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Parameter identification method of synchronous generator excitation system

A technology of synchronous generator and excitation system, applied in the field of system parameter identification

Active Publication Date: 2016-05-25
SHANGHAI MUNICIPAL ELECTRIC POWER CO +2
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  • Application Information

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Problems solved by technology

[0005] However, the traditional manual identification method has certain defects.

Method used

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  • Parameter identification method of synchronous generator excitation system
  • Parameter identification method of synchronous generator excitation system
  • Parameter identification method of synchronous generator excitation system

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Embodiment Construction

[0058] The method for identifying parameters of the excitation system of a synchronous generator according to the present invention will be further explained and described below in conjunction with the accompanying drawings and specific embodiments.

[0059] In this embodiment, the excitation system of the synchronous generator to be identified adopts the AC brushless excitation method, and the Alstom excitation controller is used. The parameter θ to be identified is the PI parameter of the control link, including the proportional parameter K p and the integral parameter K i , the disturbance signal X of the disturbance test is a step signal, and the response index examines three rise time, overshoot and adjustment time, that is, the number N of the response index is 3, therefore, i=1, 2, 3 in this embodiment.

[0060] figure 2 The flow chart of the method for identifying parameters of the excitation system of a synchronous generator described in the present invention in an ...

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Abstract

The invention discloses a parameter identification method of a synchronous generator excitation system, which is used for outputting an optimal solution of a parameter Theta of the synchronous generator excitation system. The parameter identification method comprises the following steps of building an excitation system simulation module M; determining an equivalent standard J; and carrying out disturbance test on the excitation system with a signal X, and acquiring each real response index Y<Ri>. The parameter identification method also comprises the following steps of determining weight W corresponding to the Y<Ri>, wherein Sigma W is equal to 1; selecting a value of the parameter Theta, substituting the value of the parameter Theta into the M, carrying out disturbance test on the M with the signal X, and acquiring each real response index Y<Ii>; calculating an error e between the Y<Ii> and the Y<Ri>, and calculating a weight value e<W> of the error e if the error e conforms to the equivalent standard J; and taking the value of the parameter Theta as the optimal solution to be output if the e<W> is the minimum e<Wmin>, wherein the numbers of the Y<Ri> and the Y<Ii> are both N, and i is equal to 1, 2 until N. By the parameter identification method, the optimal solution can be found out from a parameter solution cluster of the synchronous generator excitation system, and the identification speed is increased within an acceptable precision range to the great extent.

Description

technical field [0001] The invention relates to a system parameter identification method, in particular to a generator excitation system parameter identification method. Background technique [0002] The synchronous generator excitation system is the sum of all components that provide excitation to the synchronous generator. The excitation system plays a very important role in the voltage control and stable operation of the power system. Therefore, it is necessary to establish a model of the excitation system and carry out accurate parameter identification. On the one hand, the dynamic response results of the excitation system to external disturbances are obtained through field tests, and the step response indicators such as rise time, overshoot, and adjustment time are calculated by using the relevant knowledge of automatic control principles, and the working performance of the excitation system can be assessed. On the other hand, the higher-level dispatching agency uses t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P9/14G06F17/50
CPCG06F30/367H02P9/14
Inventor 李福兴沈小军李梧桐李驹何莲
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
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