System and method for realizing terminal compensation and harmonic suppression by using dynamic capacitor

Abstract

The invention relates to a system and method for realizing terminal compensation and harmonic suppression by using a dynamic capacitor in a power grid. Harmonic detection and suppression are carried out on a voltage transformer and a current transformer in a terminal; analog signals of all phases of voltages and currents are collected from electrical equipment; a management center carries out processing and calculation on the analog signals to convert the analog signals into digital signals and then carries out separation of all subharmonic component data in a grid, and transmits the voltages, currents, and harmonic data to an internet-of-things gateway and a server center by the internet of things to carry out data interaction; the management center controls a harmonic suppression module based on analysis result to suppress odd harmonics from the third times to the seventeenth times; and an intelligent dynamic capacitor can carry out reactive compensation automatically according to a reactive power change of electrical equipment. According to the system for realizing terminal compensation and harmonic suppression by using a dynamic capacitor, grid harmonic detection and suppression as well as reactive power compensation in a factory distribution system are realized based on the internet of things in a certain electrical area, and the great economic benefits and research value can be created.

Description

technical field [0001] The invention relates to a system and a method for realizing terminal compensation and harmonic suppression by using dynamic capacitance in a power grid. It is a grid harmonic detection and suppression system based on the Internet of Things, and is mainly used in the local harmonic suppression of electrical equipment in the power grid and reactive power compensation. Background technique [0002] With the development of science and technology, the level of industrial production and the improvement of people's living standards, a large number of non-linear electrical equipment is used in the power grid, causing the harmonic components of the power grid to account for an increasing proportion. It not only increases the power supply loss of the power grid, but also interferes with the normal operation of the protection devices and automation devices of the power grid, causing malfunction and refusal of these devices, directly threatening the safe operatio...

AI Technical Summary

Problems solved by technology

[0005] These methods focus on eliminating the harmonics in the power grid, the equipment is relatively heavy, the maintenance is inconvenient, and the elimination effect on the place where the harmonics are generated is not obvious

Does not solve the harmonic problem from the root

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