Voltage regulation with smart loads in distribution system under high penetration of renewable energy

摘要

The paper deals with design and control of voltage regulation system using smart loads(SLs) under large penetration of renewable energy system in distribution level. High penetration of Renewable Power Generations (RPG's) effect reliable operation of bulk power system results in fluctuation in frequency and voltage of the network. Electric spring (ES) is proposed as effective method for regulation of grid voltage under fluctuating RPG's without aid of any communication system. It is aconverterbased system with self-commutated switches in bridge fashion, which is connected with noncritical loads in series to act as smart load. These SLs are controlled to regulate voltage across critical loads and thus participating in demand side management. Increased penetration of RPG, mainly variable speed wind energy conversion system is having effect on voltage and power quality. A study of effect of variable speed wind energy system on system voltage is carried and which is modeled with varying wind speed. Performance analysis of smart loads are compared with existing reactive compensator and Improvement in voltage profile of test feeder study conducted.