Development of a Series Static Voltage Compensator for the High-speed Voltage Control on a Distribution Line

Conventional voltage control on a distribution line has been carried out by Load Ratio Transformer (LRT) and Step Voltage Regulator (SVR). However, since the object of these control methods is slow voltage fluctuation, the high-speed voltage control system is required according to the spread of electronic equipment. This paper presents a series Static Voltage Compensator (SVC). It is possible to compensate momentary sag due to active and reactive power. The voltage control method is described and it is also shown that this technique makes possible co-operating work with SVR. Furthermore, the equipment built-in the voltage control method of a SVC is made as an experiment. The voltage compensation performance is verified by the connection with Real Time Digital Simulator (RTDS). In addition, a 75 kVA SVC is developed, and it was confirmed that the voltage control performance of a SVC achieved our desired end.