集中光伏电源接入对低压配电网电压的影响

以分布式光伏电源（PV）接入低压配电网后对线路电压产生影响为研究对象，理论分析PV接入配电网的电压损耗模型，提出一种功率分布函数法，并应用于电压损耗建模中。根据电压损耗模型，通过算例研究PV在不同接线方式、系统不同负荷运行方式下对低压配电网电压的影响，结果表明低压母线最大负荷运行方式电压损耗情况优于最小运行方式，PV专线接入配电网方式的电压损耗情况优于T接入接线方式，光伏有功功率接线位置距离台区母线越远，电压损耗问题越明显，这些为光伏电源接入配电网后的有效利用提供参考。

Influence of Concentrated Photovoltaic Power Supply Access on Voltage of Low Voltage Distribution Network

The access of distributed photovoltaic power supply PV with the low-voltage distribution network will have effect on the voltage. The voltage loss model of PV access distribution network is theoretically analyzed， and a power distribution function method is proposed for voltage loss modeling. According to the voltage loss model， the influence of different PV connection modes， different load operation modes on low-voltage distribution network voltage are studied by numerical examples. The results show that the voltage loss of low-voltage bus maximum load operation mode is better than that of the minimum operation mode， the voltage loss in the distribution network mode is better than the T access wiring mode， farther the PV active power wiring position from the busbar of station area， more obvious is the voltage loss problem. The results can provide reference for the effective utilization of photovoltaic power supply after accessed to the distribution network.