Abstract
This paper presents a fuzzy-expert system approach to steady-state voltage stability monitoring and control in a power system. In the proposed rule-based expert system, a systematic procedure for voltage stability monitoring and control is developed. Key elements associated with voltage instability are identified using modal analysis. The information from the above analysis is stored in a knowledge base. A set of decision rules relating key system variables to voltage stability are established. The designed expert system performs voltage stability monitoring and control through deductive reasoning. The New England 39-bus system is taken as a case study to illustrate the proposed procedure.
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