摘要
中压配电网的柔性互联是智能配电网的重要内容,但可支持配电网联络的一次装备却非常有限。为给配电网柔性互联提供新的技术手段,提出了晶闸管控制曲折变压器,阐明了其主电路拓扑和工作原理,其三相电压的幅值和相位均可在六边形区域内灵活调节;建立了其电压方程和潮流方程,提出了相应的控制策略;通过仿真,验证了所提电路拓扑和控制策略的有效性,可独立、快速调节联络线的有功和无功潮流,并可实现故障隔离。
1Flexible interconnection between mid-voltage distribution systems is a significant topic of smart distribution network. However, equipment types for distribution system connections are quite limited. As a novel technical approach to realize flexible interconnection, thyristor-controlled zigzag transformer is proposed and its primary circuit and operating mechanism are investigated. Amplitudes and phases of its three phase voltages are conveniently adjustable within a hexagonal area. On this basis, its voltage and power flow equations are established and control strategy is presented. Simulation results demonstrated effectiveness of the proposed circuit topology and control strategy. Both active and reactive power flows of tie-line can be regulated rapidly and independently, and fault isolation can be realized as well.
出处
《电网技术》
EI
CSCD
北大核心
2017年第10期3244-3250,共7页
Power System Technology
基金
国家高技术研究发展计划项目(863计划)(2015AA050102)~~
关键词
配电网
柔性互联
晶闸管换流器
曲折变压器
distribution network
flexible interconnection
thyristor converter
zigzag transformer
