Power supply reliability evaluation method based on sequential Monte Carlo simulation method

Abstract

The invention discloses a power supply reliability evaluation method based on a sequential Monte Carlo simulation method. The method comprises the following steps: constructing blocks according to a blocking algorithm, and carrying out block reliability parameter calculation; carrying out partitioning algorithm improvement; combining the improved partitioning algorithm with a sequential Monte Carlo simulation method to form a new reliability algorithm; and carrying out single fault simulation and system simulation based on a power supply reliability algorithm of an improved block-sequential Monte Carlo method. According to the technical scheme, the partitioning algorithm is improved, the partitioning connection matrix is defined, the fault influence range is determined by searching the non-zero elements in the partitioning connection matrix, the fault enumeration is carried out by taking the blocks as units instead of elements, the fault enumeration frequency is reduced, the fault enumeration time is shortened, and the fault enumeration efficiency is improved. Compared with a traditional method for determining the fault range by searching switch elements, the method is more convenient, repeated searching of the switch elements is not needed, the single fault searching time is saved, the calculation speed is improved, and when the system is more complex and the elements are more, the advantages of the partitioning algorithm are more obvious.

Description

technical field [0001] The invention relates to the technical field of power supply of a distribution network, in particular to a power supply reliability evaluation method based on a sequential Monte Carlo simulation method. Background technique [0002] With the improvement of users' requirements for power supply quality, the reliability of power distribution system has been paid more and more attention by people. Due to the numerous components and complex scale of the power distribution system, it is difficult to analyze the reliability of the power distribution system by using the analytical method alone, while the simulation method has the problem of long calculation time. To find a balance point in calculation accuracy, it is urgent to find a fast and effective calculation method. [0003] At present, many literatures are devoted to dealing with the contradiction between calculation speed and accuracy. From the existing research, the speed and accuracy of the algorith...

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Problems solved by technology

[0008] The present invention mainly solves the technical problem that due to the large number of components and complex scale of the power distribution system, the original analysis method is difficult to analyze the reliability of the power distribution system, and the simulation method takes a long time to calculate the technical problem, and provides a method based on sequential Monte Carlo The power supply reliability evaluation method of the simulation method improves the block algorithm, defines the block connection matrix, determines the fault influence range by searching the non-zero elements in the block connection matrix, replaces the component with the block as the unit for fault enumeration, and reduces faults The number of enumerations reduces the time of fault enumeration, and at each enumeration, only the non-zero elements in the row corresponding to the fault block in the block connection matrix can be searched to determine the fault influence range. When searching for non-zero elements At the same time, it can also determine the fault type of the corresponding fault range. Compared with the traditional method, it is more convenient and faster to determine the fault range by searching the switching elements, and it does not need to search the switching elements repeatedly, which saves the single fault search time and improves the calculation speed. When the system is more complex , the more components there are, the more obvious the advantages of the block algorithm

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