【摘 要】
：
基于柔性直流技术的智能配电系统具有电能质量高、无需无功补偿、可隔离故障区域和便于可再生能源及储能装置接入等优点而逐渐成为国内外的研究热点,也因此成为了能源互联网发展的关键技术之一.基于柔性直流技术的智能配电系统与交流电网的连接方式是系统设计的基础,也是直流配电中的关键技术之一.本文针对±10kV基于柔性直流技术的智能配电系统,首先理论分析了其与10kV交流配电网之间可能的连接方式.然后基于PSCA
【机 构】
：
华南理工大学电力学院,广州 510640 深圳供电局有限公司,深圳518000
【出 处】
：
中国电机工程学会高电压专业委员会2015年学术年会
论文部分内容阅读
基于柔性直流技术的智能配电系统具有电能质量高、无需无功补偿、可隔离故障区域和便于可再生能源及储能装置接入等优点而逐渐成为国内外的研究热点,也因此成为了能源互联网发展的关键技术之一.基于柔性直流技术的智能配电系统与交流电网的连接方式是系统设计的基础,也是直流配电中的关键技术之一.本文针对±10kV基于柔性直流技术的智能配电系统,首先理论分析了其与10kV交流配电网之间可能的连接方式.然后基于PSCAD/EMTDC建立了不同连接方式下的仿真模型,仿真分析交流侧故障对直流系统设备过电压和过电流的影响,及直流侧故障对交流系统设备过电压和过电流的影响.最后,基于理论分析和仿真计算,从系统运行可靠性和经济性的角度提出了基于柔性直流技术的智能配电系统与交流电网之间连接方式,为直流配电网的接入方式提供了研究方法和思路,为柔性直流配电技术和示范工程的研究提供了基础支持.
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基于柔性直流的智能配电系统是国内外的研究热点,接地方案是直流配电系统规划设计的重要组成部分,也是过电压与绝缘配合和系统保护研究的基础,论文针对直流配电系统的接地方案开展了理论分析和仿真研究.本文结合系统主接线方式、入地电流要求、直流偏磁和继电保护要求等理论分析了接地方式和接地电阻的取值范围,并在PSCAD/EMTDC软件中建立了基于柔性直流的±10kV直流配电系统仿真模型,仿真分析了单极接地故障时