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High degree penetration of residential rooftop Photovoltaic (PV) systems will cause the overvoltage problem in power distribution system. In this study, a real-time overvoltage prevention control realized by multi-agent based community energy management system (CEMS) is proposed. The main concept of the proposed control is to suppress the overvoltage by managing the operation schedule of household...
nowadays, power system tends to be operated in heavily stressed load, which can cause voltage stability problem. Moreover, occurrence probability of contingency is increasing due to growth of power system size and complexity. This paper proposes a new preventive control scheme based on voltage stability and security monitoring by means of wide area monitoring systems (WAMS). The proposed control scheme...
A surge of needs for the low carbon society promotes a spread of electric vehicle (EV). EVs could be charged at night simultaneously, as a result, severe voltage drop may happen. The authors have proposed the method which can compensate the voltage drop caused by EV charging by means of adjusting charging schedules and controlling reactive power. However, though the method can avoid the voltage violation,...
A surge of needs for the low carbon society promotes a spread of electric vehicle (EV). EVs could be charged at night simultaneously, as a result, severe voltage drop may happen. Typical charger for EV employs the self-commutated inverter, which can control both active and reactive powers in principle. The authors are investigating the availability of EVs for the distribution system operation qualitatively,...
Challenges for the low carbon society has brought a spread of electric vehicles (EVs). Most of EVs could be charged at night simultaneously. That could cause severe voltage drop along the feeder. On the other hand, EVs are able to inject/absorb reactive power by using interfacing inverter in principle. This paper proposes active and reactive power management which can regulate feeder voltages in the...
The authors have proposed Flexible, Reliable and Intelligent ENergy Delivery System (FRIENDS) as a future power distribution system. In the FRIENDS, new facilities called quality control centers (QCCs), which consist of power electronics devices, distributed generators (DGs), energy storage systems (ESSs), etc., are installed between distribution substations and customers. By controlling and operating...
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