| 引用本文: | 杜 翼,江道灼,尹 瑞,郑 欢,王玉芬.直流配电网拓扑结构及控制策略[J].电力自动化设备,2015,35(1): |
| DU Yi,JIANG Daozhuo,YIN Rui,ZHENG Huan,WANG Yufen.Topological structure and control strategy of DC distribution network[J].Electric Power Automation Equipment,2015,35(1): |
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| 摘要: |
| 对直流配电网的环状拓扑结构和两端拓扑结构的可行性进行了探讨，对直流配电网链式结构典型支路的功率方程等进行了推导与求解。对分布式能源和储能装置并入交流配电网和直流电网进行了对比研究，研究结果表明相较于接入交流配电网而言，接入直流配电网能够有效节省DC／AC变换器和滤波装置。采用了混合式直流断路器同时提出了一种直流配电网的协调控制模型。利用PSCAD／EMTDC对环状直流配电网结构的正常工况和故障情况进行仿真，仿真结果表明通过有效的控制和分布式能源的合理调度，能够有效限制短路故障对系统造成危害，缩短短路时间，使整个直流配电网更加有效稳定地运行。 |
| 关键词: 直流配电网 拓扑 混合式直流断路器 分布式电源 控制 模型 仿真 |
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| 基金项目:基金项目：国家高技术研究发展计划（863计划）资助项目（2013AA-050103） |
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| Topological structure and control strategy of DC distribution network |
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DU Yi, JIANG Daozhuo, YIN Rui, ZHENG Huan, WANG Yufen
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College of Electrical Engineering，Zhejiang University，Hangzhou 310027，China
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| Abstract: |
| The feasibility of ring and dual-terminal structures for DC distribution network is discussed and the power equations are deduced and solved for the typical branch of chained DC distribution network. The grid connection of the distributed energy source and energy storage is compared between DC and AC distribution systems and results show that，the connection to DC grid cuts down on the DC／AC converter and filters. Hybrid DC circuit breaker is applied and a coordinated control model of DC distribution network is proposed. The results of simulation with PSCAD／EMTDC for a ring-type DC distribution network under both normal and fault conditions validate that，with the effective control and reasonable scheduling of distributed energy sources，the harm of short circuit fault to system is effectively limited and the short circuit time is decreased，ensuring the operation of DC distribution network more efficient and stable. |
| Key words: DC distribution network topology hybrid DC circuit breaker distributed power generation control models computer simulation |
