云广直流同极双阀组电压平衡控制分析及改进

摘要

云广依800 kV特高压直流输电工程采用同极双12脉动阀组串联结构，双阀组电压的平衡控制相当重要。分析了双阀组电压平衡控制的策略和实现过程，针对两起分接开关导致的电压控制异常进行了分析，并结合现场实际提出改进建议，对改善系统运行有一定帮助。%Yunnan-Guangdong ±800 kV DC transmission project is designed with dual 12-pulses valve groups by each pole, it's im-portant to keep the DC voltage balance between two valve groups in the same pole.The paper analyzes the strategy and process of volt-age balanced control, and two abnormal voltage control caused by tap changer.Based on maintenance at site, improvement proposal is given to improve the system's operation.