The influence and control measures of distributed photovoltaic generation on the voltage in distribution system

Compared with the conventional thermal power, the most prominent difference of the distributed photovoltaic generation (DPV) is the volatility, the randomicity and the intermittency of its output. The problem of the voltage regulation and reactive power control arising from the grid connected DPV will bring more serious negative impact on the security, stability, reliability and many other aspects of the power system. The negative load algorithms was used to study the influence of DPV on the voltage in distribution System and the impact caused by the different capacities and different locations of DPV on the voltage of distribution system was studied in this paper. The compound control strategy of Voltage and Reactive Power Control in Substation (VQC) and Static Var Compensator (SVC) was presented to regulate the voltage and control the reactive power of distribution system which interconnected with DPV, and the simulation results proved the feasibility and effectiveness of the proposed method.