中压蜂巢状配电网结构研究及应用

Research and Application of Medium Voltage Honeycomb Distribution Network Structure

针对在支撑高比例分布式新能源消纳及源网荷储协调互动方面传统配电网遇到的瓶颈问题,基于蜂窝状配电网理论搭建一种高可靠性的中压蜂巢型配电网网架结构。总结国内外中压配电网网架的研究现状,并从安全性、实用性、可靠性、经济性4个维度分析中压蜂巢状配电网结构的优缺点。结合区域直流资源发展趋势,从交流组网过渡策略及交直流组网过渡策略两方面提出中压蜂巢状配电网过渡策略。对蜂巢状配电网关键技术进行了初步探索,对比分析柔性软开关(Soft Open Point,SOP)技术路线及容量选取原则。最后,以某试点区域为例进行网架改造升级示范,指导蜂巢状配电网精准规划、有序推进,验证了所提中压蜂巢状配电网网架结构及过渡策略的合理性和可行性。

Aiming at the bottleneck problems encountered by traditional distribution networks in supporting the high proportion of distributed new energy consumption and the coordinated interaction of source-grid-load-storage,this paper builds a high reliability medium voltage honeycomb distribution network structure based on the honeycomb theory.Firstly,the domestic and international research status of the medium voltage distribution network is summarized,and the advantages and disadvantages of medium voltage honeycomb distribution network structure are analyzed in four dimensions,such as security,practicality,reliability and economy.Secondly,combining with the development trend of regional DC resources,the transition strategy of medium-voltage honeycomb distribution network is proposed in terms of AC grouping network transition strategy and AC-DC grouping network transition strategy.Then,the preliminary exploration of key technologies of honeycomb distribution network is carried out,and the soft open point(SOP)technical route and capacity selection principles are compared and analyzed.Finally,taking a pilot area as an example,the network transformation and upgrading are demonstrated to guide the precise planning and orderly promotion of the honeycomb distribution network.The rationality and feasibility of the medium-voltage honeycomb distribution network structure and transition strategy are verified.