Loop closing power supply switching control method, device and apparatus for distribution network

Abstract

The invention discloses a loop closing power supply switching control method for a distribution network. The method comprises firstly obtaining all loop closing power supply switching paths in a distribution network and interconnection switches corresponding to various loop closing power supply switching paths; determining a loop closing power supply switching path where a loop closing power flowcannot exceed a threshold after loop closing according to various interconnection switches; and deleting the loop closing power supply switching paths where the loop closing power flow exceeds the threshold after loop closing. It can be seen that the control method can realize a power supply switching loop closing operation according to the determined loop closing power supply switching path wherethe loop closing power flow cannot exceed the threshold after loop closing during distribution network maintenance or system failure, avoids a case that overloaded line or equipment causes protectiontrip-out because of overlarge loop closing power flow after the loop closing, avoids an operation mode of cutting off the power first and then achieving power supply switching, thereby reducing the number of power outages and improving the reliability of the power supply. In addition, the present invention also discloses a loop closing power supply switching control device and apparatus for a distribution network, having the above effect.

Description

technical field [0001] The invention relates to the technical field of electric power engineering, in particular to a control method, device and equipment for power distribution network closing and switching. Background technique [0002] At present, the 10kV power distribution network in cities in my country generally adopts ring network design and open-loop operation mode. With the development of urban power distribution networks in recent years, most 10kV lines have transferable power supply capabilities, and even multiple 10kV lines have transferable power supply capabilities. That is, when the distribution network is overhauled or the system fails, the load transfer can be realized through the ring closing operation to avoid power outages for users. However, due to the excessive flow of the ring closing after the ring closing, the circuit or equipment is overloaded or even the protection trips, resulting in a wider range of users. Power outages, therefore, make it more...

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Problems solved by technology

[0004] The embodiment of the present application provides a power supply control method, device and equipment for power distribution network closing loop to solve the problem of many power outages, long power outage time and low reliability of power supply for users in the prior art when the line is overhauled and the load is reversed. question

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