Power supply restoration method for power distribution network based on intelligent soft switch

Abstract

Provided is a power supply restoration method for a power distribution network based on an intelligent soft switch. The method comprises: according to a selected power distribution system, inputting a connection relationship among a line parameter, a load level, and a network topology, a system operating voltage level and branch current limit, an intelligent soft switch access position, capacity and loss coefficient, a system fault location, and a reference voltage and a reference power initial value; according to a provided power distribution system structure and parameter, establishing a mathematic model of power supply restoration for the power distribution network based on the intelligent soft switch, including: setting a maximum power supply restoration active load as an objective function, and taking into account the system load flow constraints, operating voltage constraints, branch current constraints and intelligent soft-switching operation constraints; solving the obtained mathematical model by using a primal-dual interior point method; outputting solve results: an objective function value, a voltage amplitude and a phase angle of each node, a restoration load coefficient of each node, and an intelligent soft switch transmission power value. The method provided by the present invention avoids the hidden danger caused by switch operations, is more safe and reliable, and comprehensively improves the self-healing ability of the power distribution network fault.

Description

technical field [0001] The invention relates to a power supply recovery method of a distribution network. In particular, it relates to a power supply restoration method for distribution network based on intelligent soft switching. Background technique [0002] As a part of the power system that directly faces users, the distribution network has the closest connection with users and the most direct impact on users. Compared with the traditional distribution network, the smart distribution network has changed from the original single power distribution role to a new power exchange system integrating power collection, transmission, storage and distribution. Not only will the primary side use distributed power sources and energy storage devices And DFACTS and other equipment to meet the operating needs of the system, and advanced distribution automation technology will be used on the secondary side to improve the information communication capability and intelligence level of th...

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Problems solved by technology

Therefore, there is an urgent need for a distribution network power supply restoration method based on intelligent soft switching to s

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