Optimal Configuration Analysis Of Energy Storage In Distribution Network Photovoltaic System And Cyber Physical Attack Research

Due to the instability of new energy power generation,it has a greater impact on the stable operation of the power grid.At the same time,the large amount of distributed energy access in the distribution network also increases the risk of cyber physical attack on the distribution network.With the development of energy storage technology,the combination of energy storage devices and new energy power generation in the distribution network can reduce the impact of new energy power generation volatility on the distribution network to a certain extent,and improve the utilization rate of solar power generation,and save expenses and gain income for power users.Therefore,it is of great practical significance to carry out research on the optimization of the configuration of the optical storage system in the distribution network,and to effectively identify,detect,and resist various cyber physical,in order to ensure the safe and stable operation of the power system.Aiming at the problem of optimal allocation of energy storage in photovoltaic system of distribution network,this paper analyzes the characteristics of residential load and industrial load,comprehensively considers the operating characteristics of photovoltaic system and battery energy storage system,combined with China's electricity price policy,with the goal of maximizing the net profit of optical storage system,builds the investment return model of the optical storage system with power balance and energy storage battery performance as constraints.Guided by the Jiangsu Province electricity price policy,lithium batteries are used as energy storage battery materials for energy storage optimization configuration,YALMIP solution is used in MATLAB,and IEEE 33 node system is used as the research object,from the perspective of equivalent load curve and photovoltaic self-consumption rate,the configuration results are analyzed,and the effects of the depth of discharge and battery type on the optimal storage configuration are analyzed,and the effects of the storage battery on the node voltage,voltage deviation,and system loss are analyzed.Aiming at the risk of cyber physical attack,this paper establishes a mathematical model of cyber physical attack on distribution network,taking load fluctuation and transmission line power fluctuation as the goal,taking into account load constraints,transmission line power constraints,generator power constraints,etc.,equality constraints and inequality constraints,set up two scenarios of physical attack and cyber physical attack,and use CPLEX to solve the optimization target in MATLAB.The simulation test in the IEEE 14 node standard system verifies the effectiveness of the proposed model,and provides a solution for power system operators to minimize the losses caused by cyber physical attack.