基于VDCOL的高压直流输电换相失败抑制系统  

Commutation failure suppression system for HVDC based on VDCOL

作　　者：李建青 潘文明 沈思 杜海红 刘士李 LI Jianqing;PAN Wenming;SHEN Si;DU Haihong;LIU Shili(Economic and Technical Research Institute,State Grid Anhui Electric Power Co.,Ltd.,Hefei 230031,China;State Grid Anhui Electric Power Co.,Ltd.,Hefei 230022,China)

机构地区：[1]国网安徽省电力有限公司经济技术研究院,安徽合肥230031 [2]国网安徽省电力有限公司,安徽合肥230022

出　　处：《电子设计工程》2025年第5期129-133,共5页Electronic Design Engineering

基　　金：安徽省电力公司科技项目(521609230031)。

摘　　要：在高压直流输电网络中,换相失败是导致无功功率不足的主要原因,无功功率长期不足会导致负载电压的持续下降。为解决上述问题,设计基于VDCOL的高压直流输电换相失败抑制系统。设置VDCOL控制单元与高压直流输电无功导流结构,设计换相失败抑制系统的硬件。完善基于VDCOL的换相原则,联合电压补偿条件,计算输电换相容量的具体数值,分析换相失败抑制作用,完成高压直流输电换相失败抑制系统设计。实验结果表明,在高压直流输电网络中,应用所设计系统可将无功功率缺失量控制在0~0.5 kW数值范围内,不会因换相失败而造成负载电压持续下降。In HVDC transmission network,commutation failure is the main reason for the lack of reactive power,and the long-term lack of reactive power will cause the continuous decline of load voltage.In order to solve the above problems,a HVDC commutation failure suppression system based on VDCOL is designed.VDCOL control unit and HVDC reactive power diversion structure are set up,and the hardware of commutation failure suppression system is designed.Improve the commutation principle based on VDCOL,combine the voltage compensation conditions,calculate the specific value of transmission commutation capacity,analyze the commutation failure suppression effect,and complete the design of commutation failure suppression system for HVDC transmission.The experimental results show that in HVDC transmission network,the reactive power loss can be controlled within the numerical range of 0-0.5 kW by using the designed system,and the continuous drop of load voltage due to commutation failure will not be caused.

关 键 词：VDCOL控制 高压直流输电 输电换相 电压补偿 无功功率 

分 类 号：TN99[电子电信—信号与信息处理]