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Synchronous generator parameter identification method

A synchronous generator and parameter identification technology, applied in the field of power grid analysis, can solve problems such as unstable identification results, nonlinear generator model, many electrical parameters, and complex identification algorithms.

Active Publication Date: 2019-12-10
EAST CHINA BRANCH OF STATE GRID CORP +2
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Problems solved by technology

[0003] However, the generator model has many nonlinear and electrical parameters, which makes the identification algorithm complex and prone to unstable identification results.

Method used

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Embodiment Construction

[0050] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below in conjunction with the drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the invention. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0051] Such as figure 1 and 2 As shown, the specific steps of synch...

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Abstract

The invention discloses a parameter identification method for a synchronous generator. The parameter identification method comprises the following steps: step 1, establishing a synchronous generator mathematical model; step 2, calculating the track sensitivity of each parameter of the generator under disturbance; step 3, calculating a weight coefficient of each generator parameter; step 4, calculating the deviation between a model simulation value and a phasor measurement unit (PMU) measurement value, and carrying out the parameter correction; step 5, optimizing generator parameter based on agenetic algorithm. According to the method, the track sensitivity of each electrical parameter is deduced through a four-order mathematical model according to different influence capacities of each parameter of the generator on the system, different influence weights are set for algorithm optimization according to the track sensitivity, and an initial group range is set.

Description

technical field [0001] The invention relates to the technical field of power grid analysis, in particular to a parameter identification method for a synchronous generator. Background technique [0002] my country's power system has entered a new era of large power grids, large units, UHV, and AC / DC hybrid interconnection. The rapidly expanding power system and the application of new technologies in the power grid have greatly increased its own complexity, and the security issues of the power system have become increasingly prominent. The accuracy of the generator model and parameters directly affects the calculation results of power system stability and affects control decisions. However, due to the complex actual working conditions of the generator, although the motor manufacturing department has provided some design parameters, the deviation is often large, resulting in a discrepancy between the calculation results and the actual situation. Therefore, the modeling and mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06N3/12
CPCG06N3/126
Inventor 谢昶周毅徐衍会刘林林陆俊白伟马晶栾伟杰沙倩雨谭旸
Owner EAST CHINA BRANCH OF STATE GRID CORP
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