Distributed Real-time Voltage Control Strategy Considering Reactive Power Margin and Cost-effectiveness

Rapidly increasing penetration of intermittent renewable energy sources in the active distribution network (ADN) has a substantial impact on traditional voltage control strategies. To reserve sufficient reactive power to deal with various voltage problems of the ADN, a distributed real-time voltage control strategy considering reactive power margin model (RPMM) and voltage regulation cost model (VRCM) is proposed based on distributed information consistency updating (DICU) algorithm and model predictive control (MPC). The proposed strategy consists of two modes. In normal mode, only the basic reactive power (BRP) of distributed generators (DGs) is used to regulate the voltage. In emergency mode, both BRP and standby reactive power (SRP) are regulated to deal with fast voltage violations. The proposed strategy is tested on a real distribution network in Finland, and simulation results verify its effectiveness in real-time voltage control and reduction of regulation costs, as well as its resilience against information interruptions and communication delays due to cyber attacks.