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A System Model Identification Method for AC-DC Coordinated Control

An AC-DC coordination and system model technology, applied in general control systems, control/regulation systems, adaptive control, etc., can solve problems such as affecting the effect of AC-DC coordinated control, ignoring the dynamic characteristics of the DC system, and increasing the complexity of the identification technology. , to improve the efficiency of AC-DC coordinated control, solve excessive simplification, and improve the stability level

Active Publication Date: 2021-10-29
CHINA ELECTRIC POWER RES INST +2
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Problems solved by technology

[0003] At present, the existing model identification method is to carry out the overall identification of the AC and DC systems other than the DC additional controller, that is, to simplify the AC and DC systems other than the additional controller, and perform single-input and single-output system identification, ignoring the dynamics of the DC system. characteristics, which seriously affect the effect of AC-DC coordinated control, and the complexity of identification technology is greatly increased after considering the influence of DC system

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  • A System Model Identification Method for AC-DC Coordinated Control
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  • A System Model Identification Method for AC-DC Coordinated Control

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[0059] 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 fall within the protection scope of the present invention.

[0060] Such as figure 1 As shown, the present invention provides a system model identification method for AC-DC coordinated control, including the following steps:

[0061] Step 1. Select the controlled object according to the coupling degree of DC and AC lines in the research area;

[0062] Step 2. Determine the data relationship of the access port in the AC-DC hybrid system of the controlled object;

[0063] Step 3. Apply multi-band input information at ...

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Abstract

The invention provides a system model identification method for AC-DC coordinated control, the method selects the controlled object according to the coupling degree of DC and AC lines in the research area; determines the access port of the controlled object in the AC-DC hybrid system The data relationship of the AC-DC hybrid system; the multi-band input information is applied to both ends of the AC-DC hybrid system to obtain the basic data for system model identification; and based on the basic data, the AC-DC hybrid system is identified. The method proposed by the invention effectively solves the disadvantages of excessive simplification of the AC-DC system, simplifies the AC-DC system for system identification, and provides an effective method for system model identification considering the characteristics of the DC system; it also provides reliable AC-DC coordinated control. The model identification method; the invention effectively improves the AC-DC coordination control efficiency, and improves the stable level of power grid operation.

Description

technical field [0001] The invention relates to the field of power system stability control, in particular to a system model identification method for AC-DC coordinated control. Background technique [0002] AC-DC hybrid has become one of the most important forms of power transmission in the power system. In the coordinated control design of AC and DC power grids, because it is difficult to obtain the state equation of the system, the "exhaustive method" of control parameters is usually used, combined with system simulation or small disturbance stability analysis methods, to determine the controller parameters that can damp a certain oscillation mode of the system . Most of the controller design methods rely on accurate mathematical models. When the system scale is large and it is difficult to obtain its mathematical model, system identification technology is usually used to test certain response information of the system through appropriate experimental means. The mathema...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B13/04G05B17/02
CPCG05B13/04G05B17/02
Inventor 郭小江孙玉娇张玉红
Owner CHINA ELECTRIC POWER RES INST
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