Abstract
This paper introduces the working principle and the mathematical model of additional power system excitation control-Power System Stabilizer (PSS). Through established a typical single machine-infinite bus power system simulation model, we simulate the synchronous generator’s transient operational characteristics following a severe disturbance. The simulation results show that the PSS can not only effectively increase the system damping, but also improve operational characteristics of the generator, considerably enhance power system dynamic and transient stability.
Highlights
The synchronous generator’s excitation system plays an important role in advancing power system’s reliability and stability
Conventional PID control based on classical control theory has been widely used, but PID control adjusted only by terminal voltage deviation can not provide satisfactory damping characteristics, especially for the control of large generator units, that the damping characteristics will produce spontaneous lowfrequency oscillation, threatening the power system stability [1]
The effective measures to solve the contradiction between voltage regulation accuracy and dynamic stability is the additional power system stabilizer (PSS), which can effectively enhance the damping of power system, thereby improve its static and dynamic stability
Summary
The synchronous generator’s excitation system plays an important role in advancing power system’s reliability and stability. Enhancing the performance of excitation devices has been acknowledged as one of the most efficient and economic method to improve generator’s stability. Conventional PID control based on classical control theory has been widely used, but PID control adjusted only by terminal voltage deviation can not provide satisfactory damping characteristics, especially for the control of large generator units, that the damping characteristics will produce spontaneous lowfrequency oscillation, threatening the power system stability [1]. The effective measures to solve the contradiction between voltage regulation accuracy and dynamic stability is the additional power system stabilizer (PSS), which can effectively enhance the damping of power system, thereby improve its static and dynamic stability
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