并网光伏电站节点电压越限稳定机理分析

Analysis of the Stability Mechanism of the Limit Exceeding of the Node Voltage in the Grid-Connected Photovoltaic Power Station

随着光伏电站规模迅速扩张,其参与电力系统的无功调节愈发频繁,导致静态电压稳定问题日益凸显。通过构建大型并网光伏电站稳态数学模型,推导并网节点静态电压稳定性影响因素,分析大型并网光伏电站并网节点电压越限机理,为后续大型并网光伏电站在功率与电压优化方面开展研究奠定基础,并利用MATLAB2019a及优化程序MATPOWER7.0搭建模型进行仿真分析。

With the rapid expansion of the scale of photovoltaic power stations,their participation in the reactive power regulation of the power system is becoming more frequent,resulting in static voltage stability problems.This paper constructs a steady-state mathematical model of a large-scale grid-connected photovoltaic power station,deduces the factors affecting the static voltage stability of grid-connected nodes,and analyzes the limit exceeding mechanism of the node voltage of large-scale grid-connected photovoltaic power stations,which lays a foundation for subsequent researches on power and voltage optimization of them.MATLAB2019a and the optimization program MATPOWER 7.0 are used to build a model for the simulation analysis.