具备潮流控制功能的多端口混合式直流断路器 |
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引用本文: | 史雪亚,王鹤,边竞,关佳欣.具备潮流控制功能的多端口混合式直流断路器[J].现代电力,2020,37(6):598-604. |
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作者姓名: | 史雪亚 王鹤 边竞 关佳欣 |
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作者单位: | 东北电力大学电气工程学院,吉林省 吉林市 132012 |
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基金项目: | 国家自然科学基金项目(51677023) |
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摘 要: | 针对多端柔性直流电网的故障保护和潮流控制问题,该文提出一种具备潮流控制功能的多端口混合式直流断路器,由通流支路、主断路器支路两部分构成。当系统正常稳态运行时,该断路器具有潮流控制功能,可用于调节支路潮流;系统发生故障后,相当于混合式直流断路器,用于切断故障电流。建立了具备潮流控制功能的多端口混合式直流断路器拓扑,阐述了稳态和暂态运行机理,并进行经济性分析。最后,在PSCAD仿真平台搭建了四端直流输电系统,验证了所提拓扑在潮流控制和故障切除方面具有良好的性能。
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关 键 词: | 直流电网 潮流控制 故障保护 多端口 直流断路器 |
收稿时间: | 2019-05-17 |
Multi-port Hybrid DC Circuit Breaker With Power Flow Control |
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Affiliation: | School of Electrical Engineering, Northeast Electric Power University, Jilin 132012, Jilin Province, China |
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Abstract: | Aiming at the fault protection and power flow control problems of the multi-terminal flexible DC grid, this paper proposed a multi-port hybrid DC circuit breaker with power flow control function. The proposed breaker consists of two parts: the through-flow branch and the main breaker branch. When the system is in the steady state operation, it has a power flow control function, which can adjust the branch power flow; when the system fails, the structure is equivalent to a hybrid DC circuit breaker for cutting off the fault current. A multi-port hybrid DC circuit breaker topology with power flow control function was established; the steady-state and transient operation mechanism were elaborated; and the economic characteristicswere analyzed. Finally, a four-terminal DC transmission system was built on the PSCAD simulation platform to verify the proposed topology, which has good performance in power flow control and fault removal. |
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