Research and Development of Monitoring and Early Warning Platform of Battery Energy Storage Power Station of New Power System

In the context of the “dual carbon” national strategy, the digitalization of security systems in all walks of life is an inevitable trend. As the core field of distributed new energy under the dual carbon policy, the safe access of wind and solar storage and distribution grid and emergency response are recognized as important research topics. The randomness, volatility, intermittency of photovoltaic wind power and the input of a large number of energy storage plants with two-way power flow into the distribution network lead to the transformation of the distribution network from the traditional power flow characteristics to the new distributed power flow characteristics, which further increases the complexity and variability of the load, and brings adverse effects to the safe operation of the distribution network. Therefore, energy storage systems are generally introduced to deal with the impact of the above new energy on the power grid. The energy storage system can realize multiple functions of absorption, frequency modulation and peak load cutting for renewable energy, and ensure the grid security of high proportion of new energy. Therefore, new energy storage power stations emerge as the times require. There are many challenges in the safe operation of the energy storage power station, such as the safe operation of the energy storage battery as the main energy storage carrier of the energy storage power station, and the safe operation of the wind turbine as the wind system. Behind the safety problems of these energy storage power plants are tens of thousands of related data monitoring, so it is necessary to sort out and monitor these data. Aiming at the above data monitoring of wind and solar integrated energy storage power station, this paper designs the monitoring system of wind and solar integrated energy storage power station, uses python language to write the main program, and uses the digital twin model to optimize the fault prediction module of the monitoring system. At the same time, the IEC60870-5 103 communication protocol introduced into the relay protection field is used to provide guarantee for the safe operation of the data exchange between the upper computer and the bottom layer.