Topological power quality control system and control method thereof

Abstract

The invention provides a topological power quality control system. One end of a gird-connected interface in the system is connected to a single-phase power grid, and the other end thereof is connected with a control system to realize a function of real-time energy interaction with a grid system and meanwhile, provide an energy transfer channel and a voltage acquisition channel for the control system; an EMC filter is connected between a high-frequency filter reactor and the gird-connected interface to ensure electromagnetic compatibility between the inner portion of equipment and a distribution network system; the high-frequency filter reactor is connected in series between a main transformer loop and the EMC filter and is used for filtering higher harmonics generated when a high-frequency switching tube in the main transformer loop is subjected to high-frequency conversion; one end of a current transformer is fixedly connected to the live wire of the single-phase power grid, and the other end thereof is connected to the control system to realize a real-time monitoring function of load current of the distribution network; and one end of an IGBT drive and protection system is connected with the control system, and the other end thereof is connected with the main transformer loop. The system can realize automatic tracking compensation according to electric energy state of a user side, and has the advantages of fast dynamic response speed and convenient and quick installation and the like.

Description

technical field [0001] The invention belongs to the field of power quality management on the side of a distribution network in an electric power system, and specifically relates to a topological power quality management system and a control method thereof. Background technique [0002] With the continuous development of social economy and the continuous improvement of people's living standards, people's requirements for power quality are getting higher and higher. At present, in the low-voltage distribution network of relevant power systems, there is a high concern for low voltage at the user end. The measures for governance, related products, There are also many devices, and the overall solution technology is mature; however, less attention has been paid to the problem of high voltage at the user end. At present, there are basically no corresponding mature solutions and measures to solve the problem of substandard power quality in the distribution network field. According t...

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Problems solved by technology

At the same time, through parallel connection with the user side of the distribution network, real-time tracking, detection and compensation of reactive power and harmonics on the user side, to solve the problem of poor power quality on the line

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