Synchronous generator practical model parameter examination and identification method based on parameter measure unit (PMU)

Abstract

The invention provides a synchronous generator practical model parameter examination and identification method based on a parameter measure unit (PMU). Based on PMU measured data, a generator high voltage bus voltage magnitude after a system is disturbed and a phase exciting voltage measured value are used as an input for examining of a generator practical parameter, and the effectiveness of the practical parameter is judged. An actual measurement generator power angle function can be achieved by utilizing the PMU, voltage and d, q axis component of currents are calculated, and thereby a least square method is used for respectively identifying park model parameters of the two axle, and finally, the generator practical model parameter is determined. By means of the synchronous generator practical model parameter examination and identification method based on the PMU, power system stability analysis reliability is improved, and reliable reference is supplied for planning and design, and scheduling decisions of a power grid.

Description

technical field [0001] The invention belongs to the technical field of parameter identification of synchronous generators, and in particular relates to a method for checking and identifying parameters of a practical model of a synchronous generator based on a PMU. Background technique [0002] Accurate generator model parameters are the key to power system stability analysis and research, which directly affects the safe operation of the power system. In recent years, with the wide application of new theories and technologies such as system identification theory, phase angle measurement technology (PMU), and global positioning technology (CPS) in power systems, generator parameter identification based on these new technology platforms has made great progress. In addition, each identification algorithm presents the characteristics of mutual cross fusion. [0003] In the identification of various generator parameters, the most widely used methods are time-domain identification...

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Problems solved by technology

In addition, the frequency domain response analysis is based on the linear system, which cannot reflect the nonlinear characteristics of the parameters of the synchronous motor

[0005] The load throwing method test has been widely used since it was proposed in the 1970s. Its advantages are that it is easy to implement and takes into account the influence of working conditions on parameters. The calculation method is relatively simple, but it needs to arrange specific tests.

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