The Study and Improvement of Voltage Stability with the Limit of Power Transmission

• Main Authors: Jeng-Cheng Shieh, 謝正誠
• Other Authors: Ching-Yin Lee
• Format: Others
• Language: zh-TW
• Published: 1999
• Online Access: http://ndltd.ncl.edu.tw/handle/38340033520241485104

碩士 === 國立臺北科技大學 === 機電整合研究所 === 87 === Taiwan power system in the peak-load period has a large amount of power flow through 345kV-transmission lines from the central and southern areas to northern area. In this time, if one of these lines is tripped, the voltage stability of the power system would be affected. Hence, how to prevent voltage collapse and compensate the reactive power of a power system become very important. In the past, most of researches in the field of voltage stability used uniform rate to deal with the system load increase. In this paper, we analyze the power system stability, focusing on the limit of transmission line power flow between two areas. This paper uses PSS/E, IPLAN and OPF analysis package to develop a helpful method to generate P-V curves for Taiwan power system voltage stability analysis. Using these P-V curves, it is easy to identify the saddle-node bifurcation point and to determine the weak bus index and real power transmission limit from the central area to northern area. Besides, in normal operating condition, some line outage cases with 345kV-interface line from central area to northern area and some generator outage cases of the voltage stability of Taiwan power system were studied. Finally, the optimal compensation of the parallel capacitors and series capacitors to improve the voltage stability of the system were proposed in this paper.