新型交直流混合微电网结构设计

摘要

结构设计关系到交直流混合微电网的建设成本和运行性能.对交流微电网、直流微电网的典型结构进行了比较全面的对比分析.根据微电网的分区原则、分层原则、资源利用最大化原则、电能质量保证原则,设计了交直流混合微电网的3种拓扑结构,分别为多层型、单环型以及互补环型结构.利用微电网可靠性和经济性的分析方法及参考数据,对比了3种拓扑的系统可靠性指标和建设成本、运行维护费用等经济性指标,得出其各自的优缺点和适用场合.%Structure design will affect the construction cost and operation performance of hybrid AC/DC micro-grid.This paper takes an overall contrastive analysis on the typical structures of AC micro-grid and DC micro-grid.According to the partition principle,hierarchical principle,maximum resource utilization principle and the principle of electric energy quality assurance in micro-grids,three topological structures for hybrid AC/DC micro-grid are designed,which are multilayer type,single loop type and complementary loop structure.Using analytical method for reliability and economy and reference data in micro-grid,this paper compares the three new topologies on system reliability index and economic index such as construction cost,operation and maintenance cost and so on.Each structure's characteristics and application are given.