基于复杂网络的电热微网拓扑综合评估方法

针对传统微网评估方法无法适用于多节点耦合电热微网的问题,基于复杂网络理论,建立一类新的电热微网拓扑评估体系及综合评估方法。根据复杂网络中单向图和双向图模型分别对电热微网建模,利用多层依存网络实现电热解耦,根据复数节点度、节点介数、效率系数、介数权重和效率系数权重的节点度等指标,量化节点对微网敏感性、可靠性和经济性的影响,搜寻关键节点,辨识度高,实现对电热微网敏感性、可靠性和经济性的综合评估。实际算例表明,上述方法在单向或双向静态网络中可快速搜寻电网和热网的关键节点,在部分边指向发生变化或单节点故障的情况下仍适用,证明了其作为电热微网内后备资源分配和后备节点选择参考指标的先进性。

Complex Network Based Comprehensive Evaluation Method of Topology for Electro-Thermal Microgrid

In view of the problem that the conventional evaluation method of microgrid is not appropriate for the multi-node coupling electro-thermal one, this paper develops a new topology evaluation system and comprehensive evaluation method based on complex network theory. The unidirectional and bidirectional graphs are applied to model the electro-thermal microgrid. Meanwhile, the network will be electro-thermal decoupled through multi-level network. The impact of nodes on sensibility, reliability and economy is quantized and critical nodes are searched according to several indices including complex-valued node degree, between centricity, efficiency coefficient, between-centricity-weighted node degree and efficiency-weighted node degree, which has high differentiation degree and can realize the comprehensive assessment of sensibility, reliability and economy for electro-thermal microgrid. The test example shows that the proposed method can quickly find the critical nodes of electric microgrid and thermal microgrid in unidirectional or bidirectional static network, which is useful even when the direction of edges changes or one node fails, proving the advancement of taking the whole evaluation system as a reference for backup resource allocation and backup node selection in electro-thermal microgrid.