浅谈串联电容器补偿在解决10 kV线路片区低电压问题的应用

Discussion on the Application of Series Capacitor Compensation in Solving the Low Voltage Problem of 10 kV Line Area

摘要: 肇庆广宁10 kV古水线(LGJ-150为主)长约14.5公里基本没负荷，到古水站公用开关站分出墟镇甲、里溪、红旗、蒙坑、牛岐、轴承、湘下、大平等8个分支。由于供电半径过长，线径偏细，分支线路自首端起至末端均有不同程度的电压偏低现象，到开关站处电压已经低于9 kV。湘下支线寺坑公用台变处供电半径将近38公里 。本文通过在10 kV主线末端开关站安装10 kV智能配网串联补偿电容成套装置，对于装置的实际效果做分析，通过理论计算、实际数据统计等方面验证装置的电压提升、功率因数改善、降低线损、自适应补偿等效果。通过总结分析，针对山区10 kV线路因供电距离过长引起的片区低电压问题，具有推广应用的实际意义，确保了偏远地区的供电质量和供电稳定性。

Abstract: Zhaoqing-Guangning 10 kV Gu Shui line (LGJ-150) which is about 14.5 km long showed no load. The Gushui public switch station is divided into 8 branches, Xuzhenjia, Li Xi, Hongqi, Mengkeng, Niu Qi, Zhoucheng, Xiangxia and Daping. Because the radius of the power supply is too long and the diameter of the line is too thin, the voltage of the branch line is different from the terminal to the end, and the voltage at the switch station is less than 9 kV. The power supply radius of Shikeng, the branch of Xiangxia is nearly 38 kilometers. In this paper, through the installation of smart grid 10 kV series capacitor compensation equipment in 10 kV line terminal switch device, we make the actual effect analysis of voltage. With the theoretical calculation, statistics and so on, we verify different functions of the device, for example: boost the voltage, improve power factor, reduce the loss, improve the adaptive compensation and so on. Based on the summary and analysis, it is of practical significance for popularization and application of low voltage problems caused by the long distance of power supply in mountainous 10 kV lines, which ensures the power quality and power supply stability in remote areas.