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Static reactive compensator and active power filter combined operation system and control method thereof

A technology of static reactive power compensation and power filter, applied in active power filtering, reactive power adjustment/elimination/compensation, flexible AC transmission system, etc. Effect

Inactive Publication Date: 2012-01-11
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with SVC, HAPF can only compensate reactive power with a fixed capacity, and does not have the ability of SVC to continuously adjust reactive power.

Method used

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  • Static reactive compensator and active power filter combined operation system and control method thereof
  • Static reactive compensator and active power filter combined operation system and control method thereof
  • Static reactive compensator and active power filter combined operation system and control method thereof

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Experimental program
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Embodiment Construction

[0025] see figure 1 , a kind of SVC and APF joint operation system of the present invention, adds the APF part of small capacity and control device in SVC system, wherein static var compensator SVC is made up of thyristor control reactor TCR and passive filter PPF, wherein The passive filter PPF is composed of capacitors in series with tuning inductance. The APF is connected in parallel with the fundamental resonance branch and then connected in series with the passive filter PPF in the static var compensator SVC to form an output terminal. The output terminal is connected to the control device In the DSP controller, the output ends of the DSP controller are respectively connected to the APF and the TCR through a driving circuit and an optical fiber. The combined operation system of SVC and APF not only has the basic functions of SVC, but also improves the filtering performance of the passive filter through the APF, suppresses the possible resonance phenomenon between the pass...

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Abstract

The invention discloses a joint operating system of the static var compensator and active power filter and the control method, which is characterized in that an active power filter and a control device are added in the static var compensator. The control method of balance compensation of three-phase unbalanced loads is used to realize the compensation of load negative sequence current and the technology of specific subharmonic compensation is used to realize the decoupling control of SVC and APF, so as to guarantee the safe and stable operation of the joint operating system. The invention notonly has the basic functions of the SVC, but also improves the filtering performance of the passive filter through APF, suppresses possible resonance phenomena between the passive component and the power grid equivalent impedance, and can realize dynamic management on subharmonic waves.

Description

technical field [0001] The invention relates to a combined operation system of a static var compensator (SVC) and an active power filter (APF) and a control method thereof. Background technique [0002] With the wide application of power electronic devices in industry, the problem of harmonic pollution of power grid is becoming more and more serious. In addition, many power users, such as electric arc furnaces, have severe voltage fluctuations, large negative sequence components, many high-order harmonics, and low power factor of the power grid due to their unique working characteristics. Therefore, increasing the power factor of the power grid, compensating the negative sequence current, and restraining the harmonic pollution have attracted more and more attention. [0003] It is an effective measure to improve power factor and suppress harmonic pollution by adopting power electronic devices to process reactive power nearby and absorb harmonic current generated by harmonic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/18H02J3/01
CPCY02E40/40Y02E40/22Y02E40/12Y02E40/10Y02E40/20
Inventor 罗安帅智康程莹孙贤大舒适李锋
Owner HUNAN UNIV
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