Critical clearing time estimation of multi-machine power system transient stability using fuzzy logic (original) (raw)
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International Journal of Engineering Research and Technology (IJERT), 2016
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IJERT-Transient Stability Enhancement of Multi-machine Power System using Fuzzy Controlled TCSC
International Journal of Engineering Research and Technology (IJERT), 2014
https://www.ijert.org/transient-stability-enhancement-of-multi-machine-power-system-using-fuzzy-controlled-tcsc https://www.ijert.org/research/transient-stability-enhancement-of-multi-machine-power-system-using-fuzzy-controlled-tcsc-IJERTV1IS6179.pdf Power system is subjected to sudden changes in load levels. Stability is an important concept which determines the stable operation of power system. In general rotor angle stability is taken as index, but the concept of transient stability, which is the function of operating condition and disturbances deals with the ability of the system to remain intact after being subjected to abnormal deviations. For the improvement of transient stability the general methods adopted are fast acting exciters, circuit breakers and reduction in system transfer reactance. The modern trend is to employ FACTS devices in the existing system for effective utilization of existing transmission resources. These FACTS devices contribute to power flow improvement besides they extend their services in transient stability improvement as well. In this paper, the studies had been carried out in order to improve the Transient Stability of WSCC 9 Bus System with Fixed Compensation on Various Lines and Optimal Location has been investigated using trajectory sensitivity analysis for better results. In order to improve the Transient Stability margin further series FACTS device has been implemented. A fuzzy controlled Thyristor Controlled Series Compensation (TCSC) device has been used here and the results highlight the effectiveness of the application of a TCSC in improving the transient stability of a power system.
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2006 International Conference on Power System Technology, 2006
In this paper a fuzzy logic based controller for STATCOM is used to improve power system transient stability. As opposed to the modern control theory, fuzzy logic design is not based on the mathematical model of the process. The controller designed using fuzzy logic implements human reasoning that can be programmed into fuzzy logic language (membership functions, rules and the rule interpretation). The nonlinear fuzzy controller is proposed to supply a supplementary control signal to STATCOM to increase the critical clearing time and overcome the uncertainties existing in the power systems. Proposed method is implemented in a single machine infinite bus system and the results are compared with conventional energy function based controllers.