Voltage control strategy for distribution network with thermostatically controlled loads equivalent energy storage model considering minimum-on-off time

With the large-scale integration of distribution generations (DGs), distribution network (DN) encounters the new challenges in voltage control. Due to some existing conventional voltage regulation equipment in the DN lacks active power regulation capability, a voltage regulation strategy with thermostatically controlled loads (TCLs) equivalent energy storage model considering the minimum-on-off time is proposed in this paper to alleviate voltage magnitude. Then, a voltage management model incorporating TCLs is developed as a multi-objective optimization model that collectively minimizes demand response (DR) cost, network loss, voltage deviation and voltage overrun penalty. Compared with existing methods, the proposed method achieves lower network loss and maintains safe voltage levels under random load demand and renewable power injection. Finally, the proposed method is verified by testing examples.