CN103683227B - A kind of method of Substation Station alternating current power supply two sections protection Graded coordination - Google Patents
A kind of method of Substation Station alternating current power supply two sections protection Graded coordination Download PDFInfo
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- CN103683227B CN103683227B CN201310660029.8A CN201310660029A CN103683227B CN 103683227 B CN103683227 B CN 103683227B CN 201310660029 A CN201310660029 A CN 201310660029A CN 103683227 B CN103683227 B CN 103683227B
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Abstract
The present invention provides the method for a kind of Substation Station alternating current power supply two sections protection Graded coordination; including: standing with becoming the overcurrent protection time of alternating current inlet wire switch I section protection and spending stream definite value and the overcurrent protection time of II section protection and cross stream definite value, the overcurrent protection time of the I section protection of described setting and the overcurrent protection time of II section protection are shorter than the guard time that described station becomes higher level's high-voltage switch gear；When there is over current fault, crossing in stream limits if crossing stream what II section was protected, then jumping into wiretap according to the overcurrent protection time delays of the II section protection set；If crossing to flow crosses in stream limits what I section was protected, then jump into wiretap according to the overcurrent protection time delays of the I section protection set；II section protection simultaneously also starts jumps into wiretap, and I section and II section protect successively output, implement the present invention, can effectively prevent switch failure, it is achieved stands and becomes the Graded coordination protection of higher level's high-voltage switch gear with change alternating current inlet wire switch and station.
Description
Technical field
The present invention relates to technical field of electric power, particularly relate to a kind of two sections of protected levels of Substation Station alternating current power supply
The method that difference coordinates.
Background technology
In prior art, existing Substation Station alternating current power supply service entrance switch is inverse time-lag protection, has served as stream
Multiple do not reach instantaneous trip protection time, it may be necessary to the time of 10 seconds or 100 seconds could section breaker,
Now station is with becoming the tripping operation of higher level's high-voltage switch gear definite time protection, and this belongs to trip protection of bypassing the immediate leadership.
Trip protection fault of bypassing the immediate leadership in recent years occurs, such as again and again:
Case 1:2005 220kV transformer station life load earth fault on March 6, exchange feeder line is opened
Close, alternating current inlet wire switch does not trips, and change zero-sequencedirectional protection of stand action tripping operation #1 station of bypassing the immediate leadership becomes, and 380V is standby certainly
Throwing action switch, because fault still exists, cause #2 station become zero-sequencedirectional protection bypass the immediate leadership action tripping operation.Entirely stand exchange
After dead electricity, affect active air-cooled motor, main transformer forced outage, cause large-area power-cuts.
Cause of accident:
Life on-load switch does not configures earth leakage protective, it is impossible to reflection earth fault is isolated；
Change zero-sequencedirectional protection of standing is bypassed the immediate leadership after action tripping operation, and the switching of 380V prepared auto restart expands accident scope.
220kV in July transformer station generation feeder line branch road BN is short-circuit for case 2:2011, and feeder switch is not jumped
Lock, stands and does not trips with alternating current inlet wire switch, and 380V prepared auto restart zero-sequencedirectional protection becomes zero sequence mistake because of setting valve with station
Stream protection is mismatched and connection principle is that ground protection is not operating, and change zero-sequencedirectional protection of stand action of bypassing the immediate leadership is tripped
After, the switching of 380V prepared auto restart expands accident scope, causes Quan Zhanzhan to exchange dead electricity.
Cause of accident:
Switch and do not coordinate with station change protection at phase zero failure after heat magnetic protection act curve, it is impossible to isolate in time
Fault；
Change zero-sequencedirectional protection of standing is bypassed the immediate leadership after action tripping operation, and the switching of 380V prepared auto restart expands accident scope.
There is feeder line branch road ABC phase fault in case 3:2012 110kV in January transformer station, feeder line is opened
Closing and do not trip, stand and do not trip with alternating current inlet wire switch, change overcurrent protection of stand is bypassed the immediate leadership action, and not locking 380V is standby certainly
Throwing action switches, and causes Quan Zhanzhan alternating current power supply dead electricity.
Cause of accident:
(1) switch pyromagnetic protection act curve after ABC phase fault does not coordinate with station change protection,
Cannot isolated fault in time；
(2) change overcurrent protection of standing is bypassed the immediate leadership after action tripping operation, and the switching of 380V prepared auto restart expands accident scope.
From above accident, bypass the immediate leadership trip protection action time whole transformer station will be caused all to have a power failure, this meeting
Massive losses is brought to whole power system.
Summary of the invention
For solving above-mentioned technical problem, the present invention provides a kind of Substation Station alternating current power supply two sections protection differential
The method coordinated, including:
Set and become, with Substation Station, the station change alternating current inlet wire switch I section protection that higher level's high-voltage switch gear matches
The overcurrent protection time and cross stream definite value and II section protection the overcurrent protection time and cross stream definite value, described in set
It is high that the overcurrent protection time of fixed I section protection and the overcurrent protection time of II section protection become higher level than described station
The guard time compressed switch is short；
When a failure occurs it, if crossing stream and crossing in stream limits, then according to the II section set what II section was protected
The overcurrent protection time delays of protection jumps into wiretap；
If crossing to flow crosses in stream limits what I section was protected, then time according to the overcurrent protection of the I section protection set
Between time delay jump into wiretap；II section protection simultaneously also starts jumps into wiretap, I section and II section protection successively output,
Prevent switch failure；
Wherein, cross in stream limits if crossing stream what I section was protected, then flow according to the crossing of I section protection set
The step of wiretap is jumped in guard time time delay, including:
Step 1, it is judged that whether I section overcurrent protection control word puts into, if put into, performs step 2；
Step 2: judge whether the maximum of A, B, C three-phase phase current crosses stream definite value more than what I section was protected；
If so, continue to judge when whether the overcurrent delay time that I section is protected is more than the overcurrent protection that the I section set is protected
Between, the most then perform step 3；
Step 3: overcurrent protection action, switches block signal, and action outputed by relay, and the outside stream of crossing of prompting is sent out
Raw, and cross stream locking switching；
Step 4: judge that I section protected stream to jump into whether line traffic control word puts into；If put into, perform step 5；
Step 5: banked relay, 3 pps pulse per second signals, tripping two-way service entrance switch are outputed in remote control.
Wherein, if described crossing stream crossing in stream limits in the protection of II section, then according to the II section protection set
Overcurrent protection time delays jump into the step of wiretap, including:
Step 1: judging that whether II section protection overcurrent protection control word puts into, if put into, performing step 2；
Step 2: judge whether the maximum of A, B, C three-phase phase current crosses stream definite value more than what II section was protected；
If so, continue to judge whether the overcurrent delay time that II section is protected protected stream to protect more than the II section of described setting
Protect the time, the most then perform step 3；
Step 3: overcurrent protection action, switches block signal, and action outputed by relay, and the outside stream of crossing of prompting is sent out
Raw, and cross stream locking switching；
Step 4: judge that II section protected stream to jump into whether line traffic control word puts into；If put into, perform step 5；
Step 5: banked relay, 3 pps pulse per second signals, tripping two-way service entrance switch are outputed in remote control.
Implement the method that the present invention provides a kind of Substation Station alternating current power supply two sections protection Graded coordination, pass through
Arranging I section and II section definite time protection, setting time and the current ration of two sections of protections are high with becoming higher level with station
Compress switch coupling, and the guard time set is shorter than the guard time that higher level switchs setting.When stream event occurred
During barrier, flow in II section protection definite value if crossing, then set time delays according to the protection of II section and jump into wiretap；
If crossing stream (to comprise II section protection definite value) in I section protection definite value, then set time delays according to the protection of I section
Jumping into wiretap, II section protection simultaneously also starts jumps into line, and I section and II section protection successively output prevent switch
Tripping.Realize station with becoming alternating current inlet wire switch and the station Graded coordination protection becoming higher level's high-voltage switch gear.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to enforcement
In example or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, describe below
In accompanying drawing be only some embodiments of the present invention, for those of ordinary skill in the art, do not paying
On the premise of going out creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 provides the method for a kind of Substation Station alternating current power supply two sections protection Graded coordination to implement for the present invention
The schematic flow sheet of example one；
Fig. 2 provides the method for a kind of Substation Station alternating current power supply two sections protection Graded coordination to implement for the present invention
The schematic flow sheet of example two；
Fig. 3 provides the method for a kind of Substation Station alternating current power supply two sections protection Graded coordination to implement for the present invention
The schematic flow sheet of example three.
Detailed description of the invention
Fig. 1 provides the method for a kind of Substation Station alternating current power supply two sections protection Graded coordination to implement for the present invention
The schematic flow sheet of example one；
As it is shown in figure 1, the present invention provides the side of a kind of Substation Station alternating current power supply two sections protection Graded coordination
Method, including:
Step 100, sets and becomes, with Substation Station, the station change alternating current inlet wire switch that higher level's high-voltage switch gear matches
I section protection the overcurrent protection time and cross stream definite value and II section protection the overcurrent protection time and cross stream definite value,
The overcurrent protection time of the I section protection of described setting and the overcurrent protection time of II section protection become than described station
The guard time of higher level's high-voltage switch gear is short；
Step 101, when a failure occurs it, crosses in stream limits, then according to setting if crossing stream what II section was protected
The overcurrent protection time delays of fixed II section protection jumps into wiretap；
Step 102, crosses in stream limits if crossing stream what I section was protected, then according to the I section protection set
Overcurrent protection time delays jumps into wiretap；II section protection simultaneously also starts jumps into wiretap, and I section and II section are protected
Protect successively output, prevent switch failure.
Fig. 2 provides the method for a kind of Substation Station alternating current power supply two sections protection Graded coordination to implement for the present invention
The schematic flow sheet of example two；
If the present embodiment two is crossed in stream limits, then according to the I section set by describing to cross to flow what I section was protected
Protection overcurrent protection time delays jump into wiretap step implement process, including:
Step 200, it is judged that whether I section overcurrent protection control word puts into, if put into, performs step 201；
Otherwise, execution step 200 is returned.
Step 201: judge whether the maximum of A, B, C three-phase phase current is determined more than the stream of crossing of I section protection
Value；If so, continue to judge whether the overcurrent delay time that I section is protected protects more than the stream of crossing of the I section protection set
Protect the time, the most then perform step 202；If it is not, return step 200.
Step 202: overcurrent protection action, switches block signal, and action outputed by relay, and prompting is outside crosses stream
Occur, and cross stream locking switching.
Step 203: judge that I section protected stream to jump into whether line traffic control word puts into；If put into, perform step
204；Otherwise, execution step 200 is returned.
Step 204: banked relay, 3 pps pulse per second signals, tripping two-way service entrance switch are outputed in remote control.
Fig. 3 provides the method for a kind of Substation Station alternating current power supply two sections protection Graded coordination to implement for the present invention
The schematic flow sheet of example three.
If the present embodiment three is crossed in stream limits, then according to setting by describing described stream of crossing in the protection of II section
II section protection overcurrent protection time delays jump into wiretap step realize process, including:
Step 300: judging that whether II section protection overcurrent protection control word puts into, if put into, performing step
301；Otherwise, execution step 300 is returned.
Step 301: judge whether the maximum of A, B, C three-phase phase current is determined more than the stream of crossing of II section protection
Value；If so, continue to judge whether the overcurrent delay time that II section is protected was protected more than the II section of described setting
Stream guard time, the most then perform step 302；Otherwise, execution step 300 is returned.
Step 302: overcurrent protection action, switches block signal, and action outputed by relay, and prompting is outside crosses stream
Occur, and cross stream locking switching；
Step 303: judge that II section protected stream to jump into whether line traffic control word puts into；If put into, perform step
Rapid 304；Otherwise, execution step 300 is returned.
Step 304: banked relay, 3 pps pulse per second signals, tripping two-way service entrance switch are outputed in remote control.
Implement the method that the present invention provides a kind of Substation Station alternating current power supply two sections protection Graded coordination, pass through
Arranging I section and II section definite time protection, setting time and the current ration of two sections of protections are high with becoming higher level with station
Compress switch coupling, and the guard time set is shorter than the guard time that higher level switchs setting.When stream event occurred
During barrier, flow in II section protection definite value if crossing, then set time delays according to the protection of II section and jump into wiretap；
If crossing stream (to comprise II section protection definite value) in I section protection definite value, then set time delays according to the protection of I section
Jumping into wiretap, II section protection simultaneously also starts jumps into line, and I section and II section protection successively output prevent switch
Tripping.Realize station with becoming alternating current inlet wire switch and the station Graded coordination protection becoming higher level's high-voltage switch gear.
One of ordinary skill in the art will appreciate that all or part of flow process realizing in above-described embodiment method,
Can be by computer program and complete to instruct relevant hardware, described program can be stored in a calculating
In machine read/write memory medium, this program is upon execution, it may include such as the flow process of the embodiment of above-mentioned each method.
Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory,
Or random store-memory body (Random Access Memory, RAM) etc. ROM).
Above content is to combine concrete preferred implementation further description made for the present invention, no
Can assert the present invention be embodied as be confined to these explanations.Common for the technical field of the invention
For technical staff, without departing from the inventive concept of the premise, it is also possible to make some simple deductions or replace
Change, all should be considered as belonging to protection scope of the present invention.
Claims (2)
1. the Substation Station method of alternating current power supply two sections protection Graded coordination, it is characterised in that including:
Set and become, with Substation Station, the station change alternating current inlet wire switch I section protection that higher level's high-voltage switch gear matches
The overcurrent protection time and cross stream definite value and II section protection the overcurrent protection time and cross stream definite value, described in set
It is high that the overcurrent protection time of fixed I section protection and the overcurrent protection time of II section protection become higher level than described station
The guard time compressed switch is short；
When a failure occurs it, crossing in stream limits if crossing stream what II section was protected, protecting according to the II section set
The overcurrent protection time delays protected jumps into wiretap；
If crossing to flow crosses in stream limits what I section was protected, according to the overcurrent protection time of the I section protection set
Wiretap is jumped in time delay；II section protection simultaneously also starts jumps into wiretap, I section and II section protection successively output,
Prevent switch failure；
Wherein, if described crossing stream crossing in stream limits in the protection of I section, then according to the I section protection set
Overcurrent protection time delays jumps into the step of wiretap, including:
Step 1, it is judged that whether I section overcurrent protection control word puts into, if put into, performs step 2；
Step 2: judge whether the maximum of A, B, C three-phase phase current crosses stream definite value more than what I section was protected；
If so, continue to judge when whether the overcurrent delay time that I section is protected is more than the overcurrent protection that the I section set is protected
Between, the most then perform step 3；
Step 3: overcurrent protection action, switches block signal, and action outputed by relay, and the outside stream of crossing of prompting is sent out
Raw, and cross stream locking switching；
Step 4: judge that I section protected stream to jump into whether line traffic control word puts into；If put into, perform step 5；
Step 5: banked relay, 3 pps pulse per second signals, tripping two-way service entrance switch are outputed in remote control.
2. the Substation Station as claimed in claim 1 method of alternating current power supply two sections protection Graded coordination, its
It is characterised by, crosses stream crossing in stream limits in the protection of II section, then according to the II section protection set if described
Overcurrent protection time delays jump into the step of wiretap, including:
Step 1: judging that whether II section protection overcurrent protection control word puts into, if put into, performing step 2；
Step 2: judge whether the maximum of A, B, C three-phase phase current crosses stream definite value more than what II section was protected；
If so, continue to judge whether the overcurrent delay time that II section is protected protected stream to protect more than the II section of described setting
Protect the time, the most then perform step 3；
Step 3: overcurrent protection action, switches block signal, and action outputed by relay, and the outside stream of crossing of prompting is sent out
Raw, and cross stream locking switching；
Step 4: judge that II section protected stream to jump into whether line traffic control word puts into；If put into, perform step 5；
Step 5: banked relay, 3 pps pulse per second signals, tripping two-way service entrance switch are outputed in remote control.
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| CN201310660029.8A CN103683227B (en) | 2013-12-09 | 2013-12-09 | A kind of method of Substation Station alternating current power supply two sections protection Graded coordination |
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| CN201310660029.8A CN103683227B (en) | 2013-12-09 | 2013-12-09 | A kind of method of Substation Station alternating current power supply two sections protection Graded coordination |
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| CN107453338A (en) * | 2017-09-11 | 2017-12-08 | 湖南长高思瑞自动化有限公司 | The protection investigating method and system of a kind of photovoltaic plant |
| CN108493911B (en) * | 2018-05-02 | 2019-07-05 | 中铁第四勘察设计院集团有限公司 | Pressure ring network protection method in a kind of magnetic floating traffic |
| CN109217270B (en) * | 2018-10-08 | 2020-09-08 | 南方电网科学研究院有限责任公司 | DC line sectional type timing limit overcurrent protection method and device |
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| CN102832603A (en) * | 2012-09-18 | 2012-12-19 | 山东电力集团公司济宁供电公司 | Quick junctor fault isolation method compatible to low-voltage ride through operation of photovoltaic power station |
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| JPH02101925A (en) * | 1988-10-04 | 1990-04-13 | Togami Electric Mfg Co Ltd | Method and apparatus for detecting fine ground occurring section |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102832603A (en) * | 2012-09-18 | 2012-12-19 | 山东电力集团公司济宁供电公司 | Quick junctor fault isolation method compatible to low-voltage ride through operation of photovoltaic power station |
Non-Patent Citations (1)
| Title |
|---|
| 深圳电网继电保护整定方案的优化;王碧等;《硅谷》;20130131(第2期);第56-57页 * |
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