抄録
Recently, the FACTS (2)(3)(4) is actively researched and developed. A Solid State Phase Shifter is one of the FACTS equipments, and has become of major interest to control power flow with its phase-shift finction. (10)(11)(12)
This paper describes voltage compensations by a Variable Reactor (VR) using a Solid State Phase Shifter. The VR is connected in series with a power system, and control the line voltage by a compensation of the line impedance. In this paper, characteristics of voltage compensations with the series compensators are compared with those of the parallel compensators such as Static Var Compensators in a power system. Then, a power circuit configuration and a control system of the VR are presented in practically. We have examined performances of the VR through digital simulations and experiments using mini-model and obtained satisfied characteristics. Voltage fluctuation caused by reactive loads was completely compensated, and voltage unbalance ratio was improved from 7.4% to 1.7%. These results are presented.
