A method and device for flexible interconnection of power distribution ring network based on magnetic control adjustable reactor

Abstract

The invention discloses a method and device for flexible interconnection of a power distribution ring network based on a magnetically controlled adjustable reactor, belonging to the field of active control of the power distribution ring network. The method includes: connecting the primary side of the magnetic control adjustable reactor with double windings in parallel between two feeders of the distribution network; changing the equivalent impedance of the primary side of the magnetic control adjustable reactor to realize the flexible combination between the two feeders environment, steady-state power flow regulation, new energy consumption and transient load transfer. The present invention can effectively reduce the amplitude of the ring-closing impact current under the condition of a certain ring-closing voltage difference, realize flexible ring-closing, and avoid excessively high ring-closing impact current. The present invention is based on the topological structure of the magnetic flux control adjustable reactor, and through different internal control strategies, it can respectively realize the steady-state power flow regulation and the power distribution ring network regulation and control function of improving the new energy consumption capacity. The invention realizes the uninterrupted power supply of the feeder load on the fault side by controlling the primary side winding of the reactor to enter a near-short-circuit state.

Description

technical field [0001] The invention belongs to the field of active regulation and control of a distribution ring network, and more specifically relates to a method and device for flexible interconnection of a distribution network based on a magnetically controlled adjustable reactor. Background technique [0002] As the main energy used in modern society, electric energy is widely used in all walks of life. The distribution network belongs to the end of the power system and is directly connected to the users. Therefore, the quality of the distribution network directly affects the user's satisfaction with the power system. With the continuous development of the distribution network, users' requirements for power supply reliability continue to increase. For example, the stringent requirements of some high-end manufacturing equipment and some important agencies for uninterrupted power supply have brought severe challenges to the distribution network; due to different feeder li...

AI Technical Summary

Problems solved by technology

The contact switch is a kind of traditional mechanical switch, which only has two states of on and off, so it can only realize simple interconnection and disconnection between two feeders, and the control ability is limited. It can only ensure that the load does not interrupt the power supply when one end of the power supply is out of operation. Therefore, it is impossible to actively control the power exchange between feeders, and it is impossible to solve a series of problems such as loop closing impact current, feeder load balance, and new energy consumption.

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