Research on Reactive Power Control Strategy for Improving Sag Curve in Active Distribution Network
High penetration access of distributed photovoltaic(PV)will lead to voltage fluctuation and over-limit problems in distribution networks.To give full play to the voltage regulation of PV inverters,an active distribution network improved sag curve reactive power control strategy based on approximate voltage sensitivity is proposed.The inverter of each PV node derives its own reactive-voltage sensitivity according to the calculation and configures the sag curve of the PV inverter according to its own sensitivity value,so that all the PV nodes can uniformly participate in the reactive power control of the system,in order to improve the voltage regulation capability of the system.The simulation of IEEE 33 node arithmetic example shows that,in the case of single-node and multi-node access to the PV,the voltage regulation effect of the proposed strategy is better than that of the traditional in-situ control strategy.The proposed strategy can more fully utilize the regulation capability of the PV inverter to improve the node voltage level.
Distributed photovoltaic(PV)Active distribution networkReactive voltage controlSensitivity analysisPV inverterSag curve
万方数据
维普
