Peng Sun, Yun Teng, Mingli Zhang, 等. Risk Assessment for Hybrid AC/DC Systems Based on Transient Energy Function[J]. 中国电机工程学会电力与能源系统学报(英文), 2024,10(4):1654-1663.
Peng Sun, Yun Teng, Mingli Zhang, et al. Risk Assessment for Hybrid AC/DC Systems Based on Transient Energy Function[J]. CSEE Journal of Power and Energy Systems, 2024, 10(4): 1654-1663.
Peng Sun, Yun Teng, Mingli Zhang, 等. Risk Assessment for Hybrid AC/DC Systems Based on Transient Energy Function[J]. 中国电机工程学会电力与能源系统学报(英文), 2024,10(4):1654-1663.DOI: 10.17775/CSEEJPES.2021.00860.
Peng Sun, Yun Teng, Mingli Zhang, et al. Risk Assessment for Hybrid AC/DC Systems Based on Transient Energy Function[J]. CSEE Journal of Power and Energy Systems, 2024, 10(4): 1654-1663.DOI: 10.17775/CSEEJPES.2021.00860.
Risk Assessment for Hybrid AC/DC Systems Based on Transient Energy Function
摘要
Abstract
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.