Risk Assessment for Hybrid AC/DC Systems Based on Transient Energy Function  

作　　者：Peng Sun Yun Teng Mingli Zhang Zhe Chen 

机构地区：[1]Shenyang University of Technology,Shenyang 110870,China [2]Liaoning Electric Power Co.Ltd.Economic Research Institute,Shenyang 110000,China [3]Department of Energy Technology,Aalborg University,Aalborg,DK DK 9220

出　　处：《CSEE Journal of Power and Energy Systems》2024年第4期1654-1663,共10页中国电机工程学会电力与能源系统学报（英文）

基　　金：supported by the National Key Research and Development Program of China(2017YFB0902100).

摘　　要：In order to accurately assess the risk of the hybrid AC/DC network under fault,a risk assessment method for the hybrid AC/DC system based on the transient energy function is proposed.First,based on the energy transfer relationship of the hybrid AC/DC power system,the transient energy function model of the hybrid AC/DC system is established.Based on the operating data of the power grid,the energy function is used as an efficiency variable,and the efficiency variable is integrated into the prior risk probability calculation of nodes in the network,and a Bayesian network-based risk assessment model of hybrid AC/DC system is established.Considering the dynamic update model of network cascading failures,the clique tree propagation algorithm is used to dynamically calculate the posterior risk probability of the node to realize the dynamic assessment of the network risk.Finally,the improved IEEE-39 node hybrid AC/DC system is used as an example for analysis.The results show that the proposed model can not only effectively evaluate the overall safety of the network,but also has feasibility in predicting faults,which can provide a theoretical basis for the stability control of the hybrid AC/DC system.

关 键 词：Cascading failure energy function hybrid AC-DC system risk assessment 

分 类 号：TM721.3[电气工程—电力系统及自动化]