Electric power quality treatment device

A power quality and sequence component technology, applied in circuit devices, harmonic reduction devices, electrical components, etc., can solve the problems of harmonics, reactive components, three-phase unbalance, and high cost

Inactive Publication Date: 2017-07-18
重庆大全泰来电气有限公司
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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-

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Embodiment Construction

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0027] The embodiment of the present invention discloses a power quality control device, see figure 1 As shown, the device includes:

[0028] The sampling module 11 is used to acquire grid voltage signals and current signals.

[0029] Specifically, the sampling module 11 respectively collects voltage signals and current signals of the three phases of the power grid from the three phases of the power grid, and sends the voltage signals and current signals to t...

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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...

Claims

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Application Information

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IPC IPC(8): H02J3/01H02J3/26H02J3/18
CPCH02J3/01H02J3/1821H02J3/26Y02E40/30Y02E40/40Y02E40/50
Inventor 王清华石磊薛胜
Owner 重庆大全泰来电气有限公司
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