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Analysis of Oscillation Modes Occurred by ON/OFF Time Intervals of Switching Equipments by the RCf Method  

Kim, Deok-Young (군산대학 전자정보공학부)
Dong, Moo-Hwan (군산대학 전자정보공학부 대학원)
Lee, Yun-Ho (군산대학 전자정보공학부 대학원)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers A / v.55, no.1, 2006 , pp. 13-17 More about this Journal
Abstract
In this paper, the RCF(Resistive Companion Form) analysis method which is used to analyze small signal stability problems of non-continuous systems including switching devices. The RCF analysis method is mathematically rigorous and computes eigenvalue of the system periodic transition matrix based on discrete system analysis method. As an effect of switching operations, the eigenvalues of the systems are changed and newly unstable oscillation modes may be occurred. As an illustrating example, the oscillation modes of the system with different switching time intervals are computed exactly by the RCF analysis method and the results show that ON/OFF time intervals of switching equipments are important factors to make the system stable or unstable. This result shows that the RCF analysis method is very powerful to analyze small signal stability problems of power systems including switching devices such as FACTS equipments.
Keywords
Eigenvalue; FACTS Equipment; ON/OFF Time Interval; RCF Method; State Transition Equations; Switching Devices;
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