Research On Planning Technology Of Energy Storage Power Station To Improve The Reliability Of Power Grid

With the continuous promotion of power system transformation,the construction of additional energy storage equipment in the power grid has become an effective means to ensure the stable operation of the power grid.However,the increasing penetration in the power grid and the batch access of multiple loads and regulating equipment pose new challenges to the reliable operation of the distribution network.At the same time,due to the random output of the new energy generation form in the power grid and the random fluctuation of the load,the unstable factors generated in the operation of the distribution network are further enhanced.At this time,the planning of energy storage power stations needs to comprehensively consider the economic benefits of energy storage,the reliability of load power supply and the efficiency of grid operation.The planning work of energy storage power stations is more difficult.Therefore,this paper studies the optimal economic allocation model of energy storage power stations,the reliability evaluation of stochastic distribution network and the planning technology of energy storage power stations considering both economy and reliability.Firstly,quantitative research is conducted on the planning of energy storage power stations in the distribution network.With the goal of maximizing the benefits of energy storage power station,an optimal economic configuration model for energy storage power station is established.Simulation is conducted using RBTS-BUS6 and improved IEEE-33 model.With the support effects of centralized and distributed energy storage power station on various indicators in the power grid,the differential support effects of different construction models of energy storage power station on the power grid are compared.The important supporting role of energy storage power station in the transformation of the power grid to a new type of high permeability power grid is verified,and the planning results of energy storage power stations under the influence of different construction schemes and different indicators in the calculation example are discussed.Then,in order to study the impact of power grid reliability on energy storage planning and configuration,power grid reliability is added to the scope of indicators considered in this article.A distribution network reliability evaluation model with random operating conditions is established.Cluster sampling is used to generate uncertain new energy generation data based on real data,and a distribution network random state transition model considering the fault status of power grid equipment is generated based on Monte Carlo principle sampling.Using different distribution network reliability indicators to quantify the reliable power supply level of the power grid,a random distribution network reliability assessment considering load diversity and distribution network equipment failures is realized.Finally,considering the economy of energy storage power station and the reliability of distribution networks,a fault state model of power grid equipment is generated based on the Monte Carlo random sampling algorithm,and the optimal output model of energy storage power station is established.Simulation calculations are conducted using the RBTS-BUS6 model.The comprehensive evaluation method for multiple indicators is based on the Technology for Order Preference by Similarity to Ideal Solution(TOPSIS)comprehensive evaluation method,The technical characteristics and advantages of planning methods for energy storage power stations that take into account both economy and reliability are analyzed from multiple perspectives,which can be used as a reference for planning work for energy storage power stations.