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Wide area damper control method for generator based on system identification and genetic algorithm

A wide-area damping, genetic algorithm technology, applied in the field of generator wide-area damping control

Active Publication Date: 2012-04-18
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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Problems solved by technology

In the wide-area damping control of the generator, the installation point of the wide-area damping controller of the generator is connected with the whole system as a whole by collecting the wide-area feedback signal, and the assumption of a single-machine infinite system is no longer applicable

Method used

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  • Wide area damper control method for generator based on system identification and genetic algorithm
  • Wide area damper control method for generator based on system identification and genetic algorithm
  • Wide area damper control method for generator based on system identification and genetic algorithm

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Embodiment Construction

[0060] The generator wide-area damping control method based on system identification and genetic algorithm proposed by the present invention, its flow chart is as follows figure 1 As shown, the specific process is as follows:

[0061] (1) Establish a power system simulation model, which includes the equipment in the power system and the operating parameters of the power system. The equipment is generators, regulators, transformers, busbars, AC lines, DC lines, reactive power compensators and shunt capacitor reactors , the operating parameters of the power system are the power flow and load of the power system; set up a controlled system model identification module to identify the open-loop system model controlled by the generator wide-area damping controller; set up a genetic algorithm to solve the generator wide-area damping The controller parameter module is used to obtain the parameters of each link of the generator wide-area damping controller; a generator wide-area dampin...

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Abstract

The invention relates to a wide area damper control method for a generator based on system identification and a genetic algorithm, belonging to the technical field of electric system stable analysis. The method comprises the steps of: firstly, building a simulation model for an electric system; injecting small-amplitude stochastic disturbance sequence signals at the generator excitation end of the wide area damper controller for the generator; identifying an open loop controlled system model between the excitation end of the generator and a wide area feedback input sequence signal by a controlled system model identifying module; inputting the continuous controlled system model into a controller parameter module which is used for solving by using the genetic algorithm; and computing the parameters of the wide area damper controller for the generator. The feedback signal, obtained by using the method disclosed by the invention, of the wide area damper controller for the generator has good observability for an interval low-frequency oscillating mode. According to the wide area damper control method for the generator based on the system identification and the genetic algorithm, the damping ratio of the interval low-frequency oscillating mode is obviously improved, and the safe and stable operation of the system is ensured. The wide area damper controller for the generator, adopted by the invention, has the same structure with that of the traditional PSS (Power Stability Stabilizer), and is simple and easy for practices in engineering.

Description

technical field [0001] The invention relates to a generator wide-area damping control method based on system identification and genetic algorithm, and belongs to the technical field of power system stability analysis. Background technique [0002] With the interconnection of regional power grids and the continuous expansion of the scale of the power system, the problem of interval low-frequency oscillation has become increasingly prominent, which seriously threatens the safe and stable operation of the power system. [0003] The traditional method of suppressing low-frequency oscillation is to apply an additional damping controller (Power Stability Stabilizer, hereinafter referred to as PSS) on the excitation side of the generator. However, because PSS uses local signals as feedback input signals, the observability of the interval oscillation mode in the signal is poor, and the coordination among multiple local controllers is also difficult. Therefore, in a large number of P...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P9/10G06N3/12
Inventor 柳勇军赵艺陆超韩英铎
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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