Electric power quality treatment device

Abstract

The invention discloses an electric power quality treatment device which comprises a sampling module which is used for acquiring a voltage signal and a current signal; a first operational module which acquires harmonic current by means of the current signal; a second operational module which performs separation for obtaining each sequence component of unbalance current by means of the current signal; a third operational module which is used for calculating a reactive power shortage value by means of a voltage phase and a current phase; a control module which is used for obtaining a compensation solution and generating a control signal by means of the harmonic current and / or each sequence component and / or reactive power; and a power module which is used for compensating the voltage signal and / or the current signal by means of the control signal. Obviously, according to the electric power quality treatment device, the voltage signal and the current signal are analyzed through the operational modules for obtaining each analysis result; then a compensation solution is generated by the control module; and the power module finally finishes electric power quality treatment on a power grid by means of the compensation solution. The electric power quality treatment device realizes electric power quality treatment and saves investment cost of a user.

Description

technical field [0001] The invention relates to the field of grid power supply, in particular to a power quality control device. Background technique [0002] Due to the increase in the number of various non-linear power loads and the increase in the capacity of single-phase loads and three-phase unbalanced loads in the power grid, the quality of the current power grid is getting lower and lower. In modern power systems, unbalanced three-phase and voltage waveform distortion caused by harmonics have become the most important power quality problems. There are more and more solutions to the above problems, including various active / passive filters, reactive power compensation devices, and three-phase unbalance compensation devices. The fundamental principle is to use modern power electronics technology to dynamically / statically compensate various factors affecting the power grid. [0003] With the increasingly prominent power quality problems, the demand for power quality pro...

AI Technical Summary

Problems solved by technology

In the field of high power, although there are single power quality products, such as SVG (Static Var Generator, static var generator), APF (Active power filter, active power filter), three-phase unbalance control device, but the power grid Rarely only one kind of problem will occur, and more harmonics, reactive components, and three-phase unbalance will exist to varying degrees. Therefore, to solve all problems at the same time, it is necessary to purchase three kinds of power quality control devices at the same time, and the cost Higher, so it is urgent to carry out technological innovation, optimize the design of power quality control products, and reduce costs

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