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

A technology of static var compensation and power filter, applied in active power filtering, reactive power adjustment/elimination/compensation, flexible AC transmission system, etc., can solve problems such as not having SVC, and achieve the goal of filtering harmonics Effect

Inactive Publication Date: 2008-05-21
HUNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with SVC, HAPF can only compensate reactive power with 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] Referring to Fig. 1, a joint operation system of SVC and APF according to the present invention adds a small-capacity APF part and a control device to the SVC system, wherein the static var compensator SVC is controlled by a thyristor, a reactor TCR and a passive filter PPF Composition, wherein the passive filter PPF is composed of a capacitor series tuning inductance, 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 DSP controller in the input control device, the output end of the DSP controller is respectively connected to the APF and the TCR through the driving circuit and the 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 phe...

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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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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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