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Method for modeling generator set excitation system based on frequency-domain method

A technology for generator sets and excitation systems, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of lack of model accuracy and precision, not considering the frequency domain characteristics of the excitation system, and improve the observability. , get rid of limitations, improve the effect of accuracy

Inactive Publication Date: 2012-10-03
SOUTHEAST UNIV
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Problems solved by technology

Modeling from the perspective of time domain is only a superficial study of the time domain dynamic characteristics of the excitation system in some specific occasions, as the basis and goal of the modeling of the excitation system of the generator set, and does not consider The deeper frequency domain characteristics of the excitation system, so this modeling technique based on the time domain method will likely lead to the lack of accuracy and precision of the built model

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  • Method for modeling generator set excitation system based on frequency-domain method
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  • Method for modeling generator set excitation system based on frequency-domain method

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings.

[0030] Taking Unit 1 of the Phase I Project of Jiangsu Xukuang Comprehensive Utilization Power Generation Co., Ltd. as an example, the method of the present invention is specifically described in conjunction with the accompanying drawings. The whole process is as follows figure 1 As shown, the specific steps are as follows.

[0031] Step 1: Obtain the excitation system model and related initial parameters

[0032] The report provided by the tester shows that the unit adopts the self-shunt excitation mode, and the excitation regulator adopts the UNITROL 5000 excitation system produced by ABB Company. The structural block diagram of the excitation system is shown in figure 2 .

[0033] After reviewing technical reports and research analysis, the FV excitation model in the BPA software that is closest to the excitation device of this unit is selected as the modeling t...

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Abstract

The invention discloses a method for modeling a generator set excitation system based on a frequency-domain method. The method comprises the following steps: (1) obtaining an excitation system model and related initial parameters; (2) extracting measured frequency domain characteristics of the generator set excitation system; (3) building a mathematical model of an excitation system; (4) initially modeling the generator set excitation system, and (5) optimizing the parameters of the generator set excitation system model. The method for modeling the generator set excitation system based on the frequency-domain method is suitable for modeling various set excitation systems and gets rid of the traditional limitation of modeling based on a time domain method. The model built based on the method can accurately reflect the parameter of each link of the excitation system and simultaneously enable the built model fully consider system important index-frequency domain characteristics neglected in the past.

Description

technical field [0001] The invention relates to a modeling method for the excitation system of a generator set, in particular to a method for establishing a more reliable and accurate model of the excitation system of a generator set based on a frequency domain analysis method, and belongs to the field of power system operation and control. Background technique [0002] With the continuous expansion of the grid scale and the continuous improvement of the unit capacity and voltage level of generator sets, the power system has entered the era of large power grids, high voltage and large units, so higher requirements are placed on system stability. In this context, the generator excitation system plays a very important role in the voltage control and stability control of the power system, especially in the case of faults, it has a greater impact on the transient stability of the system. The generator set excitation system is of great significance to the stable and safe operatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 蒋平陈伯林吴熙
Owner SOUTHEAST UNIV
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