Research On Oceanic Island Load Support Strategy Based On MES Power Supply Network

With the advancement of the national marine strategy,the development and construction of offshore islands have important economic and strategic value for China.However,the construction of a reliable load-supplied power supply network has become the biggest challenge for island development.Besides,the theoretical research and engineering application of the existing island micro-grid have provided a good solution for the continued supply of island power by using renewable energy power generation and energy storage technologies.On the other hand,high-permeability renewable energy power generation imposes higher requirements on the flexibility and reliability of the island microgrid.Due to the island's special characteristics(such as topography,soil structure,climate environment and frequent disasters),traditional power grids show high vulnerability and low cost performance when used in offshore islands.Therefore,this paper studies on the space-time complementary technology of intermittent,unstable power output and mobile energy storage(MES)response characteristics on the island to design the modeling method and operation mode of the discrete-continuous power supply network.Then,a load-guaranteed power supply strategy that will be applied to offshore islands after the disaster is proposed.The main contents are as follows.In the aspect of the construction and operation mode of the mobile energy storage power supply network,a method for constructing a time-delayed dynamic power supply network based on Agent-cell automata model is proposed.With the power demand of cellular load nodes,the geographic location and the power response characteristics of mobile energy storage,a “discrete” power supply mode was proposed to balance cell activity through mobile energy storage by the agent-based sensing and control function.Based on the actual data of Chau Island,the simulation verified the necessity and feasibility of building a mobile energy storage and power supply network.In the aspect of the hybrid power supply model-based ocean island micro-grid disaster repair strategy,an emergency-rescue repair network scheduling model based on a coupling network model of road network and micro-grid was constructed to solve the problem of offshore island microgrid load protection in the scenario of road network and power grid damage after disaster.Then a coordinated work plan for road repair and power repair was designed to minimize the weight loss all load nodes.Finally,the simulation results based on an actual scenario of Weizhou Island verify the superiority of the proposed scheme.