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DOI:
电力大数据:2018,21(2):-
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柔性直流智能配电网的保护配置与动作策略研究
吴海涛,王世祥
(深圳供电局有限公司,深圳供电局有限公司)
Analysis of Protection Configuration and Action Strategy on Flexible DC Transmission and Distribution Network in Megalopolis
Wuhaitao and wangshixiang
(Limited Company of Shenzhen Power Supply Bureau,Limited Company of Shenzhen Power Supply Bureau)
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投稿时间:2018-01-06    修订日期:2018-01-16
中文摘要: 为探索高可靠性配电网的发展方向,首次对柔性直流配电网的可靠性进行深入研究。随着电压源换流器的发展,柔性直流智能输配电技术呈现出向无源区供电,不存在换相失败问题等优点,直流配电网的可靠性将逐步接近甚至超越交流配电网,为特大型城市供电提供有利技术支持。文章简析了特大型城市面临的供电情况,说明了特大型城市采用柔性直流智能输配电网必要性,重点研究了特大型城市采用柔性直流智能输配电网的继电保护配置和动作策略,将继电保护配置通过电气接线位置进行系统划分,分成换流站交流开关场保护区、换流器保护区、直流输电线路保护区,并针对各区故障的特点配置不同保护功能。对特大型城市柔性直流供电保护配置及动作策略有一定的参考价值。
Abstract:To explore the development direction of highreliable distribution network in future, it was the first time toresearch the reliability of medium-voltage flexible DCdistribution network in depth.With the development of voltage source inverter,flexible DC transmission and distribution technology presents the advantages of no commutation failure problem when supply power to no source area. the reliability of DC distributionnetwork would be close to that of AC distribution networkgradually and even higher than that of AC distribution network.It provides good technical support for the poor power supply ability in super-large city. The article analysis the supply situation in large cities and the need of Flexible DC transmission and distribution network in super-large city. Focuses on t protection configuration and action strategy on flexible DC transmission and distribution network in megalopolis. According to electrical wiring position the relay configuration is divided into three parts such as AC switch yard protected areas、protection zone converter and DC transmission line protection zone. According to the characteristics of each district there are different fault protection functions. There is certain reference value on protection configuration and action strategy on Flexible DC transmission and distribution network in megalopolis.
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