CN102738779A - Coordination control method of wide area protection and stabilization device - Google Patents
Coordination control method of wide area protection and stabilization device Download PDFInfo
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- CN102738779A CN102738779A CN2012102144605A CN201210214460A CN102738779A CN 102738779 A CN102738779 A CN 102738779A CN 2012102144605 A CN2012102144605 A CN 2012102144605A CN 201210214460 A CN201210214460 A CN 201210214460A CN 102738779 A CN102738779 A CN 102738779A
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Abstract
The invention provides a coordination control method of wide area protection and a stabilization device, which comprises the following steps of: partitioning of a power grid, setting of wide area protection in partitions, and coordination of the wide area protection and the stabilization device, thereby avoiding expansion of an accident. By adopting the coordination control method of the wide area protection and the stabilization device, when an overload is caused on a power transmission line as a result of failure, the overload can be eliminated due to coordination of relay protection and the stabilization device, stable operation of the system can be ensured, and inter-tripping caused by the overload can be avoided.
Description
Technical field
The invention belongs to field of relay protection in power, be specifically related to a kind of wide area protection and stable device control method for coordinating.
Background technology
In electric power system; The safety of protected element is only considered in traditional relaying protection, does not consider the influence of its action behavior to system, lacks between while and the stable device to coordinate control; Can worsen the operation conditions of system in some cases, even cause cascading trip.
The accident of having a power failure on a large scale that takes place in recent years is relevant with stable device incoordinate movement with relaying protection; From theoretical side; What have a power failure on a large scale is that the two lacks coordinates and cooperation, has leak or blind area owing to be connected defective tightness between relaying protection and the stable control; From technological layer, also very difficult coordination the between the action relatively at a slow speed of the quick acting of relaying protection and stable device.This is because relaying protection does not rely on system call; Do without help out and break down or overladen judgement; And then excision fault or overload electric equipment, more be angle and stablize control from system, control through comprehensive judgement system information.
Summary of the invention
For overcoming above-mentioned defective, the invention provides a kind of wide area protection and stable device control method for coordinating, can avoid cascade tripping, improve the stability of a system, the have a power failure on a large scale risk of accident of reduction system.
For realizing above-mentioned purpose, the present invention provides a kind of wide area protection and stable device control method for coordinating, a kind of wide area protection and stable device control method for coordinating, and its improvements are that said method comprises the steps:
(1). according to being electrically connected electrical network is carried out subregion, electrical network is divided into several zones, the subregion number is decided according to the bar number of circuit in the electrical network, guarantees that each subregion number of lines is no more than 20;
(2). for each subregion, the wide area protection device is set, Monitoring Line electric current and switching value information;
(3). judge whether line protective devices start in the subregion,, otherwise carry out step 5 if start then carry out step 4;
(4) if. protective device does not start and line current during greater than setting value; The wide area protection device calculates the sustainable time of overload according to the thermally-stabilised limit of circuit; Overload information is sent to stable device, and while this circuit distance protection III section of locking also jumps to step 6;
(5). when protective device starts and the action outlet; Trip signal is sent to stable device; Behind the failure removal, electric current is during greater than setting value, and the wide area protection device calculates the sustainable time of overload according to the thermally-stabilised limit of circuit; This circuit distance protection of locking III section is sent to stable device with overload information;
(6). stable device takes to limit the overload measure, in the sustainable time of overload, eliminates circuit overload, if circuit overload is eliminated in the sustainable time of overload, then opens the circuit distance protection III section of locking before and returns step 2; Otherwise, wide area protection device excision overload circuit.
In the optimal technical scheme provided by the invention, in said step 1, according to being electrically connected electrical network is carried out subregion, the union of each subregion should cover whole electrical network.
In second optimal technical scheme provided by the invention, in said step 2, each subregion is installed 2 cover wide area protection devices, and is subsequent use each other.
In the 3rd optimal technical scheme provided by the invention, in said step 2, the wide area protection device is gathered the magnitude of current and the switching value of circuit in the subregion.
In the 4th optimal technical scheme provided by the invention, in said step 5, protective device action in the subregion, the wide area protection device is delivered to stable device with switching value.
In the 5th optimal technical scheme provided by the invention; Under the normal condition or behind the failure removal; When needing only the line load electric current greater than setting value; Wide area protection just calculates the sustainable time of overload according to the thermally-stabilised limit of circuit, the distance protection III section of locking overload circuit, and overload information is sent to stable device.
With the prior art ratio, a kind of wide area protection provided by the invention and stable device control method for coordinating are when fault causes the transmission line overload; Utilize cooperatively interacting between relaying protection and the stable device; Eliminate overload, guarantee system stable operation, prevent the cascading trip that overload causes; Can utilize cooperatively interacting between relaying protection and the stable device, prevent the protection cascading trip that circuit overload causes.
Description of drawings
Fig. 1 is the embodiment fiting relation figure of wide area protection device and stable device
Fig. 2 is the embodiment flow chart of wide area protection and stable device control method for coordinating.
Embodiment
Embodiment 1:
Like Fig. 1, shown in 2, a kind of wide area protection and stable device control method for coordinating may further comprise the steps:
(1). electrical network is carried out subregion, electrical network is divided into several zones;
(2). two cover wide area protection devices are installed in each zone, and are subsequent use each other, the magnitude of current and the switching value information of circuit in the pickup area;
(3). during regional internal fault, during the protective device action, switch motion information is sent to stable device;
(4). after not having fault or failure removal in the zone, when line current during greater than setting value, wide area protection calculates the sustainable time of overload according to the thermally-stabilised limit of circuit;
(5). wide area protection sends overload circuit and corresponding sustainable time of overload to stable device, the distance protection III section of the overload of locking simultaneously circuit;
(6). stability control device takes measures to limit overload;
(7). in the sustainable time of overload, less than setting value, protection is returned as if line current, the distance protection III section of open locking;
(8). in the overload duration, if line current, is protected excision overload circuit still greater than setting value.
Embodiment 2:
Like Fig. 1, a kind of wide area protection shown in 2 and stable device control method for coordinating, comprise the steps:
(1). according to being electrically connected electrical network is carried out subregion, electrical network is divided into several zones, the subregion number is decided according to the bar number of circuit in the electrical network, guarantees that each subregion number of lines is no more than 20;
(2). for each subregion, the wide area protection device is set, Monitoring Line electric current and switching value information;
(3). judge whether line protective devices start in the subregion,, otherwise carry out step 5 if start then carry out step 4;
(4) if. line protective devices do not start and line current during greater than setting value; The wide area protection device calculates the sustainable time of overload according to the thermally-stabilised limit of circuit; Overload information is sent to stable device, and while this circuit distance protection III section of locking also jumps to step 6;
(5). when protective device starts and the action outlet; Trip signal is sent to stable device; Behind the failure removal, electric current is during greater than setting value, and the wide area protection device calculates the sustainable time of overload according to the thermally-stabilised limit of circuit; This circuit distance protection of locking III section is sent to stable device with overload information;
(6). stable device takes to limit the overload measure, in the sustainable time of overload, eliminates circuit overload, if circuit overload is eliminated in the sustainable time of overload, then open circuit distance protection III section is also returned step 2; Otherwise, wide area protection device excision overload circuit.
In said step 1, according to being electrically connected electrical network is carried out subregion, the union of each subregion should cover whole electrical network.
In said step 2, each subregion is installed 2 cover wide area protection devices, and is subsequent use each other.
In said step 2, the wide area protection device is gathered the magnitude of current and the switching value of circuit in the subregion.
In said step 5, protective device action in the subregion, the wide area protection device is delivered to stable device with switching value.
Under the normal condition or behind the failure removal; When needing only the line load electric current greater than setting value; Wide area protection just calculates the sustainable time of overload according to the thermally-stabilised limit of circuit, the distance protection III section of locking overload circuit, and overload information is sent to stable device.
What need statement is that content of the present invention and embodiment are intended to prove the practical application of technical scheme provided by the present invention, should not be construed as the qualification to protection range of the present invention.Those skilled in the art can do various modifications, be equal to replacement or improvement under spirit of the present invention and principle inspiration.But these changes or modification are all in the protection range that application is awaited the reply.
Claims (6)
1. a wide area protection and stable device control method for coordinating is characterized in that said method comprises the steps:
(1). according to being electrically connected electrical network is carried out subregion, electrical network is divided into several zones, the subregion number is decided according to the bar number of circuit in the electrical network, guarantees that each subregion number of lines is no more than 20;
(2). for each subregion, the wide area protection device is set, Monitoring Line electric current and switching value information;
(3). judge whether line protective devices start in the subregion,, otherwise carry out step 5 if start then carry out step 4;
(4) if. protective device does not start and line current during greater than setting value; The wide area protection device calculates the sustainable time of overload according to the thermally-stabilised limit of circuit; Overload information is sent to stable device, and while this circuit distance protection III section of locking also jumps to step 6;
(5). when protective device starts and the action outlet; Trip signal is sent to stable device; Behind the failure removal, electric current is during greater than setting value, and the wide area protection device calculates the sustainable time of overload according to the thermally-stabilised limit of circuit; This circuit distance protection of locking III section is sent to stable device with overload information;
(6). stable device takes to limit the overload measure, in the sustainable time of overload, eliminates circuit overload, if circuit overload is eliminated in the sustainable time of overload, then opens the circuit distance protection III section of locking before and returns step 2; Otherwise, wide area protection device excision overload circuit.
2. method according to claim 1 is characterized in that, in said step 1, according to being electrically connected electrical network is carried out subregion, and the union of each subregion should cover whole electrical network.
3. method according to claim 1 is characterized in that, in said step 2, each subregion is installed 2 cover wide area protection devices, and is subsequent use each other.
4. method according to claim 1 is characterized in that, in said step 2, the wide area protection device is gathered the magnitude of current and the switching value of circuit in the subregion.
5. method according to claim 1 is characterized in that, in said step 5, and protective device action in the subregion, the wide area protection device is delivered to stable device with switching value.
6. method according to claim 1; It is characterized in that; Under the normal condition or behind the failure removal, when needing only the line load electric current greater than setting value, wide area protection just calculates the sustainable time of overload according to the thermally-stabilised limit of circuit; The distance protection III section of locking overload circuit, and overload information is sent to stable device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210214460.5A CN102738779B (en) | 2012-06-26 | 2012-06-26 | Coordination control method of wide area protection and stabilization device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210214460.5A CN102738779B (en) | 2012-06-26 | 2012-06-26 | Coordination control method of wide area protection and stabilization device |
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| CN102738779A true CN102738779A (en) | 2012-10-17 |
| CN102738779B CN102738779B (en) | 2014-08-27 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102946090A (en) * | 2012-10-29 | 2013-02-27 | 中国电力科学研究院 | Power transmission line protection realizing method based on multi-dimensional information |
| CN106505533A (en) * | 2016-09-30 | 2017-03-15 | 许继集团有限公司 | A kind of distance protection system and its control method suitable for half-wave power transmission circuit |
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| US6694271B1 (en) * | 2001-10-29 | 2004-02-17 | The United States Of America As Represented By The Secretary Of The Navy | Integrated circuit breaker protection software |
| CN101335450A (en) * | 2008-03-21 | 2008-12-31 | 国电南瑞科技股份有限公司 | Adaptive regulating method for preventing overload mis-operation by distance protection |
| CN101964545A (en) * | 2010-10-19 | 2011-02-02 | 天津理工大学 | Self-adaptive intelligent coordination protection and control system for power grids based on WANs (Wide Area Network) and multiple agents |
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2012
- 2012-06-26 CN CN201210214460.5A patent/CN102738779B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6694271B1 (en) * | 2001-10-29 | 2004-02-17 | The United States Of America As Represented By The Secretary Of The Navy | Integrated circuit breaker protection software |
| CN101335450A (en) * | 2008-03-21 | 2008-12-31 | 国电南瑞科技股份有限公司 | Adaptive regulating method for preventing overload mis-operation by distance protection |
| CN101964545A (en) * | 2010-10-19 | 2011-02-02 | 天津理工大学 | Self-adaptive intelligent coordination protection and control system for power grids based on WANs (Wide Area Network) and multiple agents |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102946090A (en) * | 2012-10-29 | 2013-02-27 | 中国电力科学研究院 | Power transmission line protection realizing method based on multi-dimensional information |
| CN102946090B (en) * | 2012-10-29 | 2015-06-03 | 中国电力科学研究院 | Power transmission line protection realizing method based on multi-dimensional information |
| CN106505533A (en) * | 2016-09-30 | 2017-03-15 | 许继集团有限公司 | A kind of distance protection system and its control method suitable for half-wave power transmission circuit |
| CN106505533B (en) * | 2016-09-30 | 2018-12-04 | 许继集团有限公司 | A kind of distance protection system and its control method suitable for half-wave power transmission route |
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| CN102738779B (en) | 2014-08-27 |
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