Patents by Inventor Erxi Wang

Erxi Wang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Optimal power flow-based hierarchical control method for distributed energy storage system (ESS)
    Patent number: 12119650
    Abstract: Disclosed is an optimal power flow-based hierarchical control method for a distributed energy storage system (ESS), where the method divides control of an energy storage cluster into three layers, performs primary and secondary control to realize intra-cluster control, and performs tertiary control to realize inter-cluster control. In the primary control, droop coefficients are set to realize intra-cluster basic power distribution. In the secondary control, a frequency/voltage shift and uneven power distribution that are caused by a droop are compensated for based on a consistency algorithm. In the tertiary control, a central controller is set, a solution of an optimal power flow is calculated and delivered to each cluster as a control signal, and the control signal is tracked in real time through the secondary control and the primary control. The method adjusts a reference voltage of each energy storage cluster without requiring a common bus.
    Type: Grant
    Filed: September 1, 2022
    Date of Patent: October 15, 2024
    Assignee: State Grid Hubei Electric Power Research Institute
    Inventors: Defu Cai, Kunpeng Zhou, Zuowei Wang, Xiaohui Li, Li Wan, Haiguang Liu, Rusi Chen, Wenna Wang, Tao Wang, Liangyi Zhang, Guanqun Sun, Erxi Wang
  • OPTIMAL POWER FLOW-BASED HIERARCHICAL CONTROL METHOD FOR DISTRIBUTED ENERGY STORAGE SYSTEM (ESS)
    Publication number: 20240222976
    Abstract: Disclosed is an optimal power flow-based hierarchical control method for a distributed energy storage system (ESS), where the method divides control of an energy storage cluster into three layers, performs primary and secondary control to realize intra-cluster control, and performs tertiary control to realize inter-cluster control. In the primary control, droop coefficients are set to realize intra-cluster basic power distribution. In the secondary control, a frequency/voltage shift and uneven power distribution that are caused by a droop are compensated for based on a consistency algorithm. In the tertiary control, a central controller is set, a solution of an optimal power flow is calculated and delivered to each cluster as a control signal, and the control signal is tracked in real time through the secondary control and the primary control. The method adjusts a reference voltage of each energy storage cluster without requiring a common bus.
    Type: Application
    Filed: September 1, 2022
    Publication date: July 4, 2024
    Inventors: Defu Cai, Kunpeng Zhou, Zuowei Wang, Xiaohui Li, Li Wan, Haiguang Liu, Rusi Chen, Wenna Wang, Tao Wang, Liangyi Zhang, Guanqun Sun, Erxi Wang