文章摘要
李梦柏,向往,左文平,等.具备无闭锁穿越直流故障能力的直流自耦变压器[J].电力系统自动化. DOI: 10.7500/AEPS20170912002.
Li mengbo,XiangWang,, et al.DC-DC Autotransformer with un-interrupted operating capability during DC fault[J].Automation of Electric Power Systems. DOI: 10.7500/AEPS20170912002.
具备无闭锁穿越直流故障能力的直流自耦变压器
DC-DC Autotransformer with un-interrupted operating capability during DC fault
DOI:10.7500/AEPS20170912002
关键词: 直流-直流转换  直流自耦变压器  高压直流变压器  直流故障  控制策略
KeyWords: DC-DC conversion  DC Autotransformer  HVDC converters  DC fault  control strategy
上网日期:2018-01-09
基金项目:国家电网公司科技项目(NYN17201600314);中国博士后创新人才支持计划项目(BX201700088)
作者单位E-mail
李梦柏 华中科技大学 mengbo_li@foxmail.com 
向往 华中科技大学 xiangwang1003@foxmail.com 
左文平 华中科技大学 radio.zuo@foxmail.com 
姚良忠 中国电力科学研究院 yaoliangzhong@epri.sgcc.com.cn 
林卫星 特变电工新疆新能源股份有限公司 weixinglin@foxmail.com 
文劲宇 华中科技大学 jinyu.wen@hust.edu.cn 
摘要:
      本文提出了一种直流-直流自耦变压器拓扑,该换流器可以在不闭锁任何设备的情况下穿越变压器两侧直流线路故障。论文首先分析了目前直流自耦变压器技术的特点及其缺陷所在,针对目前直流自耦变压器无法穿越直流故障的问题,分析了直流自耦变压器穿越直流故障的需求,然后在其基础上结合混合型模块化多电平换流器特点,设计了具备无闭锁可穿越直流故障的直流自耦变压器子模块数目配比。然后,设计了该变压器的控制策略,保证其在正常工况和故障工况下的稳定运行。最后,在PSCAD/EMTDC下搭建了320kV/640kV、1000MW的测试系统,验证了本文所提出的无闭锁穿越直流故障直流自耦变压器技术的可行性及控制策略的有效性。
Abstract:
      This paper proposed a novel type of DC/DC converter, termed as un-interrupted DC Autotransformer (DC AUTO), which has capability to ride through DC fault on either side of the converter without de-blocking any devices. Firstly, the working principles and the corresponding design procedures of the un-interrupted DC AUTO are il-lustrated. Then an effective control strategy is proposed to enable the converter steady operation during both normal time and faulted condition. Finally, a 1000MW ±320kV/±640kV test system is built on PSCAD/EMTDC platform to testify the technical feasibility of the proposed converter and the effectiveness of the proposed control strategy.
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