CN106849056B - 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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- CN106849056B CN106849056B CN201611018306.5A CN201611018306A CN106849056B CN 106849056 B CN106849056 B CN 106849056B CN 201611018306 A CN201611018306 A CN 201611018306A CN 106849056 B CN106849056 B CN 106849056B
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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
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000005457 optimization Methods 0.000 abstract 1
- 238000007726 management method Methods 0.000 description 3
- 241001611138 Isma Species 0.000 description 2
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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 methods of cutting load under reduction forecast failure, belong to power system and automation technology.The present invention is directed to the overload or the out-of-limit problem of node voltage of equipment under forecast failure, calculates multiple failure incision load control system amounts.According to different load turning solution to the integrated performance index for reducing cutting load reduction amount under multiple failures, exclude the load transfer scheme that integrated performance index is negative, successively select the highest load transfer scheme of integrated performance index, 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 can provide optimization load transfer strategy for the state of emergency such as occurrence of equipment overload and voltage out-of-limit under forecast failure in power grid, to reduce cutting load risk, reduce electric power safety accident responsibility risk, improve the operation and management level of power grid.
Description
Technical field
The invention belongs to power system and automation technologies, more precisely, reduce in advance the present invention relates to a kind of
Think the load transfer policy searching method of cutting load under failure.
Background technique
Urgent cutting load is an important measures in China's electricity net safety stable defense technique system, by tight in power grid
Implementing cutting load under anxious state can solve the stable problems such as generator rotor angle, voltage, frequency and overload.The 599th command " electric power of State Council
Security incident response disposition and regulations of investigating " (hereinafter referred to as " regulations "), specify that stabilized control system cutting load is equal to event
Barrier loss load, when surely control cutting load causes partial electric grid loss load that can equally trigger " regulations " when reaching certain proportion.Cause
On the one hand this should reinforce stabilized control system management and distribute rationally, identify configuration under the premise of ensureing power network safety operation
Stabilized control system bring risk, on the other hand to the not high state of emergency of some control time requirements, actively seek bodyfixed frame,
Load loss is reduced under the premise of guaranteeing power grid security.
For realizing the power grid of layering and zoning operation already, the load transfer of by stages move be undoubtedly power grid be in warning/
One of the quick of system security and stability, effective means are improved under the state of emergency.It can guarantee the reliable of power supply to the full extent
Property, reduce load loss.The method that the country generallys use at present is, the by stages 220kV be equipped with one or more solution circling points and
Spare service channel when accident occurs in some subregion, is unlikely to influence other subregions, and can phase between different subregions
It mutually supports, while also the load transfer just between subregion provides condition.
Summary of the invention
Object of the present invention is to: in order to reduce cutting load amount after grid collapses, reduces or eliminates and solved by cutting load
Overload and bring electric power safety accident responsibility when the problems such as voltage out-of-limit provide a kind of bearing for cutting load under reduction forecast failure
Lotus turns for policy searching method.
Specifically, the present invention adopts the following technical solutions realize, comprising the following steps:
1) the load transfer scheme that can be performed based on online mode data validation, remembers the total of executable load transfer scheme
Number is that M then turns to step 10), otherwise turn to step 2 such as M=0；
2) simulation analysis is carried out for forecast failure table, and judges whether occur overloading or voltage out-of-limit is asked under institute is faulty
Topic, if not occurring, turns to step 10), if occurring, turns to step 3)；
3) note leads to that overloading occurs in power grid or the sum of the forecast failure of voltage out-of-limit problem is K, and for these anticipations
Failure, be successively calculated as solving the problems, such as each causing power grid occur overloading or the forecast failure of voltage out-of-limit under the existing state of emergency
Required cutting load measure amount, meter wherein thekCutting load amount needed for a forecast failure is；
4) it for M executable load transfer scheme, successively calculates after executing each load transfer scheme, solution is each led
Send a telegraph net occur overloading or the forecast accident of voltage out-of-limit problem under cutting load measure amount needed for the existing state of emergency, meter is wherein
ThekA forecast failure is takingmRequired cutting load amount is under a load transfer scheme；
5) each load transfer scheme is successively calculated to the performance indicator for reducing cutting load by formula (1):
(1)
Wherein,It ismA load transfer scheme is to the performance indicator for reducing cutting load；
6) M load transfer scheme is sorted from large to small according to the performance indicator for reducing cutting load, is successively denoted as the 1st
Load transfer scheme, the 2nd load transfer scheme ..., M load transfer scheme；It, will be square online if the initial value of cyclic variable H is 1
Formula data are denoted as the method for operation 0；
7) it on the basis of method of operation H-1, is adjusted according to H load transfer scheme ways of carrying out, forms new operation side
Formula, and be denoted as method of operation H, and be based on which causes power grid to occur overloading or the forecast failure of voltage out-of-limit problem to K
Scene carries out simulation analysis；
8) judge all K cause power grid occur overloading or the forecast failure of voltage out-of-limit problem under with the presence or absence of overload or
Voltage out-of-limit problem turns to step 10) if not occurring, if occurring, enables H=H+1, turns to step 9)；
9) judge H load transfer scheme reduce cutting load performance indicator whether be greater than zero and whether at the same meet H < M+
1, if the two meets simultaneously, turn to step 7)；Otherwise, step 10) is turned to；
10) terminate this method.
Beneficial effects of the present invention are as follows: the 599th command of State Council specifies that stabilized control system cutting load is equal to failure damage
Lose load, region cutting load ratio is excessively high or load distribution it is unreasonable will lead to even more serious incident classification grading and
It calls to account afterwards.And the present invention reduces the performance indicator of cutting load according to load transfer scheme, reduces forecast failure incision load.
To reduce failure incision load, electric power safety accident responsibility risk is reduced, the operation and management level of power grid is improved.
Detailed description of the invention
Fig. 1 is the flow chart of the method for the present invention.
Specific embodiment
Present invention is further described in detail in conjunction with the embodiments with reference to the accompanying drawings.
Step 1 describes in Fig. 1, and based on the load transfer scheme that online mode data validation can be performed, note is executable
The sum of load transfer scheme be M, if load transfer scheme is zero, turn to step 10, terminate to calculate.Otherwise step is turned to
2。
Step 2 describes in Fig. 1, according to pre-set forecast failure table, carries out simulation calculation, and according to simulation analysis
As a result, judging that system causes system to occur overloading or voltage out-of-limit problem 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 describes in Fig. 1, for causing the power grid to occur overloading or voltage out-of-limit problemKA forecast failure, according to
It is secondary be calculated as solving the problems, such as each causing power grid occur overloading or the forecast failure of voltage out-of-limit under needed for the existing state of emergency
Cutting load measure amount, meter wherein thekCutting load amount needed for a forecast failure is。
Step 4 describes in Fig. 1, for M executable load transfer scheme, successively calculates and executes each load turn
After scheme, solve the problems, such as each to cause power grid occur overloading or the forecast accident of voltage out-of-limit under needed for the existing state of emergency
Cutting load measure amount, meter wherein thekA forecast failure is takingmRequired cutting load amount is under a load transfer scheme。
Step 5 describes in Fig. 1, successively calculates each load transfer scheme to the property for reducing cutting load by formula (1)
Energy index:
(1)
Wherein,It ismA load transfer scheme is to the performance indicator for reducing cutting load.
Step 6 describes in Fig. 1, by M load transfer scheme according to reduce cutting load performance indicator from greatly to
Small sequence, be successively denoted as the 1st load transfer scheme, the 2nd load transfer scheme ..., M load transfer scheme；If cyclic variable H
Initial value be 1, online mode data are denoted as the method for operation 0.
Step 7 describes in Fig. 1, on the basis of method of operation H-1, according to H load transfer scheme ways of carrying out tune
It is whole, the new method of operation is formed, and be denoted as method of operation H, and be based on which, causes power grid to occur overloading or voltage K
The forecast failure scene of out-of-limit problem carries out simulation analysis.
Step 8 describes in Fig. 1, judge all K cause power grid occur overloading or the anticipation of voltage out-of-limit problem therefore
Barrier is lower with the presence or absence of overload or voltage out-of-limit problem, if not, turning to step 10, terminates search.If so, enabling H=H+1, step is turned to
Rapid 9.
Step 9 describes in Fig. 1, judges whether the performance indicator of H load transfer scheme reduction cutting load is greater than zero
And whether meet H < M+1 simultaneously, if the two meets simultaneously, show to turn to there is also other turning solutions for reducing cutting load
Step 7；Otherwise, step 10 is turned to.
Step 10 describes in Fig. 1, when system without cutting load or passes through load transfer measure under forecast failure
Without cutting load or play the role of reduce cutting load load transfer scheme be finished after, terminate search for.
From the description above as can be seen that the present embodiment can in power grid under forecast failure occurrence of equipment overload and voltage
The out-of-limit state of emergency provides the load transfer strategy for reducing cutting load, to reduce cutting load measure amount, reduces electric power safety thing
Therefore liability exposure, improve the operation and management level of power grid.
Although the present invention has been described by way of example and in terms of the preferred embodiments, embodiment is not for the purpose of limiting the invention.Not
It is detached from the spirit and scope of the present invention, any equivalent change or retouch done also belongs to the protection scope of the present invention.Cause
This protection scope of the present invention should be based on the content defined in the claims of this application.
Claims (1)
1. a kind of load transfer policy searching method for reducing cutting load under forecast failure, which comprises the following steps:
1) the load transfer scheme that can be performed based on online mode data validation, remembers that the sum of executable load transfer scheme is
M turns to step 10) if M=0, otherwise turns to step 2)；
2) simulation analysis is carried out for forecast failure table, and judges whether to occur overloading under institute is faulty or voltage out-of-limit problem,
If not occurring, step 10) is turned to, if occurring, turns to step 3)；
3) note leads to that overloading occurs in power grid or the sum of the forecast failure of voltage out-of-limit problem is K, and is directed to these forecast failures,
Successively be calculated as solving the problems, such as each causing power grid occur overloading or the forecast failure of voltage out-of-limit under existing state of emergency institute
The cutting load measure amount needed, cutting load amount needed for counting wherein k-th of forecast failure are PL,k(k=1 ... K)；
4) it for M executable load transfer scheme, successively calculates after executing each load transfer scheme, solution each causes
Power grid occur overloading or the forecast accident of voltage out-of-limit problem under cutting load measure amount needed for the existing state of emergency, meter is wherein
K-th of forecast failure cutting load amount required in the case where taking m-th of load transfer scheme is PL,km(k=1 ... K)；
5) each load transfer scheme is successively calculated to the performance indicator for reducing cutting load by formula (1):
Wherein, εmIt is m-th of load transfer scheme to the performance indicator for reducing cutting load；
6) M load transfer scheme is sorted from large to small according to the performance indicator for reducing cutting load, is successively denoted as the 1st load
Turning solution, the 2nd load transfer scheme ..., M load transfer scheme；If the initial value of cyclic variable H is 1, by online mode number
According to being denoted as the method for operation 0；
7) it on the basis of method of operation H-1, is adjusted according to H load transfer scheme ways of carrying out, forms the new method of operation, and
It is denoted as method of operation H, and is based on which, cause power grid to occur overloading or the forecast failure scene of voltage out-of-limit problem to K
Carry out simulation analysis；
8) judge all K cause power grid occur overloading or the forecast failure of voltage out-of-limit problem under with the presence or absence of overload or voltage
More restricted problem turns to step 10) if not occurring, if occurring, enables H=H+1, turns to step 9)；
9) judge H load transfer scheme reduce cutting load performance indicator whether be greater than zero and whether at the same meet H < M+1, if
The two meets simultaneously, then turns to step 7)；Otherwise, step 10) is turned to；
10) terminate this method.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107910879B (en) * | 2017-11-10 | 2019-11-26 | 大连理工大学 | A kind of active frequency response events control strategy |
| 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 |
| 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 |
| CN112952844B (en) * | 2021-05-14 | 2021-07-20 | 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 |
| 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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| 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 |
| CN104835077A (en) * | 2015-04-14 | 2015-08-12 | 国网上海市电力公司 | Static safety analysis system with dispatcher accident prediction supporting function |
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| JP6168061B2 (en) * | 2012-09-12 | 2017-07-26 | 日本電気株式会社 | Power management method, power management apparatus and program |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN104835077A (en) * | 2015-04-14 | 2015-08-12 | 国网上海市电力公司 | Static safety analysis system with dispatcher accident prediction supporting function |
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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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