LI Kexin,HUANG Manyun,WEI Zhinong,et al.Asynchronous State Estimation for Transmission and Distribution Networks Based on Gauss-Newton Local Belief Propagation[J].Automation of Electric Power Systems,2026,50(18):108-116.
LI Kexin,HUANG Manyun,WEI Zhinong,et al.Asynchronous State Estimation for Transmission and Distribution Networks Based on Gauss-Newton Local Belief Propagation[J].Automation of Electric Power Systems,2026,50(18):108-116.DOI: 10.7500/AEPS20251211002.
Asynchronous State Estimation for Transmission and Distribution Networks Based on Gauss-Newton Local Belief Propagation
With the dramatic evolution of power system operation modes and the growing coupling between transmission and distribution networks
independent state estimation methods for transmission and distribution networks can no longer meet the requirements of unified dispatching and refined management of transmission and distribution networks
giving rise to coordinated transmission-distribution state estimation. Considering the drawbacks of centralized state estimation
such as heavy computational burden and asynchronous measurement updates between transmission and distribution networks
this paper proposes an asynchronous state estimation method for transmission and distribution networks based on Gauss-Newton local belief propagation. Firstly
a dynamic partitioned factor graph model is constructed according to the received boundary information of transmission and distribution networks. On this basis
a Gauss-Newton local belief propagation algorithm is developed to realize dynamic local updating of the factor graph model and fully distributed state estimation for the transmission network
alleviating the computational burden of the transmission network control center. Secondly
the asynchronous state estimation method based on Gauss-Newton local belief propagation is formulated to achieve real-time asynchronous information updating of each boundary node in the transmission network
which fully exploits the distributed and local computing advantages of the algorithm. Under both normal and bad measurement scenarios
the proposed method can effectively reduce the number of message transmitted of the factor graph model while guaranteeing estimation accuracy
thus saving computational resources.
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references
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