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Stability Improvement of Power System with Wind Integration based on L-index

Modern power systems are pushed to an extensive stress due to expansion of both commercial as well as domestic loads. The operation of such systems is so critical that any small disturbance can perturb such a large contingency that it sometimes may leave a large part of the system defunct. In this paper, the primary goal is to achieve the global stability of the system under study through reactive power compensation. A wind turbine generating unit (WTGU) is integrated with an IEEE-118 bus power system, improving the voltage profile to a large extent, then the locations where reactive power compensation is required most, are identified. Gravitational search algorithm (an optimization technique) is employed to get the optimal rating of compensating device (capacitor) to be placed at critical locations to achieve the global stability of the system.