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Matrix form indirect current control method of statcom

A technology of current control and form, applied in flexible AC transmission system, reactive power adjustment/elimination/compensation, etc., can solve problems such as difficulty in setting PI control parameters

Inactive Publication Date: 2015-12-09
XIAN UNIV OF TECH
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Problems solved by technology

[0004] The purpose of the present invention is to provide a matrix form indirect current control method of STATCOM, which calculates the control parameters as a whole in the process of controlling STATCOM, and solves the problem of difficult setting of PI control parameters in the current indirect current control strategy

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  • Matrix form indirect current control method of statcom
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  • Matrix form indirect current control method of statcom

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Embodiment Construction

[0064]The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0065] The purpose of designing the indirect current control strategy in the form of STATCOM matrix is ​​to solve the problem of difficult tuning of control parameters in the traditional indirect current control strategy.

[0066] Existing control strategies such as figure 1 As shown, it is difficult to tune the PI control parameters in the indirect current control strategy.

[0067] The technical solution adopted by the present invention is to firstly establish a relatively accurate mathematical model of STATCOM, and then design an indirect-controlled matrix controller according to the mathematical model. The input of the controller is the difference between the reference value and the detection value of the reactive current and the difference between the reference value and the detection value of the DC side voltage, and the output is the m...

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Abstract

The invention discloses a matrix form indirect current control method of a STATCOM (Static Synchronous Compensator). A linear mathematic model of the STATCOM is established according to a master circuit of the established STATCOM, and then a matrix form indirect current control strategy is designed according to the derived linear mathematic model of the STATCOM, wherein the control strategy solves a problem of difficulty in setting control parameters of the conventional indirect current control strategy. The matrix form indirect current control method overcomes the problem of difficulty in setting the control parameters in the conventional indirect current control method. In addition, an LQR (Linear Quadratic Regulator) method is applied to optimize a STATCOM system in a control parameter setting process.

Description

technical field [0001] The invention belongs to the technical field of power electronics, and relates to a matrix form indirect current control method of a STATCOM device for compensating reactive power of a power system. Background technique [0002] STATCOM is one of the core devices of FACTS (FlexibleACTransmissionSystem), which is used to compensate the reactive power of the grid. In recent years, the increasing proportion of wind power in the power grid has made STATCOM widely used to assist wind turbines to ride through low voltage. Therefore, the control of STATCOM needs to be further studied. The control strategy of STATCOM is divided into direct current control and indirect current control. Direct current control makes the output reactive current of STATCOM directly track the reactive current to be compensated [1-2] . Because the operating frequency of the main circuit switch is high and uncertain, it is necessary to take measures to reduce the switching loss whe...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/18
CPCY02E40/10
Inventor 张晓滨钟彦儒段建东曾光孙向东伍文俊
Owner XIAN UNIV OF TECH