENTURY RELAYS

EDCS-8210 HV Trans Line Protect Equipment Instruction Manual

starting symbol,protection not meets action condition and delay by 200ms and return,
protection meets action condition,send tripping command and return.
If receiving offside B phase differential protection allowable signal,this moment this
side voltage power frequency variation component、phase current power frequency
variation component 、 zero sequence overcurrent component 、 negative sequence
overcurrent component not start,under TV no disconnection conditions,Uc<35V or Ubc
<60V or Uca<60V,continuously meets the above conditions,set C phase weak line
starting symbol,protection not meets action condition and delay by 200ms and return,
protection meets action condition,send tripping command and return.
If receiving offside zero sequence differential protection allowable signal,this moment
this side voltage power frequency variation component、phase current power frequency
variation component 、 zero sequence overcurrent component 、 negative sequence
overcurrent component not start,under TV no disconnection conditions,
,Min(Ua、Ub、
Uc)<35V or Min(Uab、Ubc、Uca)<60V,continuously meets the above conditions,
set A、B、C phase weak line starting symbol,protection not meets action condition and
delay by 200ms and return,protection meets action condition,send tripping command and
return.
2)

Logic diagram

Interphase current power frequency variation
component start

Zero sequence overcurrent component start

≥1

Negative sequence overcurrent component start

&

Offside A phase differential allowable signal

0
200ms

Weak feed back A phase start

TV disconnection

Ua<35V

Uab<60V

≥1

Uca<60V

Note:weak line B,C phase start is the same as A phase logic diagram,voltage and
allowable symbol respectively gets from related phase.
Interphase current power frequency variation
component start

Zero sequence overcurrent component start

≥1

Negative sequence overcurrent component start

Weak feed back A phase start

&

Offside zero sequence differential allowable signal

0
200ms

Weak feed back B phase start

TV disconnection
Weak feed back C phase start
Min(Ua、Ub、Uc)<35V

≥1
Min(Uab、Ubc、Uca)<60V

12


NEW CENTURY RELAYS

EDCS-8210 HV Trans Line Protect Equipment Instruction Manual

3.1.2.9 Power frequency variation phase differential protection
Make this side current as subscript 1,offside current as subscript 2,zero sequence
current as subscript 0 , TA ratio compensation coefficient k=In2/In1 , respectively
calculate differential and braking current according to phase difference.
Differential current : I cd  I1  I2
Braking current: I zd  I1  I2
Illustration: I1  I1 ( t )  2 I1 ( t T )  I1 ( t 2T )

I2  I2 (t )  2 I2 (t T )  I2 (t 2T )
I1 (t ) 、I1 (t T ) 、I1 (t 2T ) respectively is this side current variation vector of t moment、
t-T moment、t-2T moment. I2 (t ) 、 I2 ( t T ) 、 I2 (t 2T ) respectively is offside current
variation vector of t moment、t-T moment、t-2T moment. T is 20ms。

I cd  0.75  I zd

Action
equation:

I cd  DIT  DIc d z1d

Illustration:  is A、B、C;

I1 is this side current power frequency variation ;

I2 is this side current power frequency variation;
DIcdzd1 is differential current starting fixed threshold , is calculated by
differential current high value I cdzd1 ;

DIT is differential current starting float threshold.
3.1.2.10

Steady state Ⅰ section differential protection

Differential current : I cd  I1  I2
Braking current: I zd  I1  I2
Equation:

I cd  0.75  I zd
I cd  I cdzd1

Illustration:  is A、B、C;

I cdzd1 is differential current high value;
3.1.2.11

Steady state II section differential protection

Differential current: I cd  I1  I2
13


NEW CENTURY RELAYS

EDCS-8210 HV Trans Line Protect Equipment Instruction Manual

Braking current: I zd  I1  I2

I cd  0.75  I zd

Equation:

I cd  I cdzd 2
Illustration:  is A、B、C;

I cdzd 2 is differential current low value;
Note :Steady state Ⅱ section differential protection act by 40ms delay.
3.1.2.12 Zero sequence differential protection
Differential current: I cd 0  I10  I20
Braking current: I zd 0  I10  I20

I cd 0  0.75  I zd 0

Equation:

I cd 0  I cdzd 0
Illustration: I cdzd 0 is zero sequence differential current value;
3.1.2.13 Offside differential allowable signal
1)

Logic illustration
Tripping location:TWJ external state is 1. When auxiliary value“ input 1 is TWJ” is set

as 0,tripping location gets from the power supply panel TWJ state;When auxiliary
value input 1 is TWJ” is set as 1,tripping location gets from IO panel input 1 state;
2)

Logic diagram
Tripping location

&

Max(Ia、Ib、Ic)<0.04In

A phase TA disconnection

&

≥1

TA disconnection interlock diff.

&

Diff. protection hard platen input

&
Power freq. variation diff. soft platen input

&

≥1

Power freq. variation A phase diff. allowable signal

Channel abnormal

A phase variation diff. component act

&

Protection starting component act

Note :power frequency variation B,C phase differential allowable signal is the same
as A phase logic diagram.

14


NEW CENTURY RELAYS

EDCS-8210 HV Trans Line Protect Equipment Instruction Manual

Tripping location

&

Max(Ia、Ib、Ic)<0.04In

A phase TA disconnection

&

≥1

TA disconnection interlock diff.

&

Diff. protection hard platen input

&
&

Steady state Ⅰsection diff. soft platen input

≥1

Steady stateⅠ section A phase diff. allowable signal

Channel abnormal

A phase steady state Ⅰ section diff. component act

&

Protection starting component act

Note: steady stateⅠ section B,C phase differential allowable signal is the same as
A phase logic diagram.
Tripping location

&

Max(Ia、Ib、Ic)<0.04In

A phase TA disconnection

&

≥1

TA disconnection interlock diff.

&

Diff. protection hard platen input

&
&

Steady state Ⅱ section diff. soft platen input

≥1

Steady state Ⅱ section A phase diff. allowable signal

Channel abnormal

A phase steady state Ⅱ section diff. component act

&

Protection starting component act

Note: steady state II section B,C phase differential allowable signal is the same as
A phase logic diagram.
Tripping location

&

Max(Ia、Ib、Ic)<0.04In

TA disconnection

&

≥1

TA disconnection interlock diff.

&

Input diff. protection hard platen
ZS diff.l protection soft platen input

Channel abnormal

&
&

≥1

Zero sequence diff. allowable signal

Zero sequence diff. component act

&
Protection starting component act

15


NEW CENTURY RELAYS

EDCS-8210 HV Trans Line Protect Equipment Instruction Manual

Note :Differential component action value that is mentioned by differential allowable
logic and differential action logic is affected by“TA disconnection interlocks” control word.
When the control word is set as 0,happening TA disconnection fault,disconnection phase
differential component act according to TA disconnection differential value , no
disconnection phase still act according to differential protection value. When “TA
disconnection interlock” control word is set as 1,interlock differential protection act after
happening TA disconnection.
3.1.2.14 Power frequency variation phase differential protection action logic
1) A phase power frequency variation differential protection logic description
After each phase power frequency variation current component ΔI meets conditions,go
on braking current and differential current distinguish,whne differential current meets
conditions,and braking current meets action conditions,protection and action output.
Note :


Other two phase‟s protection action logic is the same as A phase protection action
logic.



Return after power frequency differential protection act:after action steady state
differential current is smaller than 0.5 times of steady stateⅠ section differential
protection value and return.

2) A phase power frequency variation differential protection logic diagram
A phase TA disconnection

&

≥1

TA disconnection interlock diff.

Diff.protection hard platen input

&
Power freq. variation diff. soft platen input

&

Channel abnormal

&

Power freq. variation diff. act

A phase power freq. variation diff. component act

≥1
Offside trip input is 1

This side protection starting component act

&

Offside A phase diff. allowable signal

Note :power frequency variation B,C phase differential action logic is the same as
A phase logic diagram.
Illustration:


This side protection starting component action only includes power frequency
variation phase current start.



16

A phase differential allowable signal:power frequency variation A phase differential


NEW CENTURY RELAYS

EDCS-8210 HV Trans Line Protect Equipment Instruction Manual

allowable signal is 1, or steady state Ⅰ section A phase differential allowable signal
is 1, or steady state Ⅱ section A phase differential allowable signal is 1,or zero
sequence differential allowable signal is 1,or weak side A phase allowable signal.
The same as below.


B phase differential allowable signal:power frequency variation B phase differential
allowable signal is 1,or steady stateⅠsection B phase differential allowable signal is
1,or steady state Ⅱ section B phase differential allowable signal is 1,or zero
sequence differential allowable signal is 1,or weak side B phase allowable signal.
The same as below.



C phase differential allowable signal:power frequency variation C phase differential
allowable signal is 1,or steady stateⅠsection C phase differential allowable signal is
1,or steady stateⅡsection C phase differential allowable signal is 1,or zero
sequence differential allowable signal is 1,or weak side A phase allowable signal.
The same as below.

3.1.2.15 Steady stateⅠ section phase differential protection logic diagram
1) A phase steady state Ⅰ section phase differential protection logic description
After each phase starting components continuous distinguish meets conditions,go on
steady state current component distinguish,when meeting conditions,go on braking current
and differential current distinguish,and braking current meets action conditions, protection
and action output.
Note :


Other two phases protection action logic is the same as A phase protection action
logic.



Return after steady state differential protection act : after action steady state
differential current is smaller than 0.9 times of steady stateⅠ section differential
protection value and return.

2) A phase steady state Ⅰ section phase differential protection logic diagram
A phase TA disconnection

&

≥1

TA disconnection interlock diff.

Diff. protection hard platen input

&
Steady state Ⅰ section diff. soft platen input

&

Channel abnormal

&

Steady stateⅠ section diff. act

A phase steady stateⅠ section diff. component act

≥1
Offside trip input is 1

This side protection starting component act

&

Offside A phase diff. allowable signal

17


NEW CENTURY RELAYS

EDCS-8210 HV Trans Line Protect Equipment Instruction Manual

Illustration:
This side protection starting component action includes power frequency variation
phase current start、zero sequence current start and negative sequence current start.
3.1.2.16 Steady state II section phase differential protection logic diagram
1) A phase steady state II section phase differential protection logic description
After each phase starting components continuous distinguish meets conditions,go on
steady state current component distinguish,when meeting conditions,go on braking current
and differential current distinguish,and braking current meets action conditions, protection
and action output.
Note:


Other two phases protection action logic is the same as A phase protection action
logic.



Return after steady state differential protection act : after action steady state
differential current is smaller than 0.9 times of steady state II section differential
protection value and return.

2) A phase steady state II section phase differential protection logic diagram
A phase TA disconnection

&

≥1

TA disconnection interlock diff.

Diff. protection hard platen input

&
Steady state Ⅱ section diff.l soft platen input

&

Channel abnormal

&

Steady state Ⅱ section diff. act

A phase steady state Ⅱ section diff.component act

≥1
Offside trip input is 1

This side protection starting component act

&

Offside A phase diff. allowable signal

Illustration:
This side protection starting component action includes power frequency variation
phase current start、zero sequence current start and negative sequence current start.

18


NEW CENTURY RELAYS

EDCS-8210 HV Trans Line Protect Equipment Instruction Manual

3.1.2.17 Zero sequence differential protection action logic
TA disconnection

&

≥1

TA disconnection interlock diff.

Diff. protection hard platen input

&
Zero sequence diff. soft platen input

&

Channel abnormal

&

Zero sequence diff.l act

Zero sequence diff. component act

≥1
Offside trip input is 1

This side protection starting component act

&

Offside A phase diff. allowable signal

Offside B phase diff. allowable signal

≥1

Offside C phase diff. allowable signal

Illustration:
This side protection starting component action includes power frequency variation
phase current start、zero sequence current start and negative sequence current start.
3.1.2.18 Remote trip logic
Interphase current power freq.variation start
Zero sequence overcurrent start

≥1

&

Negative sequence overcurrent start

Differential protection hard platen input

Receive offside tripping signal

≥1

Distant place start trip

&

Trip control word by the side control is 1

Trip allowable control word is 1

3.1.2.19 TA saturation
When happening near-end fault outside area,TA may have transient saturation,
because the device adopts higher braking coefficient and floating braking threshold,make
sure that the device should not act wrongly under severe saturation condition.
3.1.3

Distance protecton

This unit has three-stage circular features phase-to-phase, earth distance protection
and two for the far backup of the quadrilateral phase-to-phase, earth distance protection.
This protection is polarized by the positive sequence voltage, thus it has larger ability of
measuring transition resistance. For better used in short circuit protection, expanding the
ability of measuring transition resistance, it also is equipped with the impedance offset
angle, which could offset the impedance fromⅠ, Ⅱ section to the first quadrant.

19


Tài liệu bạn tìm kiếm đã sẵn sàng tải về

Tải bản đầy đủ ngay

×