Identification Experiments on Excitation Control System Models
Zhao Xianyuan · Hydropower Automation and Dam Monitoring · 2010
This paper introduces identification methods for transfer functions of excitation control system models. The transfer functions include washout,lead-lag filter,high-pass filter and low-pass filter element,etc. White noise is sampled as input of the transfer function being tested,and a spectrum analyzer is used to analyze the output signals of the transfer function. The validty of the transfer function implemented in software is verified by comparing the consistency of the tested magnitude-frequency and phase-frequency characteristics of the signal with the theoretical results. Experimental results obtained from Dahua Hydro Power Plant located at Guangxi power grid are given,and the ways to obtain the phase-frequency characteristic of generator without PSS and corresponding results are also introduced.