CN108631298B - Unit distribution power grid recovery strategy generation method based on load balanced distribution - Google Patents
Unit distribution power grid recovery strategy generation method based on load balanced distribution Download PDFInfo
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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
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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
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Abstract
The invention discloses a load balance distribution-based unit distribution power grid recovery strategy generation method, which comprises the following steps of 1: the system starts to carry out fault recovery; step 2: searching a matched fault recovery scheme through an expert database matching algorithm; and step 3: automatically generating a recovery processing strategy of load balancing distribution by a key path method; and 4, step 4: calculating the reliability weighted value and the operation optimization weighted value of all the recovery strategies generated by the algorithm, comparing the weighted scoring result of the optimal recovery strategy, and confirming the optimal executable strategy of the current fault recovery; and 5: and starting to execute the optimal strategy, and storing the rest strategies into a database as a standby scheme according to the weighted grading sorting result. The invention improves the optimization high-efficiency performance of the operation of the power distribution network, thereby fundamentally improving the reliability of power supply and improving the satisfaction degree of users.
Description
Technical Field
The invention relates to a recovery strategy generation method for a unit distribution power grid based on load balanced distribution, and belongs to the technical field of power distribution networks.
Background
The safe and reliable operation of the power distribution network is directly related to social production and life of people, and once the power distribution network fails, great inconvenience is brought to the life of people. With the increasing automation degree of the power distribution network, the development of power distribution network fault recovery is an important guarantee for improving the safety and the economy of the power distribution network and is also an important component of power distribution automation.
At present, the power distribution network fault recovery technology mainly adopts a traditional load rate comparison mode to carry out optimization recovery. However, due to the reasons of different load types and different load grades of power distribution network users, the power distribution network power supply restoration strategy is increasingly complex at present, and the original processing mode cannot meet the power supply requirement of the existing power distribution network.
Disclosure of Invention
The purpose is as follows: in order to overcome the defects in the prior art, the invention provides a unit-made power grid restoration strategy generation method based on load balancing distribution.
The technical scheme is as follows: in order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a unit distribution power grid recovery strategy generation method based on load balanced distribution comprises the following steps:
step 1: the system starts to carry out fault recovery;
step 2: searching a matched fault recovery scheme through an expert database matching algorithm;
and step 3: automatically generating a recovery processing strategy of load balancing distribution by a key path method;
and 4, step 4: calculating the reliability weighted value and the operation optimization weighted value of all the recovery strategies generated by the algorithm, comparing the weighted scoring result of the optimal recovery strategy, and confirming the optimal executable strategy of the current fault recovery;
and 5: starting to execute the optimal strategy, and storing the rest strategies into a database as a standby scheme according to the weighted grading sorting result;
step 6: judging whether the strategy is successfully executed, if not, automatically generating a reliable recovery strategy under the condition of keeping the running mode of the currently operated part of equipment, and executing the strategy;
and 7: and successfully executing the processing strategy, completing fault recovery processing, forming a fault processing report, and recording all information for post-accident analysis and expert base upgrading.
Preferably, the step 2 comprises the following steps:
2.1: generating an expert database, performing full-cycle rehearsal analysis on the conventional operation mode and the abnormal operation mode of the unit power distribution network, and storing the optimized and restored patterned processing strategies obtained by all the rehearsal analysis results in different operation modes into the expert database for matching search when a fault occurs;
2.2: matching search, wherein a data fuzzy matching method is adopted, and the matching method comprises operation data matching, fault type matching and section mode matching, so that the accuracy of fault matching is ensured;
2.3: after matching search is completed, checking whether expert database processing logic meeting conditions exists or not, and if yes, acquiring an expert database optimization processing strategy and adding the expert database optimization processing strategy into an optimal strategy comparison queue; and if the expert database processing logic is not available, abandoning the expert database strategy.
Preferably, the data of the operation mode is derived from actual data of system operation and assists in adding a theoretical calculation value as a compensation mode of abnormal conditions.
As a preferred scheme, the automatic strategy generation in step 3 is generated by adopting a power distribution network fault recovery strategy automatic generation method based on a critical path method.
As a preferable scheme, the reliability weighted value in step 4 considers the power supply load rate after the factor is supplied; the multi-power nature of all multi-power loads on the circuit after the power transfer comprises detecting whether the multi-power loads still have the multi-power and whether the multi-power nature is reliable like a station, a same bus and a same feeder; the reliability of the operation of the switch is transferred, and the reliability comprises whether the switch is controllable or not and the success rate of remote control; the properties of the transfer power supply comprise: a main grid power supply, a distributed power supply; the reliability of the transfer power supply comprises the failure rate of the transfer power supply and the failure rate of the transfer line; the nature of the transferred load and the weather influence factor.
Preferably, the operation optimization weighted value in step 4 takes into account factors of cable route loss analysis and load distribution balance.
Has the advantages that: the invention provides a load balance distribution-based unit distribution power grid recovery strategy generation method, which makes full use of the management advantages of a unit system mode on a power distribution network model and provides the load balance distribution-based unit distribution power grid recovery strategy generation method. Therefore, the automatic generation method of the power supply restoration optimization strategy of the unit preparation power grid based on load balanced distribution improves the optimization efficiency of the operation of the power distribution network on the basis of ensuring safety and stability, thereby fundamentally improving the reliability of power supply and improving the satisfaction degree of users.
Drawings
FIG. 1 is a flow chart of the method of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
The load balance distribution-based automatic generation method for the power supply restoration optimization strategy of the unit preparation power grid adopts a processing mode combining patterning and an automatic strategy, and automatically identifies a fault restoration processing mode to meet the power supply requirement.
The method comprises the steps that a patterned processing strategy in an automatic generation method of a power supply recovery optimization strategy of a unit distribution power grid based on load balanced distribution is stored in an expert database for matching search when a fault occurs, wherein the patterned processing strategy is obtained by performing preview analysis on an operation mode of the unit distribution power grid, and the optimized and recovered patterned processing strategy is optimized; and the automatic strategy generation adopts a key path method to automatically generate a recovery processing strategy of load balancing distribution.
The automatic identification of the fault recovery processing mode in the automatic generation method of the power supply recovery optimization strategy of the unit distribution power grid based on load balancing distribution refers to that when a fault occurs, a recovery strategy which accords with the current fault processing in an expert database is searched through an expert database matching algorithm, the recovery strategy of load balancing distribution is automatically generated through a key path method, a reliability weighted value and an operation optimization weighted value are respectively calculated for the two strategies, the optimal recovery strategy is compared, and the current fault recovery executable strategy is confirmed.
In the automatic generation method of the power supply restoration optimization strategy of the unit distribution power grid based on load balanced distribution, factors such as the power supply load rate after the factors are supplied, the multi-power property of all multi-power loads on a circuit after the factors are supplied (whether the multi-power loads still have multi-power sources and whether the multi-power property is reliable like a station, a same bus, a same feeder and the like is detected), the reliability of the operation of a transfer switch (whether the switch is controllable, factors such as the success rate of remote control and the like), the properties of the transfer power supply (a main power supply, a distributed power supply and the like) and the reliability (the failure rate of the transfer power supply and the transfer circuit), the properties of the transfer load and the like are considered by a reliability weighted value; the operation optimization weighted value takes main factors such as cable route loss analysis, load distribution balance degree and the like into consideration.
In the automatic generation method of the power supply restoration optimization strategy of the unit distribution power grid based on load balancing distribution, the unit distribution network is adopted, and the amount of equipment in the unit is small, so that complex search of the restoration strategy, analysis and calculation of high-level application and the like are possible, and the problem of non-convergence does not exist. The calculation time is fast, the calculation time can be ignored in the whole processing logic, and the high-efficiency requirement of the fault processing of the power distribution network is met.
In the aspect of final strategy execution, if operation strategy execution fails, a reliable fault recovery strategy is automatically generated on the basis of the current operation mode of part of equipment already operated. The processing mode can avoid repeated on-off operation of the switch and ensure the performance of the equipment. In the part of automatically generating the reliable recovery strategy, a rapid strategy generation algorithm is adopted, and the recovery strategy can be safely and stably executed.
As shown in fig. 1, a method for generating a recovery strategy of a unit distribution power grid based on load balancing distribution includes the following specific steps:
step 1: the system begins to fail over.
Step 2: searching for a matching fault recovery scheme through an expert database matching algorithm.
The expert database generation is that full-cycle rehearsal analysis is carried out on the conventional operation mode and the abnormal operation mode of the unit power distribution network (operation mode data is derived from system operation actual data and assists in adding a theoretical calculation value as a completion mode of abnormal conditions), and all rehearsal analysis results are stored in the expert database for matching search when faults occur according to optimized recovery processing strategies in different operation modes.
The matching search adopts various fuzzy matching methods of data such as running data matching, fault type matching, section mode matching and the like, and the accuracy of fault matching is ensured.
And after the matching search is completed, checking whether the expert database processing logic meeting the conditions exists, and if so, acquiring an expert database optimization processing strategy and adding the expert database optimization processing strategy into an optimal strategy comparison queue (the expert database strategy is adopted to perform processing verification and fine adjustment on the strategy in the current operation mode, so that the feasibility of the processing strategy is ensured). And if the expert database processing logic is not available, abandoning the expert database strategy.
And step 3: and automatically generating a recovery processing strategy for load balancing distribution by a key path method.
The automatic strategy generation adopts a power distribution network fault recovery strategy automatic generation method based on a key path method, and the method has the characteristics of calculation convergence and high operation speed. When the unit is adopted to prepare the network model, the calculation dimensionality is greatly reduced due to the independence of the units in the model design, the calculation time is further shortened, and the calculation accuracy is improved.
And 4, step 4: and calculating the reliability weighted value and the operation optimization weighted value of all the recovery strategies generated by the algorithm, comparing the weighted scoring result of the optimal recovery strategy, and confirming the optimal executable strategy of the current fault recovery.
The reliability weighted value considers factors such as the power load rate after the factor is switched, the multi-power property of all multi-power loads on a circuit after the factor is switched (whether the multi-power loads still have multi-power is detected, whether the property of the multi-power is reliable like a station, a same bus, a same feeder line and the like), the reliability of the operation of a switch, whether the switch is controllable, the success rate of remote control and the like, the property of a switched power source (a main power grid, a distributed power supply and the like) and the reliability (the fault rate of the switched power source and the switched power line), the property of the switched power load, the weather influence factor and the like; the operation optimization weighted value takes main factors such as cable route loss analysis, load distribution balance degree and the like into consideration.
And 5: and starting to execute the optimal strategy, and storing the rest strategies into a database as a standby scheme according to the weighted grading sorting result.
Step 6: and judging whether the strategy is successfully executed, if not, automatically generating a reliable recovery strategy under the condition of keeping the running mode of the currently operated part of equipment, and executing the strategy.
The invention particularly emphasizes the preservation of the operation mode of the currently operated part of equipment, and mainly aims to reduce the switching-on and switching-off times of a switch in a short time and ensure the reliability of the equipment. Therefore, after the switching operation fails, the original generated standby processing strategy is not adopted at the first time, although the standby processing measurement speed is high, the repeated switching-on and switching-off problem of the switch can exist, particularly the large-range load transfer under the condition of large-area power failure exists, and due to the fact that the number of the operation switches is large, the repeated work of the number of the switching operations is less, and the failure recovery can be completed earlier. In addition, the original generated standby strategy may cause the problem of expansion of the unrecoverable area. The strategy is quickly supplemented on the basis of the original execution steps by adopting a quick automatic strategy generation mode, and the strategy is not subjected to complex mathematical operation, so that the real-time requirement can be met by the strategy generation, in addition, the recovered area is not repeatedly operated, the unrecoverable area can be minimized, the repeated power failure to a user can be reduced, and the user satisfaction is improved.
And 7: and successfully executing the processing strategy, completing fault recovery processing, forming a fault processing report, and recording all information for post-accident analysis and expert base upgrading.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (1)
1. A unit distribution power grid recovery strategy generation method based on load balanced distribution is characterized by comprising the following steps: the method comprises the following steps:
step 1: the system starts to carry out fault recovery;
step 2: searching a matched fault recovery scheme through an expert database matching algorithm;
the step 2 comprises the following steps:
2.1: generating an expert database, performing full-cycle rehearsal analysis on the conventional operation mode and the abnormal operation mode of the unit power distribution network, and storing the optimized and restored patterned processing strategies obtained by all the rehearsal analysis results in different operation modes into the expert database for matching search when a fault occurs;
2.2: matching search, wherein a data fuzzy matching method is adopted, and the matching method comprises operation data matching, fault type matching and section mode matching, so that the accuracy of fault matching is ensured;
2.3: after matching search is completed, checking whether expert database processing logic meeting conditions exists or not, and if yes, acquiring an expert database optimization processing strategy and adding the expert database optimization processing strategy into an optimal strategy comparison queue; if the expert database processing logic is not provided, the expert database strategy is abandoned;
the data of the operation mode is derived from the actual data of the system operation and assists in adding a theoretical calculation value as a completion mode of the abnormal condition;
and step 3: automatically generating a recovery processing strategy of load balancing distribution by a key path method;
the automatic strategy generation in the step 3 adopts a power distribution network fault recovery strategy automatic generation method based on a key path method;
and 4, step 4: calculating the reliability weighted value and the operation optimization weighted value of all the recovery strategies generated by the algorithm, comparing the weighted scoring result of the optimal recovery strategy, and confirming the optimal executable strategy of the current fault recovery;
in the step 4, the reliability weighted value considers the power supply load rate after the factor is supplied; the multi-power nature of all multi-power loads on the circuit after the power supply is transferred comprises detecting whether the multi-power loads still have the multi-power and whether the multi-power nature is reliable or not; the reliability of the operation of the switch is transferred, and the reliability comprises whether the switch is controllable or not and the success rate of remote control; the properties of the transfer power supply comprise: a main grid power supply, a distributed power supply; the reliability of the transfer power supply comprises the failure rate of the transfer power supply and the failure rate of the transfer line; the nature of the transferred load and the factors influenced by weather;
in the step 4, the operation optimization weighted value takes the factors of the loss analysis of the wired route and the load distribution balance degree into consideration;
and 5: starting to execute the optimal strategy, and storing the rest strategies into a database as a standby scheme according to the weighted grading sorting result;
step 6: judging whether the strategy is successfully executed, if not, automatically generating a reliable recovery strategy under the condition of keeping the running mode of the currently operated part of equipment, and executing the strategy;
and 7: and successfully executing the processing strategy, completing fault recovery processing, forming a fault processing report, and recording all information for post-accident analysis and expert base upgrading.
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| CN112491050A (en) * | 2020-12-04 | 2021-03-12 | 国网浙江省电力有限公司金华供电公司 | Main and distribution network accident recovery processing method based on index set weight |
| CN112865090B (en) * | 2021-01-30 | 2023-09-26 | 上海电力大学 | Intelligent power distribution network fault recovery method based on organism immune mechanism |
| CN114266364A (en) * | 2021-11-24 | 2022-04-01 | 国网北京市电力公司 | Power grid fault processing method and device and computer readable storage medium |
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| CN105048460A (en) * | 2015-08-26 | 2015-11-11 | 云南电网有限责任公司电力科学研究院 | Power supply recovery method adopting heuristic search algorithm and fuzzy comprehensive judgment for power distribution grid |
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