计及分布式光伏配电网供电能力计算方法

分布式电源接入配电网后可以提高供电能力。提出了一种可以有效计及分布式光伏出力的配电网供电能力计算方法，通过将分布式光伏简化为一台特殊的变压器，降低了配电网供电能力分析的复杂性；采用蒙特卡洛仿真计算分布式光伏和传统变压器联网运行的可靠性指标；通过“N-1”校验，确定配电网的供电能力。算例表明：该方法可以明确计算分布式光伏对供电能力的提升作用。

Calculation Method of Power Supply Capacity of Distribution Network Considering Distributed PV

Power supply capacity can be improved by integration of distributed PV. A calculation method is presented in this paper to effectively calculate the power supply capacity of distribution network with consideration of distributed photovoltaic(PV). Firstly, the distributed PV is simplified into one special transformer and the analysis of power supply capacity is thus dumbed down. Then, the Monte Carlo simulation is used to estimate the reliability of the combined system of distributed PV and traditional transformers. Finally, the power supply capacity is calculated through checking the procedure of“N-1” standard. Case study has shown that the proposed method can calculate the effectiveness of the distributed PV in improving power supply capacity.