Distributed load shedding for microgrid with compensation support via wireless network

作者：Xu, Qimin; Yang, Bo^*; Chen, Cailian; Lin, Feilong; Guan, Xinping

来源：IET Generation Transmission & Distribution, 2018, 12(9): 2006-2018.

DOI：10.1049/iet-gtd.2017.1029

• load shedding
• distributed power generation
• radio networks
• power system management
• supply and demand
• optimisation
• gradient methods
• multicast communication
• time division multiple access
• telecommunication scheduling
• distributed load shedding
• microgrid
• compensation support
• wireless network
• system collapse
• frequency stability
• fine-grained management
• supply-demand balancing
• load-shedding amount reduction
• real-power coordination
• optimisation problem
• subgradient method

Due to the limited generation and finite inertia, microgrids suffer from a large frequency and voltage deviation which can lead to system collapse. Thus, a reliable load shedding method is required to maintain frequency stability. A wireless network, benefiting from the high flexibility and low deployment cost, is considered as a promising technology for fine-grained management. In this study, a distributed load shedding solution via a wireless network is proposed for balancing the supply-demand and reducing the load-shedding amount. Firstly, the real-power coordination of different priority loads is formulated as an optimisation problem. To solve this problem, a distributed load shedding algorithm based on sub-gradient method is developed for gradually shedding loads. Using this method, power compensation can be utilised and has more time to decrease the power deficit, consequently reducing the load-shedding amount. Secondly, a multicast metropolis schedule based on time-division multiple access is developed. In this protocol, time slots are dedicatedly allocated to increase the response rate. A checking and retransmission mechanism is utilised to enhance the reliability of our method. Finally, the proposed solution is evaluated by using an NS3-Matlab co-simulator. The numerical results demonstrate the feasibility and effectiveness of our solution.

• 出版日期2018-5-15
• 单位上海交通大学