Real-Time Power System Small Signal Stability Monitoring and Analysis Using Synchronized Phasor Measurements
Date Issued
2004
Date
2004
Author(s)
Chien, Shih-En
DOI
zh-TW
Abstract
This thesis presents how to use synchronized phasor measurements to do power system small signal stability monitoring and analysis. Take the Taiwan power system of year 2003 as the study system. First, the eigenvalue analysis and frequency response of the study system are performed using SSSP(Small Signal Stability Program). Then simulate the time domain dynamic response under some small perturbations using PSS/E(Power System Simulator/Engineering). These simulation results offered by SSSP and PSS/E draw a picture of how small signal stable the Taiwan power system of year 2003 is and can be relied on to decide where to locate the phasor measurement units (PMUs) and verify the computation results of small signal stability evaluation indices afterward. Next some buses to locate PMUs and parameters to measure are selected for simulation and the measured low-frequency oscillation data is simulated by PSS/E. Finally, given the measured data, use PRONY method to calculate the small signal stability evaluation indices. After verification, comparison and analysis of these computation results of small signal stability evaluation indices, it is shown that the evaluation indices observed especially from some parameters measured at some buses are quite accurate. Also the program execution speed is pretty fast. Both the accuracy and speed can all meet the requirements of real-time monitoring and analysis systems. So this thesis concludes that the idea of real-time power system small signal stability monitoring and analysis using synchronized phasor measurements is feasible. This study can also act as a reference for the power company to plan the dynamic security monitoring system in the future to improve the power system dynamic stability.
Subjects
小信號穩定度
同步相量量測值
電力系統
power system
synchronized phasor measurements
small signal stability
Type
thesis
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