AUTOMATED VOLTAGE STABILITY PROTECTION AND CONTROL USING A WIDE AREA NETWORK OF PHASOR MEASUREMENTS

Abstract

When a major power system disturbance occurs, protection and control systems have to limit the impacet, stop the degradation and restore the system to a normal state by appropriate remedial actions. Wide area measurement and protection systems limit the severity of disturbances by early recognitions as well as proposition and execution of cordinated stabilizing aciton. These systems complement classical protection and SCADA/EMS applications. The paper proposes for Power Holding Company of Nigeria (PHCN), a system design based on phasor measurement units, encouraging system protection schemes for frequency, small signal angle and voltage instability. The system is compared to classical protection and SCADA/EMS systems showing its benefits. A new algorithm for long-term voltage stability prediction is introduced using the proposed system setup