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Novel hybrid power active filter method

A hybrid, passive filter technology that is applied in active power filtering and AC networks to reduce harmonics/ripples, etc., to achieve the effects of strong adaptability to harmonic environments, convenient configuration, and flexible control

Inactive Publication Date: 2019-03-08
STATE GRID TIANJIN ELECTRIC POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art, propose a novel hybrid power active filter method, and solve the problem of harmonic control in complex harmonic environments

Method used

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Embodiment Construction

[0021] Embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0022] A novel hybrid power active filtering method, comprising the following steps:

[0023] Step 1. Establish as figure 1 The new hybrid power active filter circuit shown, the new hybrid power active filter circuit includes a 7-time passive filter 1, a three-phase inverter bridge circuit 2, a DSP control circuit 3, the 7-time passive filter The device 1 and the DSP control circuit 3 are connected with the three-phase inverter bridge circuit 2 through the drive module. The specific circuit connection relationship is:

[0024] The 7th order passive filter consists of a series connection of L a 、C a , in series with L b 、C b and series L c 、C c form, in series with the L a 、C a , in series with L b 、C b and series L c 、C c One end is respectively connected to three-phase power supply u a , u b , u c , and the other end is connec...

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Abstract

The invention relates to a novel hybrid power active filter method, which comprises the following steps: a 7-pass passive filter, a three-phase inverter bridge circuit, a DSP control circuit, a three-phase power supply and a load are connected together to form a novel hybrid power active filter circuit; an ADC module digitally converts and transfers the three-phase voltage, the load side current,the filter side three-phase current, and the power side three-phase current to the DSP module; the FPGA module outputs a control signal to the ADC module and the DSP module after performing phase lockon the power side three-phase voltage; and the DSP control circuit outputs six PWM signals to the three-phase inverter bridge circuit. The method is reasonable in design, adopts the instantaneous reactive power theory to extract harmonic current signals, and has the characteristics of flexible control, convenient configuration and strong adaptability to harmonic environment.

Description

technical field [0001] The invention belongs to the technical field of electric power active filters, in particular to a novel hybrid electric power active filter method. Background technique [0002] With the continuous development of power electronics technology and a large number of applications of a large number of nonlinear loads in the power system, the problem of harmonic pollution in the power grid is becoming more and more serious, and there are many nonlinear loads (such as intermediate frequency furnaces, etc.) whose harmonic spectrum is very complicated, so , it is very necessary to carry out comprehensive management. However, the current active filter technology has poor adaptability and cannot effectively solve the problem of harmonic control in complex harmonic environments. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art, propose a novel hybrid power active filtering method, and solve...

Claims

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Application Information

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IPC IPC(8): H02J3/01
CPCH02J3/01Y02E40/20
Inventor 霍现旭姚宗强赵长伟杨得博张少杰张慧颖刘春玲张学博刘伟李广敏郑文兵周明杰柴涛赵村骈睿珺胡文然李树鹏王旭东杨朝雯李刚姜亮
Owner STATE GRID TIANJIN ELECTRIC POWER