Electric Power Network System for Effective Use of Distributed Generators

Research Project , Research Report 2003

Akihiko YOKOYAMA Dept. of Electrical Engineering, Univ. of Tokyo
Jumpei BABA Dept. of Advanced Energy, Univ. of Tokyo(Research Partners)
Math BOLLEN Dept. of Electric Power Engineering, Chalmers Uniersity or Technology, Sweden
Goran ANDERSSON Swiss Federal Institute of Technology Zurich, ETH, Switzerland
Stephen R. CONNORS Analysis Group for Regional Electricity Alternatives, MIT, USA
Chen CHEN Dept. of Electrial Engineering, Shanghai Jiao Tong University

Abstract

Voltage regulation scheme for distribution lines is one of the key technologies to realize an independent small-scale electric power network consisting of many distributed generators that convert from renewable energy into electric energy. In this study, a small independent electric power system model has been made from the actual island-power system, and three types of FACTS devices, Static Synchronous Compensator(STATCOM), Static Synchronous Series Compensator(SSSC) and Unified Power Flow Controller(UPFC) are analyzed by comparison of required minimum capacity of the inverters in a residential distribution network with a large peneration of photovoltaic generations. From a comparison of the required minimum capacity in radial distribution network, UPFC needs less capacity than STATCOM and SSSC. In this simulation, if can be said that injecting AC voltage via series transformer is effective for the voltage control of the distribution network.

Keywords:

Photo Voltaic Generation, Flexible AC Transmission System, Unified Power Flow Controller, Voltage Regulation, Independent Power System