光伏高渗透率下低压配电网电压管理策略研究

Research on Voltage Management Strategy for Low-voltage Distribution Networks under High Photovolatic Penetration Rate

为了对光伏逆变器高渗透率下低压配电网进行电压管理,研究了一种光伏高渗透率下低压配电网电压管理策略。首先,研究了一种Q(V)&P(V)光伏逆变器本地控制器;然后,基于Q(V)&P(V)控制研究了一种高渗透光伏接入低压配电网的电压管理策略;最后,案例分析在一个低压配电馈线系统中展开,借助DIgSILENT的编程语言DPL,分析了6种本地控制器的特点。结果表明,控制策略不仅能有效控制系统电压,相较于传统的本地控制,还能在降低系统有功损耗方面有较好的性能。

In order to carry out voltage management of low-voltage distribution networks under high penetration rate of photovoltaic inverters, a voltage management strategy was developed for low-voltage distribution networks under high photovolatic penetration rate. Firstly, a Q(V) & P(V) local controller for the photovoltaic inverter was studied. Then, based on Q(V) & P(V) control, a voltage management strategy was developed for high-penetration photovolatic access to the low-voltage distribution network. Finally, a case study was conducted for a low-voltage distribution feeder system, and the characteristics of six local controllers were analyzed with the help of programming language DPL of DIgSILENT. The results showed that the proposed control strategy could not only effectively control system voltage, but also have better performance in reducing active power loss of the system, when compared with traditional local control.