1000 kV荆门变电站主变压器第三线卷额定电压选择及低压无功补偿设备配置

根据无功就地平衡的原则和投切无功补偿设备时对电压波动的限制要求，确定了1000 kV荆门变电站低压无功补偿设备的容量和分组方案。在此基础上，为保证低压设备运行的安全及灵活性，根据有关设计规程，结合工程实际经验，提出了主变压器第三线卷额定电压、低压电抗器和低压电容器的最高运行电压和额定电压。研究结论已作为特高压输变电设备研制和开发的重要技术依据。

Rated Voltage Selection of the Third Windings of Main Transformers in 1000kV Jingmen Substation and Configuration of Low Voltage Reactive Power Compensation Devices

According to the principle of local balance of reactive power and the requirement of restricting voltage fluctuation during the switching on/off of reactive power compensation devices,the capacity of low voltage reactive power compensation devices configured in 1000kV Jingmen substation and the grouping scheme of them are determined.On this basis,in order to ensure the secure and flexible operation of low voltage devices,according to relevant design specification and combining with practical experience the highest operating voltage and rated voltage of the third windings of main transformers,lower voltage reactors and capacitors are suggested.These research conclusions are taken as important technical base for the development of 1000kV power transmission and transformation equipments.