The Influence of Measured Trajectory Based Model Parameters Correcting on Simulation Precision of Power System Dynamic Frequency

Abstract:

Although numerical simulation is an important method of researching dynamic frequency process, obvious deviations have been found between numerical simulation and the measured trajectory in many accidents. And the existing simulation model and parameters cannot describe the actual dynamic process of frequency accurately. Research was carried out on the influence of four parameters to the dynamic frequency process, which based on the WSCC system. The four parameters include the inertia constant of generator, generator frequency coefficient, dead band and turbine intermediate superheating coefficient. Northeast China power grid and measured data are used to verify the above research conclusion. Checking the dynamic frequency process simulation model and parameters can improve the accuracy of dynamic frequency process simulation on the base of the measured trajectory and the physical characteristics of the parameters. It can also give efficient foundation for the setting work of UFLS, overcoming the previous conservative operation mode and so on.

• Periodical: Applied Mechanics and Materials (Volumes 448-453)
• Pages: 2545-2550
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.448-453.2545
• Online since: October 2013
• Authors: Gang Mu, Ming Li*, Jun An, Xing Wei Xu, Shuai Shao
• Keywords: Dynamic Frequency, Measured Trajectory, Numerical Simulation, Parameter Regulation, Power System

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