电力建设2024，Vol.45Issue(4)：37-45,9.DOI:10.12204/j.issn.1000-7229.2024.04.004
提高特高压直流运行可靠性的分接开关优化控制策略
Optimized Control Strategy for Less Action Frequency of Tap Changers in UHVDC
摘要
Abstract
The tap changer of converter transformers is a key component in UHVDC systems.Severalinstances of forced converter outages or equipment damage have been attributed to tap changer faults.Reducing the action frequency of tap changers can decrease the probability of equipment fault and increase the reliability of UHVDC systems.An optimized control strategy is proposed for the typical control of tap changers in UHVDC systems.For the sending converter station,the proposed strategy suggests appropriate expansion of the triggering angle deadband and adjustment of the tap changer before converter deblocking.For a receiving converter station based on alfa-max inverter control,dynamic DC voltage control and corresponding upgrading is proposed.For a receiving converter station based on constant DC voltage control,the proposed strategy suggests expanding the extinguishing angle deadband appropriately and regulating the tap changer before converter deblocking.The presented optimized control strategy of tap changers is theoretically concise and requires minimal modifications to existing control and protection systems,making it easily applicable.Theoretical analysis results,real-time simulations,and on-site operational data validate the efficacy of the proposed strategy,showing significant reductions in tap changer actions and promising prospects for UHVDC applications.关键词
特高压直流/分接开关控制/优化/可靠性Key words
UHVDC/tap changer control/optimization/reliability分类
信息技术与安全科学引用本文复制引用
马玉龙,宋胜利,王玲,尹健,李明,马为民,卢亚军,张俊..提高特高压直流运行可靠性的分接开关优化控制策略[J].电力建设,2024,45(4):37-45,9.基金项目
This work is supported by National Natural Science Foundation of China(No.U2166602).国家自然科学基金项目(U2166602) （No.U2166602）
