适应大规模分布式光伏并网的无功电压控制方法  

Reactive Voltage Control Method Suitable for Large-Scale Distributed Photovoltaic Grid-Connection

作　　者：胡乃红[1] 李健 HU Naihong;LI Jian(School of Electronic Engineering,Anhui Water Conservancy Technical College,Hefei 231603,China;School of Electronic Engineering,Chaohu University,Hefei 238024,China)

机构地区：[1]安徽水利水电职业技术学院电子工程学院,合肥231603 [2]巢湖学院电子工程学院,合肥238024

出　　处：《重庆科技学院学报（自然科学版）》2023年第6期92-99,共8页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：安徽省自然科学研究项目“三维碳基复合材料的制备及性能研究”(KJ2021ZD0170)。

摘　　要：为避免大规模分布式光伏并网影响配电网的总体电压,提出一种适应大规模分布式光伏并网的无功电压控制方法。通过光伏逆变器、静止同步补偿器及并联电容器等三者的相互协调进行分布式光伏并网的无功电压控制,并以有功网损、补偿容量和电压偏差最小为目标,结合系统潮流约束、节点电压约束、并联电容器投切次数约束,构建无功电压控制方法,经改进的灰狼优化算法求解后,可得出适应大规模分布式光伏并网的最优调节方案。实验结果表明,此方法可以根据光伏公共连接点的电压越限情况自动调节无功电压,快速准确地计算出最优调节方案,减少有功网损,提高配电网的电能质量和资源利用率。In order to avoid the impact of large-scale distributed photovoltaic grid connection on the overall voltage of the distribution network,the reactive voltage control method suitable for large-scale distributed photovoltaic grid connection is proposed.The PV inverter,static synchronous compensator and shunt capacitor coordinating with each other are used to control the reactive voltage of distributed PV grid-connected.and the reactive voltage control method is built with the goal of minimizing the active network loss,compensation capacity and voltage deviation,combining the system power flow constraints,node voltage constraints,and shunt capacitor switching times constraints.After the improved Grey Wolf optimization algorithm is solved,the optimal regulation scheme of reactive voltage control suitable for large-scale distributed photovoltaic grid connection is obtained.The experiment shows that this method can automatically adjust the reactive voltage according to the over limit situation of the photovoltaic PCC voltage,quickly and accurately calculate the optimal adjustment scheme,reduce the active network loss,and improve the power quality and resource utilization rate of the distribution network.

关 键 词：光伏并网 分布式电源 无功电压控制 光伏逆变器 配电网 灰狼优化算法 

分 类 号：TM732[电气工程—电力系统及自动化]