Method for optimizing PI parameter of high-voltage direct-current transmission constant-current controller

A high-voltage direct current transmission and optimization method technology, applied in the direction of power transmission AC network, etc., can solve the problem of high dependence on the initial value

Active Publication Date: 2014-07-02
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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Problems solved by technology

The simplex method is easy to fall into local optimum, and the algorithm is highly dependent on the initial value

Method used

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  • Method for optimizing PI parameter of high-voltage direct-current transmission constant-current controller
  • Method for optimizing PI parameter of high-voltage direct-current transmission constant-current controller
  • Method for optimizing PI parameter of high-voltage direct-current transmission constant-current controller

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Embodiment Construction

[0036] The following describes in detail the PI parameter optimization method of the HVDC constant current controller based on the hybrid genetic algorithm of the present invention with reference to the accompanying drawings and embodiments, but the protection scope of the present invention is not limited to the following embodiments.

[0037] The present invention proposes a method for optimizing PI parameters of a HVDC constant current controller based on a hybrid genetic algorithm. The application in the CIGRE HVDC Benchmark test system is taken as an example. The detailed description is as follows:

[0038] Step 1: Use the HVDC quasi-steady state model as the calculation model for parameter optimization of the present invention.

[0039] The DC transmission quasi-steady-state model is to take the AC bus voltage of the converter station as the commutation voltage during calculation, and all the control angles of the converter station are defined according to the commutation voltage...

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Abstract

The invention discloses a method for optimizing a PI parameter of a high-voltage direct-current transmission constant-current controller. The method includes the following steps of firstly, using a high-voltage direct-current transmission quasi-steady-state model as a calculation model for parameter optimization; secondly, calculating a target function; thirdly, initiating an algorithm parameter; fourthly, calculating the feasible region of the PI parameter; fifthly, optimizing a genetic algorithm; sixthly, embedding a simplex method to judge the condition; seventhly, optimizing a mixed algorithm. The method relies mainly on the genetic algorithm while the simplex method subsidiary, the simplex method is embedded after optimization of the genetic algorithm tends to stop, and the advantages of local optimization of the simplex method are utilized while the individual variation and the global optimization capacity of population of a traditional genetic algorithm are kept. The simplified mode, namely, the quasi-steady-state model which is widely adopted during direct-current power transmission engineering calculation, is adopted, and therefore the calculation speed is high, the calculation accuracy meets the engineering requirements, the method is suitable for optimizing the parameter of the direct-current transmission system controller, and the degree of combination between the method and practical engineering is high.

Description

Technical field [0001] The invention relates to a method in the technical field of power system control parameter optimization. Specifically, it is a method of using a hybrid genetic algorithm to optimize the PI parameters of the constant current controller on the rectifier side of the HVDC transmission, which is an innovative technology of the PI parameter optimization method for the constant current controller of the HVDC transmission. Background technique [0002] As an emerging power transmission method, HVDC transmission has many advantages over AC transmission. For example, it can realize asynchronous communication between AC systems with different rated frequencies or the same rated frequency. It is especially suitable for high-voltage, long-distance, and large-capacity transmission. It is especially suitable for the interconnection between large-scale power grids, with low line power consumption, low environmental hazard, and strong self-protection ability in case of line...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/36
CPCY02E60/60
Inventor 杨煜邓晶李明黄莹黎小林李岩
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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