CN106849056A - The load transfer policy searching method of cutting load under a kind of reduction forecast failure - Google Patents
The load transfer policy searching method of cutting load under a kind of reduction forecast failure Download PDFInfo
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- CN106849056A CN106849056A CN201611018306.5A CN201611018306A CN106849056A CN 106849056 A CN106849056 A CN 106849056A CN 201611018306 A CN201611018306 A CN 201611018306A CN 106849056 A CN106849056 A CN 106849056A
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- 238000004088 simulation Methods 0.000 claims description 7
- 238000004458 analytical method Methods 0.000 claims description 6
- 125000004122 cyclic group Chemical group 0.000 claims description 3
- 238000013502 data validation Methods 0.000 claims description 3
- 238000005457 optimization Methods 0.000 abstract 1
- 238000007726 management method Methods 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
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- 238000004364 calculation method Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/007—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
- H02J3/0073—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources for providing alternative feeding paths between load and source when the main path fails, e.g. transformers, busbars
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Abstract
The invention discloses a kind of load transfer policy searching method of cutting load under reduction forecast failure, belong to Power System and its Automation technical field.The present invention calculates multiple failure incision spatial load forecasting amounts for the overload or the out-of-limit problem of node voltage of equipment under forecast failure.According to different load turning solution to reducing the integrated performance index of cutting load decrement under multiple failures, it is negative load transfer scheme to exclude integrated performance index, integrated performance index highest load transfer scheme is selected successively, can check solve the problems, such as to need cutting load under forecast failure, until being finished without cutting load or load transfer measure.The present invention, so as to reduce cutting load risk, can reduce electric power safety accident responsibility risk, the operation and management level of raising power network for forecast failure issues generating apparatus overload and the state of emergency such as voltage out-of-limit provides optimization load transfer strategy in power network.
Description
Technical field
The invention belongs to Power System and its Automation technical field, more precisely, reduced the present invention relates to one kind pre-
Think the load transfer policy searching method of cutting load under failure.
Background technology
Urgent cutting load is an important measures in China's electricity net safety stable defense technique system, by tight in power network
Implementing cutting load under anxious state can solve the stable problems such as generator rotor angle, voltage, frequency and overload.The command of State Council the 599th《Electric power
Security incident response is disposed and regulations of investigating》（Hereinafter referred to as《Regulations》）, specify that stabilized control system cutting load is equal to event
Barrier loss load, can equally trigger when steady control cutting load causes partial electric grid to lose when load reaches certain proportion《Regulations》.Cause
This, on the premise of power network safety operation is ensured, on the one hand should strengthen stabilized control system management and distribute rationally, recognize configuration
The risk that stabilized control system brings, on the other hand to the less demanding state of emergency of some control times, actively seek bodyfixed frame,
Load loss is reduced on the premise of power grid security is ensured.
For realizing the power network that layering and zoning is run already, the load transfer of by stages move be undoubtedly power network be in warning/
One of the quick of system security and stability, effective means are improved under the state of emergency.The reliability of power supply can to the full extent be ensured
Property, reduce load loss.The method that generally uses of the country is at present, 220kV by stages be provided with one or more solution circling points and
Standby service channel, when there is accident in some subregion, being unlikely to influence can phase between other subregions, and different subregions
Mutually support, while also just for the load transfer between subregion provides condition.
The content of the invention
The present invention seeks to：In order to reduce cutting load amount after grid collapses, reduce or eliminate solving by cutting load
Overload and the electric power safety accident responsibility brought when the problems such as voltage out-of-limit, are given and a kind of reduce bearing for cutting load under forecast failure
Lotus turns to supply policy searching method.
Specifically, the present invention is realized using following technical scheme, is comprised the following steps：
1）Based on the load transfer scheme that online mode data validation can perform, the sum of the executable load transfer scheme of note is
M, such as M=0, then turn to step 10）, otherwise turn to step 2）；
2）Simulation analysis are carried out for forecast failure table, and judge overload or voltage out-of-limit problem whether occur under institute is faulty,
If not occurring, step 10 is turned to）If occurring, step 3 is turned to）；
3）Note causes the sum that the forecast failure of overload or voltage out-of-limit problem occurs in power network to be K, and for these forecast failures,
It is calculated as solving the problems, such as each resulting in power network successively and the state of emergency institute existed under the forecast failure of overload or voltage out-of-limit occurs
The cutting load measure amount for needing, meter wherein thekCutting load amount needed for individual forecast failure is；
4）For M executable load transfer scheme, calculate successively after performing each load transfer scheme, solve to each result in
There is the cutting load measure amount needed for the state of emergency that exists under the forecast accident of overload or voltage out-of-limit problem in power network, and meter is wherein
ThekIndividual forecast failure is takingmRequired cutting load amount is under individual load transfer scheme；
5）By formula（1）Each load transfer scheme is calculated successively to reducing the performance indications of cutting load：
（1）
Wherein,It ismPerformance indications of the individual load transfer scheme to reduction cutting load；
6）M load transfer scheme is sorted from big to small according to the performance indications for reducing cutting load, the 1st load is designated as successively
Turning solution, the 2nd load transfer scheme ..., M load transfer schemes；If the initial value of cyclic variable H is 1, by online mode number
According to being designated as the method for operation 0；
7）On the basis of method of operation H-1, adjusted according to H load transfer schemes ways of carrying out, form the new method of operation, and
Method of operation H is designated as, and based on which, the forecast failure scene for causing power network overload or voltage out-of-limit problem occur to K
Carry out simulation analysis；
8）Judge to whether there is overload or voltage under all K forecast failures for causing power network overload or voltage out-of-limit problem occur
More restricted problem, if not occurring, turns to step 10）If occurring, H=H+1 is made, turn to step 9）；
9）Judge that whether whether H load transfers scheme reduces the performance indications of cutting load more than zero and while meeting H<M+1, if
Both meet simultaneously, then turn to step 7)；Otherwise, step 10 is turned to）；
10）Terminate this method.
Beneficial effects of the present invention are as follows：The command of State Council the 599th specify that stabilized control system cutting load is equal to failure damage
Lose load, region cutting load ratio is too high or load distribution it is unreasonable can cause even more serious incident classification grade and
Call to account afterwards.And the present invention reduces the performance indications of cutting load according to load transfer scheme, forecast failure incision load is reduced.
So as to reduce failure incision load, electric power safety accident responsibility risk is reduced, improve the operation and management level of power network.
Brief description of the drawings
Fig. 1 is the flow chart of the inventive method.
Specific embodiment
The present invention is described in further detail in conjunction with the embodiments with reference to the accompanying drawings.
Step 1 is described in Fig. 1, and based on the load transfer scheme that online mode data validation can perform, note is executable
Load transfer scheme sum be M, if load transfer scheme is zero, turn to step 10, terminate calculate.Otherwise turn to step
2。
Step 2 is described in Fig. 1, according to the forecast failure table for pre-setting, carries out simulation calculation, and according to simulation analysis
As a result, judgement system causes system overload or voltage out-of-limit problem occur with the presence or absence of forecast failure.If nothing, step 10 is turned to,
Terminate to calculate；If so, showing there is the demand for carrying out load transfer, step 3 is turned to.
Step 3 is described in Fig. 1, overload or voltage out-of-limit problem occurs for power network is causedKIndividual forecast failure, according to
It is secondary to be calculated as solving the problems, such as each resulting in needed for the state of emergency existed under the forecast failure of overload or voltage out-of-limit occurs in power network
Cutting load measure amount, meter wherein thekCutting load amount needed for individual forecast failure is。
Step 4 is described in Fig. 1, for M executable load transfer scheme, calculates perform each load turn successively
After supplier's case, solve the problems, such as to each result in needed for the state of emergency existed under the forecast accident of overload or voltage out-of-limit occurs in power network
Cutting load measure amount, meter wherein thekIndividual forecast failure is takingmRequired cutting load amount is under individual load transfer scheme。
Step 5 is described in Fig. 1, by formula（1）Each load transfer scheme is calculated successively to reducing the property of cutting load
Can index：
（1）
Wherein,It ismPerformance indications of the individual load transfer scheme to reduction cutting load.
Step 6 is described in Fig. 1, by M load transfer scheme according to reduce cutting load performance indications from greatly to
Small sequence, be designated as successively the 1st load transfer scheme, the 2nd load transfer scheme ..., M load transfer schemes；If cyclic variable H
Initial value be 1, online mode data are designated as the method for operation 0.
Step 7 is described in Fig. 1, on the basis of method of operation H-1, is adjusted according to H load transfer schemes ways of carrying out
It is whole, the new method of operation is formed, and method of operation H is designated as, and based on which, cause power network overload or voltage occur to K
The forecast failure scene of out-of-limit problem carries out simulation analysis.
Step 8 is described in Fig. 1, judges all K anticipation events for causing power network overload or voltage out-of-limit problem occur
Barrier is lower with the presence or absence of overload or voltage out-of-limit problem, such as no, turns to step 10, terminates search.In this way, H=H+1 is made, step is turned to
Rapid 9.
Step 9 is described in Fig. 1, judges that whether H load transfers scheme reduces the performance indications of cutting load more than zero
And whether meet H simultaneously<M+1, if both meet simultaneously, shows also reduce the turning solution of cutting load in the presence of other, turns to
Step 7；Otherwise, step 10 is turned to.
Step 10 is described in Fig. 1, when system under forecast failure without cutting load or by load transfer measure
Without cutting load or play reduce cutting load effect load transfer scheme be finished after, terminate search.
From the description above as can be seen that the present embodiment can overload and voltage to issue generating apparatus in forecast failure in power network
The out-of-limit state of emergency provides the load transfer strategy for reducing cutting load, so as to reduce cutting load measure amount, reduces electric power safety thing
Therefore liability exposure, improve the operation and management level of power network.
Although the present invention is disclosed as above with preferred embodiment, embodiment is not of the invention for limiting.Not
Depart from the spirit and scope of the present invention, any equivalence changes done or retouching also belong to the protection domain of the present invention.Cause
The content that this protection scope of the present invention should be defined with claims hereof is as standard.
Claims (1)
1. it is a kind of reduce forecast failure under cutting load load transfer policy searching method, it is characterised in that comprise the following steps：
1）Based on the load transfer scheme that online mode data validation can perform, the sum of the executable load transfer scheme of note is
M, such as M=0, then turn to step 10）, otherwise turn to step 2）；
2）Simulation analysis are carried out for forecast failure table, and judge overload or voltage out-of-limit problem whether occur under institute is faulty,
If not occurring, step 10 is turned to）If occurring, step 3 is turned to）；
3）Note causes the sum that the forecast failure of overload or voltage out-of-limit problem occurs in power network to be K, and for these forecast failures,
It is calculated as solving the problems, such as each resulting in power network successively and the state of emergency institute existed under the forecast failure of overload or voltage out-of-limit occurs
The cutting load measure amount for needing, meter wherein thekCutting load amount needed for individual forecast failure is；
4）For M executable load transfer scheme, calculate successively after performing each load transfer scheme, solve to each result in
There is the cutting load measure amount needed for the state of emergency that exists under the forecast accident of overload or voltage out-of-limit problem in power network, and meter is wherein
ThekIndividual forecast failure is takingmRequired cutting load amount is under individual load transfer scheme；
5）By formula（1）Each load transfer scheme is calculated successively to reducing the performance indications of cutting load：
（1）
Wherein,It ismPerformance indications of the individual load transfer scheme to reduction cutting load；
6）M load transfer scheme is sorted from big to small according to the performance indications for reducing cutting load, the 1st load is designated as successively
Turning solution, the 2nd load transfer scheme ..., M load transfer schemes；If the initial value of cyclic variable H is 1, by online mode number
According to being designated as the method for operation 0；
7）On the basis of method of operation H-1, adjusted according to H load transfer schemes ways of carrying out, form the new method of operation, and
Method of operation H is designated as, and based on which, the forecast failure scene for causing power network overload or voltage out-of-limit problem occur to K
Carry out simulation analysis；
8）Judge to whether there is overload or voltage under all K forecast failures for causing power network overload or voltage out-of-limit problem occur
More restricted problem, if not occurring, turns to step 10）If occurring, H=H+1 is made, turn to step 9）；
9）Judge that whether whether H load transfers scheme reduces the performance indications of cutting load more than zero and while meeting H<M+1, if
Both meet simultaneously, then turn to step 7)；Otherwise, step 10 is turned to）；
10）Terminate this method.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107910879A (en) * | 2017-11-10 | 2018-04-13 | 大连理工大学 | A kind of active frequency response events control strategy |
| CN109768544A (en) * | 2018-12-21 | 2019-05-17 | 中国电力科学研究院有限公司 | Area power grid load transfer method |
| CN109787224A (en) * | 2019-01-23 | 2019-05-21 | 中国电力科学研究院有限公司 | Method for generating regional power grid load transfer strategy for preventing cascading overload |
| CN112952844A (en) * | 2021-05-14 | 2021-06-11 | 国网浙江省电力有限公司金华供电公司 | Load adjusting method under power grid out-of-limit working condition |
| CN116961012A (en) * | 2023-09-21 | 2023-10-27 | 国网吉林省电力有限公司松原供电公司 | Controllable load switch identification method and system based on shortest path search out-of-limit equipment |
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| US20150229128A1 (en) * | 2012-09-12 | 2015-08-13 | Nec Corporation | Method of managing electric power, power management device, and program |
| CN103427445A (en) * | 2013-05-28 | 2013-12-04 | 华东电网有限公司 | Thermal power load shedding peak shaving method based on load reconstruction strategy |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107910879A (en) * | 2017-11-10 | 2018-04-13 | 大连理工大学 | A kind of active frequency response events control strategy |
| CN107910879B (en) * | 2017-11-10 | 2019-11-26 | 大连理工大学 | A kind of active frequency response events control strategy |
| CN109768544A (en) * | 2018-12-21 | 2019-05-17 | 中国电力科学研究院有限公司 | Area power grid load transfer method |
| CN109768544B (en) * | 2018-12-21 | 2021-11-16 | 中国电力科学研究院有限公司 | Regional power grid load transfer method |
| CN109787224A (en) * | 2019-01-23 | 2019-05-21 | 中国电力科学研究院有限公司 | Method for generating regional power grid load transfer strategy for preventing cascading overload |
| CN109787224B (en) * | 2019-01-23 | 2022-05-13 | 中国电力科学研究院有限公司 | Method for generating regional power grid load transfer strategy for preventing cascading overload |
| CN112952844A (en) * | 2021-05-14 | 2021-06-11 | 国网浙江省电力有限公司金华供电公司 | Load adjusting method under power grid out-of-limit working condition |
| CN116961012A (en) * | 2023-09-21 | 2023-10-27 | 国网吉林省电力有限公司松原供电公司 | Controllable load switch identification method and system based on shortest path search out-of-limit equipment |
| CN116961012B (en) * | 2023-09-21 | 2024-01-16 | 国网吉林省电力有限公司松原供电公司 | Controllable load switch identification method and system based on shortest path search out-of-limit equipment |
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Address after: 510620 No.2, Tianhe south 2nd Road, Guangzhou, Guangdong Patentee after: GUANGZHOU POWER SUPPLY Co.,Ltd. Patentee after: NARI TECHNOLOGY Co.,Ltd. Patentee after: NARI Group Corp. Address before: 510620 No.2, Tianhe south 2nd Road, Guangzhou, Guangdong Patentee before: GUANGZHOU POWER SUPPLY Co.,Ltd. Patentee before: NARI TECHNOLOGY Co.,Ltd. Patentee before: NANJING NARI Group Corp. |
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Effective date of registration: 20231020 Address after: 510620, No. two, No. 2, Tianhe South Road, Guangzhou, Guangdong, Tianhe District Patentee after: Guangzhou Power Supply Bureau of Guangdong Power Grid Co.,Ltd. Patentee after: NARI TECHNOLOGY Co.,Ltd. Patentee after: NARI Group Corp. Address before: 510620 No.2, Tianhe south 2nd Road, Guangzhou, Guangdong Patentee before: GUANGZHOU POWER SUPPLY Co.,Ltd. Patentee before: NARI TECHNOLOGY Co.,Ltd. Patentee before: NARI Group Corp. |
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