Reliability evaluation method for active power distribution network based on switch boundary subarea division

Abstract

The invention provides a reliability evaluation method for an active power distribution network based on switch boundary subarea division. The reliability evaluation method comprises dividing the area containing the active power distribution network into nine subareas according to the installation positions of switches; according to reliability calculating expressions corresponding to different fault subareas, calculating the duration of power interruption, which is caused by a fault point corresponding to a feeder line of a fault, of a load point, the calculation comprising: calculating the interruption fault rate and interruption duration of the fault point in areas without power supply of a distributed power source, and calculating the interruption fault rate and interruption duration of the fault point in areas with power supply of the distributed power source; and measuring system reliability through calculating annual fault interruption rate and annual average interruption time of the load point, specially, measuring system reliability by adopting a system average interruption frequency index SAIFI and a system average interruption duration index SAIDI. The method of the invention reduces analysis amount, can accurately evaluate reliability of the power distribution network containing a distributed power source and provides reliability evaluation basis for development of Chinese active power distribution networks in the future.

Description

technical field [0001] The invention relates to a method for evaluating the reliability of an active power distribution network. In particular, it relates to a method for evaluating the reliability of active distribution networks based on switch boundary partitions for urban distribution network planning work of public institutions. Background technique [0002] As the link between end users and power generation and transmission systems, power distribution system is an important link to ensure safe and reliable power supply for users. With the rapid popularization of distributed power access in power distribution system, distributed power has brought various influences to power distribution system with its own characteristics, and at the same time, it will also change the original theory of reliability evaluation of power distribution system. with method. Since users can obtain power from both traditional power sources and distributed power sources at the same time, the fa...

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Problems solved by technology

In a power distribution system containing multiple distributed power sources, in order to f

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