Voltages and Reactive Power Controls in Power System Network Using Automatic Voltage Regulator (Avr) and Static Var Compensator Methods

The intent of this paper is to analyzed voltage and reactive power control in power systems network using automatic voltage regulator (AVR) and static AVR compensator methods. An overview of reactive power and voltage control in generation, transmission and distribution systems such as generators excitations - automatic voltage regulation (AVR) and Static VAR Compensator (SVC) of reactive power was presented. Voltage and reactive power control involves proper coordination among the voltage and reactive power control equipment in the distribution system to obtain an optimum voltage profile and optimum reactive power flows in the system according to the objective function and operating constraints. These methods enhance voltage controls, system stability and allow maximal utilization of the transmission system. Minimize reactive power flows, to reduce active as well as reactive power losses in the system network. Excitation Controls in power systems keep the terminal voltages of the generators close to reference values as well as all equipment in the system are within acceptable limits and the reactive power flow is minimized so as to reduce power losses. SVC enhances the system voltage during heavy load condition and reduces the over-voltage occurring during light load conditions and to prevent voltage collapse.