In this paper, we propose a priority control method for a step voltage regulator (SVR) considering reactive power of a static var compensator (SVC) in distribution network. The method enables SVR to estimate voltages of distribution line without SVC and SVR to decide SVR tap position considering the estimated voltage. SVC operation data transmitted to SVR via communication network is used to estimate the line voltage. The method enables SVC to reduce the short term voltage fluctuation and to reduce the long term voltage fluctuation cooperatively. The method is also applicable using intermittent telecommunication.
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