Abstract
The situation, grid integration of variable renewable energy and electricity sector reforming in Japan, will increase uncertainties in power system operation.To handle these uncertainties, this paper introduces the sophisticated voltage and reactive power management technology based on AC-OPF (Optimal Power Flow) using online data, advanced online volt/var(Q) control system (OPENVQ: Optimized Performance Enabling Network for Volt/var(Q)), which can reduce operating expenditure (OPEX) by transmission loss reduction and optimized control of shunt devices and transformer taps, and/or capital expenditure (CAPEX) by optimized management of voltage control assets. Its architecture consists of a security assessment, a look-ahead operational condition predictor, optimal power flow calculation, and scenario analyzer.To validate the performance of OPENVQ system, a simulator has been developed that can handle multi-period operational conditions considering time series. Simulation results based on the TEPCO Power Grid 1500-bus model show that multiple control procedures created by OPENVQ system can optimize the KPIs, and new logic to reduce the number of control of shunt devices and transformer taps for managing grid voltage could be confirmed.Furthermore the feasibility study of OPENVQ system in Thailand has been conducted by NEDO (New Energy and Industrial Technology Development Organization)’s study scheme in Japan.
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