中国电机工程学报2024，Vol.44Issue(19)：7580-7592,中插8,14.DOI:10.13334/j.0258-8013.pcsee.230496
基于源网限流贡献度配合的MMC-HVDC系统自适应故障限流策略
A Self-adapting Fault Current Limiting Strategy for Flexible HVDC System Based on Source-network Current Limiting Contribution Coordination
摘要
Abstract
Fault current limiting is the key technology to ensure the safe operation of HVDC system.The existing source-side and network-side current limiting methods are usually configured independently and do not match the severity of faults,so it is difficult to balance the current limiting capability and the cost of device.To solve the above problems,this paper proposes a fault limiting strategy based on source-network coordination considering the severity of faults.Adaptive Target and failure condition oriented current limiting is realized by combining the voltage regulation of the source-side modular multilevel converter(MMC)with the fault current limiter(FCL)by means of current limiting contribution.On the premise of ensuring current limiting capability,this strategy reduces the cost of FCL configuration and the adverse impact of MMC step-down operation on the power grid.Firstly,the contribution degree of source MMC and network FCL is quantitatively analyzed respectively,and then the calculation method of source-network current limiting considering the cooperation of current limiting contribution is derived.Based on this,the adaptive fault current limiting strategy matching the fault severity is proposed.Finally,the effectiveness of the proposed strategy is verified in the electromagnetic transient simulation of PSCAD.关键词
柔性直流输电/半桥型模块化多电平换流器/故障严重程度评估/限流贡献度/源网配合/自适应Key words
MMC-HVDC/half-bridge modular multilevel converter(MMC)/fault severity assessment/fault current limiting contribution/source-network coordination/self-adaptation分类
信息技术与安全科学引用本文复制引用
罗永捷,周丹莹,魏能峤,廖建权,王强钢..基于源网限流贡献度配合的MMC-HVDC系统自适应故障限流策略[J].中国电机工程学报,2024,44(19):7580-7592,中插8,14.基金项目
国家自然科学基金项目(U22B6006,52207126). Project Supported by National Natural Science Foundation of China(U22B6006,52207126). （U22B6006,52207126）
