Enhanced Controllability with Multiple Static Synchronous Series Compensators

The present trends in deregulation of power generation and development of renewable energy sources, such as Photovoltaic and wind power, and connecting them to the distribution networks, has led to issues of maintaining system stability, power supply quality and reliability. Greater interconnection of electrical power networks enables efficient distribution of renewable energy sources but requires flexible network operation with minimum losses and cost. Since the construction of new transmission lines is very expensive, a cost-effective policy is to use the existing lines to their maximum thermal limit, and this requires optimum sharing of power flow between them. Flexible AC Transmission Systems (FACTS), such as Static Compensator (STATCOM) and Unified Power Flow Controller (UPFC), are the key technology. These enhance the controllability of transmission networks and maximize power transfer capability. In this paper, a modular and scalable series compensation technique so as to enhance the controllability & flexibility in transmission network of a distributed power system/Micro grid is proposed.