Synchronous generator model parameter multi-step identification method

A technology of synchronous generator and model parameters, applied in the direction of motor generator testing, etc., can solve the problem of low identification accuracy

Active Publication Date: 2012-06-27
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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Problems solved by technology

[0009] The purpose of the present invention is to propose a step-by-step identification method for synchronous generator model parameters to solve the problem that the identification accuracy of the existing synchronous generator model parameter identification method is not high

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  • Synchronous generator model parameter multi-step identification method
  • Synchronous generator model parameter multi-step identification method
  • Synchronous generator model parameter multi-step identification method

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Embodiment Construction

[0077] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0078] To identify the parameters of the synchronous generator, the mathematical model of the synchronous generator must be determined first. The most commonly used mathematical model of a synchronous generator is the Park equation of a synchronous generator, or a simplified model of a synchronous generator that is properly simplified according to the Park equation. Especially in power system calculation, the simplified model of synchronous generator is often used to calculate various transient processes. The identified parameters of the simplified model of synchronous generator represented by derived parameters can meet the needs of power system calculation, and can also be used to calculate some other transient proc...

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Abstract

The invention discloses a synchronous generator model parameter multi-step identification method in the technical field of power grid analysis and calculation. The method comprises applying a down and an up step disturbance, a short circuit disturbance and a pulse disturbance to a synchronous generator, or applying a down step disturbance, a short circuit disturbance and a pulse disturbance to a synchronous generator, or applying a down step disturbance and a short circuit disturbance to a synchronous generator; calculating the d axis synchronous reactance xd and the q axis synchronous reactance xq of the synchronous generator according to the steady state data before and after down step disturbance; and identifying the d axis transient reactance x'd, the d axis sub-transient reactance x''d, the d axis open-circuit transient time constant T'd, the d axis open-circuit sub-transient time constant T''d, the q axis transient reactance x'q, the q axis sub-transient reactance x''q, the q axis open-circuit transient time constant T'q, and the q axis open-circuit sub-transient time constant T''q according to the disturbance applied to the synchronous generator. The invention improves parameter identification precision.

Description

technical field [0001] The invention belongs to the technical field of power grid analysis and calculation, and in particular relates to a step-by-step identification method for model parameters of a synchronous generator. Background technique [0002] The development of my country's power system has entered a new era of large power grids, large units and high voltage. The planning, design, operation and management of the power grid put forward higher requirements for the accuracy of power grid analysis and calculation. Today, with the continuous development of computers and advanced application software, correct component models and actual grid parameters are important foundations. [0003] The calculation of various dynamic characteristics of the synchronous generator is realized by solving the basic equations of the motor under various specific conditions, so the accuracy of the basic parameters of the synchronous generator directly determines the accuracy of the calcula...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/34
Inventor 郑竞宏朱守真盛超张俊峰
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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