A pi parameter optimization method for constant current controller of HVDC transmission

A technology of high-voltage direct current transmission and optimization method, applied in the direction of power transmission and AC network, etc., can solve the problem of high initial value dependence, and achieve the effect of high degree of integration, strong engineering reference value, and rapid local convergence

Active Publication Date: 2017-05-10
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

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  • A pi parameter optimization method for constant current controller of HVDC transmission
  • A pi parameter optimization method for constant current controller of HVDC transmission
  • A pi parameter optimization method for constant current controller of HVDC transmission

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Embodiment Construction

[0036] The method for optimizing the PI parameters of the HVDC constant current controller based on the hybrid genetic algorithm of the present invention will be described in detail below in conjunction with the accompanying drawings and the embodiments, but the scope of protection of the present invention is not limited to the following embodiments.

[0037] The present invention proposes a method for optimizing PI parameters of a high-voltage direct current transmission constant current controller based on a hybrid genetic algorithm, taking the application in the CIGRE HVDC Benchmark test system as an example, and the details are as follows:

[0038] Step 1: Use the HVDC quasi-steady-state model as the calculation model for parameter optimization in 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, all control angles of the converter station are def...

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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 for optimizing PI parameters of a constant current controller on a direct current rectification side by using a hybrid genetic algorithm, which belongs to an innovative technology for optimizing PI parameters of a constant current controller for high-voltage direct current transmission. Background technique [0002] As an emerging power transmission method, high-voltage direct current transmission has many advantages over AC power transmission. For example, it can realize asynchronous communication between different rated frequencies or the same rated frequency AC systems, especially suitable for high-voltage, long-distance, and large-capacity power transmission. It is especially suitable for the interconnection between power grids in large areas, with low line power consumption, little harm to the environment, strong se...

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Application Information

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Patent Type & Authority Patents(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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