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The most important requirement of a power system for maintaining desired voltage profile and voltage stability is the existence of sufficient amount of reactive power reserve in the proper location of the power system. The requirement to locally generate reactive power, has made determining the installation point to be a requirement. In this paper some methods for identification of critical buses in power system are studied and results obtained from applying different compensation methods on a test system are presented. In addition, the effect of application of wind generation on static voltage stability of the power system, are studied.