CN105429113A - Method for determining protection priority of each component in wide-area protection communication system - Google Patents
Method for determining protection priority of each component in wide-area protection communication system Download PDFInfo
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- CN105429113A CN105429113A CN201510777218.2A CN201510777218A CN105429113A CN 105429113 A CN105429113 A CN 105429113A CN 201510777218 A CN201510777218 A CN 201510777218A CN 105429113 A CN105429113 A CN 105429113A
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- protection
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/04—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
- H02H7/226—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices for wires or cables, e.g. heating wires
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The invention discloses a method for determining a protection priority of each component in a wide-area protection communication system. The method comprises: for the importance and reliability of each component in the wide-area protection communication system and incorrect action situations of corresponding protection, performing protection priority division on each component of a local layer with a weight distribution and threshold setting method to determine the protection priority of each component. According to the method for determining the protection priority of each component in the wide-area protection communication system, provided by the invention, the superior performance of wide-area protection is exerted more perfectly, a very good solution is proposed for the problem that information congestion possibly occurs when the wide-area protection communication system has a fault, and the wide-area protection is facilitated to make a more accurate and quicker judgment for taking measures in time to ensure the system to run safely and stably.
Description
Technical field
The present invention relates to the wide area protection communications field, especially a kind of method determining each element protection priority in wide area protection communication system.
Background technology
In the face of increasingly sophisticated electric network composition, it is not enough with sensitivity that traditional protection has exposed protection seting difficulty, is difficult to the problems such as cooperation between protection, is subject to extensive concern by the fault element identification of multiple spot information and the wide area backup protection of tripping operation decision-making.Existing wide area protection, center protection is far away relative to guard space in station, and scope is wide, and by information-theoretical regard, the information of acquisition is more much more detailed, and utilize the redundancy of information, system survivability is stronger.Equally, if control centre can obtain the In situ Measurement information of each transformer station, fault location can be carried out more accurately undoubtedly.But; so also band is served problem: existing wide area protection communication system substation access communication network limited bandwidth; be generally n × 2Mbit/s (general n=1 ~ 8); much smaller relative to ethernet communication bandwidth in 100Mbit/s station; mass data collects in certain decision point; policy of Central Government unit will be made likely to meet with " dimension calamity " problem; communication network is caused to paralyse; meanwhile; excessive time delay and the packet loss causing communication of traffic load, by unavailable for the wide area protection high to part delay requirement.
For the problem of this respect, also there is many research both at home and abroad.The communication service proposed with regard to elements all in the transformer station of stratum is had to be divided into five classes and the scheme according to priority uploaded according to attribute, but the whole network sampled value or phasor value are divided into same priority by such mode, the pressure of corresponding information stream for communication network cannot be alleviated.Also have and propose a kind of wide area backup protection new algorithm compared based on false voltage; the measured value of circuit side voltage, current failure component is utilized to calculate opposite side voltage failure component; and detect reduction Wide-area Measurement Information transmission quantity by fault zone, but this method does not give full play to the advantage of wide area the whole network information.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of method determining each element protection priority in wide area protection communication system; given play to the superior function of wide area protection more perfectly; the problem that congestion information may occur in case of a failure to wide area protection communication system proposes good solution; be conducive to wide area protection to make and judging more quickly and accurately; take measures in time, ensure system safety stable operation.
For solving the problems of the technologies described above; the technical solution adopted in the present invention is: a kind of method determining each element protection priority in wide area protection communication system; the method is: for the incorrect operation situation of the importance of element self each in wide area protection communication system, the degree of reliability and corresponding protection; adopt and divide carrying out protection priority with regard to each element in stratum with the method arranging threshold value to distribute weights, thus determine each element protection priority.
Each element is circuit, bus and transformer.
For circuit, get himself failure rate f
l, on-load grade h and corresponding protection thereof incorrect operation rate u
1and whether be the priority protection rank that intersite line Link gives at central core to divide this element as evaluation index.
For bus, get himself failure rate f
b, with regard to stratum protection incorrect operation rate u
band whether have special bus protection u with regard to stratum
pbas division protection priority level index.
For transformer, get transformer capacity size r
t, faults itself rate f
tand the incorrect operation rate u of corresponding protection
tprotection priority indicator is divided as it.
For the weights that the different target setting of each element is different, be provided with different threshold values according to the difference that each element satisfies condition, element is divided into other protection of different priorities by the threshold value namely met according to element correspondence.
A kind of method determining each element protection priority in wide area protection communication system provided by the invention, given play to the superior function of wide area protection more perfectly, the problem that congestion information may occur in case of a failure to wide area protection communication system proposes good solution, be conducive to wide area protection to make and judging more quickly and accurately, take measures in time, ensure system safety stable operation; No matter when communicating unimpeded or congested, it is short that the scheme every business time delay of according to priority not uploaded by protection information adopting the present invention to propose all uploads time delay than traditional scheme.Constantly go expanding communication bandwidth to solve traffic congestion problem and not only waste resource and bandwidth also can not get sufficient utilization; the technical program not only can solve the long correspondence protection of the information delay caused due to traffic congestion can not the action excision fault of fast and reliable, and make use of bandwidth conservation cost fully.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described:
Fig. 1 is for adopting conventional method to compare schematic diagram with the inventive method time delay under normal circumstances in generation;
Fig. 2 for adopt traditional scheme to compare schematic diagram with the inventive method time delay in the situation of breaking down.
Embodiment
Embodiment one
A kind of method determining each element protection priority in wide area protection communication system; the method is: for the incorrect operation situation of the importance of element self each in wide area protection communication system, the degree of reliability and corresponding protection; adopt and divide carrying out protection priority with regard to each element in stratum with the method arranging threshold value to distribute weights, thus determine each element protection priority.
Each element is circuit, bus and transformer.
For circuit, get himself failure rate f
l, on-load grade h and corresponding protection thereof incorrect operation rate u
1and whether be the priority protection rank that intersite line Link gives at central core to divide this element as evaluation index.
For bus, get himself failure rate f
b, with regard to stratum protection incorrect operation rate u
band whether have special bus protection u with regard to stratum
pbas division protection priority level index.
For transformer, get transformer capacity size r
t, faults itself rate f
tand the incorrect operation rate u of corresponding protection
tprotection priority indicator is divided as it.
For the weights that the different target setting of each element is different, be provided with different threshold values according to the difference that each element satisfies condition, element is divided into other protection of different priorities by the threshold value namely met according to element correspondence.
Get f respectively
l0, f
b0, f
t0for the mean failure rate probability of all circuits, bus, transformer in the transformer station of counter element place, if element self probability is greater than the failure rate of provided as one homogeneous element in station, place, then judge that this element needs priority protection; Get u respectively
l0, u
b0, u
t0for the average incorrect operation rate of all route protections, bus protection, tranformer protection in the transformer station of counter element place; if the protection incorrect operation rate that element is corresponding is greater than the incorrect operation rate of the protection that in station, place, provided as one homogeneous element is corresponding, then judge that this element needs priority protection.Element faults itself rate and this two classes condition of element correspondence protection incorrect operation rate are all of equal importance, and therefore corresponding weights are also the same, all get 0.5 here.
In addition, for circuit, if with the feeder line (h≤2) of important load (one-level or two stage loads), then judge that this feeder line gives priority protection; If this circuit is intersite line (Link), due to the importance of intersite line, then directly give other protection of high priority, relative to meeting, other conditions are important, therefore these weights are set to 1, and other weights are set to 0.5.
For bus, if be not provided with special bus protection (u with regard to stratum
pb), then judge that this bus needs priority protection.This condition and element failure rate and protect incorrect operation rate of equal importance, therefore weights are equally set to 0.5.
For transformer, if its capacity r
tbe greater than other transformer capacity r in station, place
t0, then this transformer also should give priority protection.This condition is set to 0.5 equally.
Be provided with different threshold values according to the difference that each element satisfies condition, element is divided into other protection of different priorities by the threshold value namely met according to element correspondence.
For circuit as in table 1 (a),
Table 1 (a) circuit priority protection weight table
| Evaluation index | Priority protection | Subloop Protect |
| f l>f l0(L 1) | 0.5 | 0 |
| u 1>u l0(L 2) | 0.5 | 0 |
| h l≤2(L 3) | 0.5 | 0 |
| Link(L 4) | 1 | 0 |
If threshold value is T
l, T
l=L
1+ L
2+ L
3+ L
4.
Work as T
lwhen>=1.5, then the rank that circuit gives priority protection at central core is A;
As 0.5≤T
lduring <1.5, then the rank of circuit priority protection is B;
Work as T
lduring <0.5, then circuit priority protection rank is C.
In table 1 (b),
Table 1 (b) bus priority protection weight table
| Evaluation index | Priority protection | Subloop Protect |
| f b>f b0(B 1) | 0.5 | 0 |
| u b>u b0(B 2) | 0.5 | 0 |
| u pb(B 3) | 0.5 | 0 |
Set threshold value as Tb, T equally
b=B1+B2+B3.
When Tb >=1, then the rank that bus gives priority protection at central core is A;
As 0.5≤Tb<1, then the rank of bus priority protection is B;
As Tb<0.5, then the rank of bus priority protection is C.
In table 1 (c),
Table 1 (c) transformer priority protection weight table
| Evaluation index | Priority protection | Subloop Protect |
| r t>r t0(T 1) | 0.5 | 0 |
| f t>f t0(T 2) | 0.5 | 0 |
| u t>u t0(T 3) | 0.5 | 0 |
Set threshold value as T equally
t, T
t=T
1+ T
2+ T
3.
Work as T
twhen>=1, then the rank that this transformer gives priority protection at central core is A;
As 0.5≤T
tduring <1, then the rank that this transformer gives priority protection at central core is B;
Work as T
tduring <0.5, then the rank that this transformer gives priority protection at central core is C.
Embodiment two
OPNET platform is built wide area protection model of communication system, makes a concrete analysis of using the transformer station of a 110KV as one of them substation, this transformer station comprises 2 110KV inlet wire L
1and L
2, 2 110KV transformer baies are every (T
aand T
b), a 110KV bus (B
110KV), a 35KV bus (B
35KV), a 10KV bus (B
10KV), two 35KV feeder line (F
1and F
2), 6 10KV feeder line (F
3~ F
8).According to the method described above element in station is carried out classification.Emulation adopts two kinds of different modes to upload protection information respectively under two kinds of different communication conditions, and communication delay under comparing two kinds of methods.
Fig. 1 illustrates under non-failure conditions, adopts in two ways, obviously can find out that the inventive method is more obvious than conventional method time delay much short, and for the element of different situation, wide area protection can give other protection of different priorities.Even if breaking down in communication flows surge situation, as seen from Figure 2, this programme time delay is still being significantly shorter than traditional scheme.To wide area protection when communicating by when occurring congested, provide good solution.No matter when communicating unimpeded or congested, scheme every business time delay of according to priority not uploaded by protection information in this paper is adopted all to upload time delay than traditional scheme short.Constantly go expanding communication bandwidth to solve traffic congestion problem and not only waste resource and bandwidth also can not get sufficient utilization; this scheme not only can solve the long correspondence protection of the information delay caused due to traffic congestion can not the action excision fault of fast and reliable, and make use of bandwidth conservation cost fully.
Claims (6)
1. determine the method for each element protection priority in wide area protection communication system for one kind; it is characterized in that the method is: for the incorrect operation situation of the importance of element self each in wide area protection communication system, the degree of reliability and corresponding protection; adopt and divide carrying out protection priority with regard to each element in stratum with the method arranging threshold value to distribute weights, thus determine each element protection priority.
2. a kind of method determining each element protection priority in wide area protection communication system according to claim 1, is characterized in that: each element is circuit, bus and transformer.
3. a kind of method determining each element protection priority in wide area protection communication system according to claim 2, is characterized in that: for circuit, gets himself failure rate f
l, on-load grade h and corresponding protection thereof incorrect operation rate u
1and whether be the priority protection rank that intersite line Link gives at central core to divide this element as evaluation index.
4. a kind of method determining each element protection priority in wide area protection communication system according to claim 2, is characterized in that: for bus, gets himself failure rate f
b, with regard to stratum protection incorrect operation rate u
band whether have special bus protection u with regard to stratum
pbas division protection priority level index.
5. a kind of method determining each element protection priority in wide area protection communication system according to claim 2, is characterized in that: for transformer, gets transformer capacity size r
t, faults itself rate f
tand the incorrect operation rate u of corresponding protection
tprotection priority indicator is divided as it.
6. a kind of method determining each element protection priority in wide area protection communication system according to claim 1; it is characterized in that: for the weights that the different target setting of each element is different; be provided with different threshold values according to the difference that each element satisfies condition, element is divided into other protection of different priorities by the threshold value namely met according to element correspondence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510777218.2A CN105429113B (en) | 2015-11-13 | 2015-11-13 | A kind of method for determining each element protection priority in wide area protection communication system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510777218.2A CN105429113B (en) | 2015-11-13 | 2015-11-13 | A kind of method for determining each element protection priority in wide area protection communication system |
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|---|---|
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| CN105429113B CN105429113B (en) | 2017-09-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110568315A (en) * | 2019-10-09 | 2019-12-13 | 国网宁夏电力有限公司 | Bus fault probability calculation method based on running state abnormal information |
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|---|---|---|---|---|
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2015
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| CN101916990A (en) * | 2010-08-18 | 2010-12-15 | 华北电力科学研究院有限责任公司 | Optimized check method of short-circuit current limiting measure |
| CN102395212A (en) * | 2011-11-18 | 2012-03-28 | 百度在线网络技术（北京）有限公司 | Gateway access control method, system and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110568315A (en) * | 2019-10-09 | 2019-12-13 | 国网宁夏电力有限公司 | Bus fault probability calculation method based on running state abnormal information |
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Inventor after: Weng Hanli Inventor after: Pan Mei Inventor after: Lin Xiangning Inventor after: Huang Jingguang Inventor after: Yang Guowen Inventor after: Zheng Tao Inventor after: Li Zhenxing Inventor before: Pan Mei Inventor before: Yang Guowen Inventor before: Zheng Tao |