A HYBRID TOOL TO ASSIST THE OPERATOR IN REACTIVE POWER VOLTAGE CONTROL AND OPTIMIZATION

This paper presents an integral tool to assist the operator in reactiv e power dispatching for voltage profile improvement and power loss min imization. Advantage is taken of both numerical (conventional) and heu ristic (knowledge-based) methods in order to find a practical number o f control variables (smooth and/or discrete) which can be effectively used to solve voltage violations or to reduce power losses. Efficiency is measured according to sensitivity of voltages (or power losses) to control variables, current voltage profile and reserve margins. Imple mentation details of the system, recently integrated in a control cent er, as well as some practical results are also presented and discussed .