佛山电网220kV雷岗变电站10kV母线电压超标问题的研究

Study on 10 kV Bus Side Overvoltage in 220 kV Leigang Substation in Foshan Power Grid

针对佛山电网220kV雷岗变电站10kV母线电压超标的问题,详细分析了该地区10kV直供大用户安装的并联电容补充装置、配电网无功功率补偿、电缆较普通架空线路呈现较强的容性等因素对电压超标的影响。同时,借助电力系统计算分析软件建立该地区的仿真模型,以轻负荷运行为研究对象,考虑10kV母线侧投入感性无功功率补偿情况,在仿真计算后分析出感性无功功率补偿方案,较好地解决了该地区电压超标的问题。

According to the overvoltage on l（） kV bus side of transformer in 220 kV Leigang Substation in Foshan power grid, the paper analyzes the impacts of the following aspects on the voltage problem in detail： the shunt capacitor configuration of large consumers supplied directly by 10 kV system in the area, the reactive power compensation of distribution network, and cable capacitance which is greater than that of common overhead lines. The simulation model for the area is built by using computational and analytical software of power system. Case study focuses on the situation when the system operates during light load and 10 kV system is compensated by inductive reactive power. Based on the case study, an inductive reactive power compensation plan which can solve the voltage problem is achieved.