Power Flow and Stability Improvement in Distribution Systems Using Phase Angle Regulator

Abstract

The increased penetration of renewable power resources into power grid leading to more stability and security issues in the grid. The dynamic power flow control as per system requirements is highly desirable in order to ensure the system security. The congested management and power flow control can be achieved with FACTS Controllers. One among the FACTS devices is the Phase Angle Regulator (PAR), which is used in the article for controlling the power flow and system stability. The power and control circuits of the PAR has been developed in Maltlab Simulink environment and has been simulated with domestic, commercial and distribution systems with phase angle control and results have been presented in the article. The control logic has been developed to improve the power flow with automatic switching action of PAR for the desired power flow in a feeder. Finally laboratory based testing have been performed without and with PAR with different phase angles and loads such as small, medium and heavy loads and results have been presented herewith and which proves the effectiveness of PAR in improving power transfer capability and stability.KeywordsPower flow controlPhase Angle RegulatorPower system stabilityCongested managementPower system securityFACTS devicesPhase shifting transformerZigzag transformer