Fuzzy inference system to assist the operator in reactive power control in distribution systems

The paper proposes a fuzzy inference system to assist the operator for voltage control and power loss minimisation. The reactive power control problem is decoupled from the voltage regulator problem. A fuzzy expert system provides rules for both the problems. The fuzzy inference system acts as the front-end to determine the control variables for the two decoupled problems. An existing 30-bus distribution system is used to demonstrate the effectiveness of the above approach. Simplicity of approach and speed make it a viable option for online Var control.