DEVELOPMENT OF A TYPICAL POWER SYSTEM WITH UNIFIED POWER FLOW CONTROLLER

Abstract

The problem of power supply in most countries like Nigeria is the ability to maintain steady supply of electricity to every part of the country without first expanding the existing power network. This is achievable with the use of power electronic devices called Flexible alternating current transmission system (FACTS). This paper looked at one of the types of FACTS devices called unified power flow controller (UPFC). The unified power flow controller (UPFC) is a combination of two inverter based compensating device, the shunt compensating static compensator (STATCOM) and a series compensating static synchronous series compensator (SSSC). The combination of the two allows for control of power flow along with independent control of voltage. This paper presents the basis upon which the UPFC operates. It gave the circuit configurations of UPFC, the operating principles, the benefit of making use of UPFC in a power network, modeling of power system with UPFC and then concludes with the proposal on the placement of UPFC on the identified voltage violated areas of the 58 Bus Nigeria 330kv transmission Line network.