Research On Multi-source Cooperative Elastic Recovery Strategy Of Distributed Energy System

The emergence of new energy power generation technology has caused distributed power as the primary energy source to become a crucial element of power grid operation.However,under harsh conditions such as natural disasters,due to the randomness and volatility of new energy output.distributed energy systems are slightly fragile when operating independently,and face the problems of insufficient controllable capacity and low energy efficiency.Therefore,this paper focuses on the scenario of independent operation of the distributed energy system under the disaster risk,conducts research on the power supply recovery scheme,elastic operation adjustment and multi-source collaborative operation scheme of the distributed energy system,and proposes a multi-source collaborative elastic recovery strategy for the distributed energy system.Results of the simulation analysis demonstrate the efficacy of the recovery plan put forward in this paper.This paper’s outcomes are summarized thus:Aiming at the problems of insufficient power reserve and low operating flexibility when distributed energy systems face disaster risks,a three-stage elastic power supply planning scheme for distributed energy systems based on disaster prediction is proposed.First of all,the effect of disaster prediction on improving the power supply elasticity of distributed energy systems is analyzed.Then,based on the disaster prediction information,considering the optimal deployment of emergency power vehicles and power transfer,a three-stage power supply recovery elasticity improvement scheme for the distribution network in the face of disasters,namely prevention,resistance and recovery,is proposed.Finally,through the analysis of a numerical example,it is verified that the proposed strategy can significantly improve the defense and resilience of the distributed energy system under disasters,and improve the resilience of the system’s recovery operation.In view of the fact that the current distributed energy system operation scheduling mode does not consider the power support capability of new energy sources.In the absence of large power grid support,the independent operation of new energy sources is likely to cause power imbalance and system collapse.The source side of the distributed energy system and the elastic regulation ability of the grid side were evaluated.On this basis,the effectiveness of the fast power regulation scheme is verified by simulation for wind and photovoltaic power sources with weak current power support capabilities,and the regulation capacity that can be used for fast power support response is analyzed and calculated.Then,the estimate calculates the spare capacity available for elastic support of the controllable load.Finally,a fast power regulation control system framework for distributed energy systems is proposed to realize fast transmission of system regulation commands.Aiming at the problems of insufficient backup capacity and low reliability of power supply in independent operation of distributed energy systems,a multisource collaborative operation scheme based on rapid adjustment of new energy is proposed.First,a multi-source cooperative restoration operation model is established based on the elastic upgrade power supply restoration scheme.Then,considering the fluctuation of power supply and load in the island,and based on the fast power regulation technology of new energy,the elastic operation control strategies of the island under sufficient power supply,insufficient power supply and extreme conditions are formulated respectively.Finally,the case analysis verifies that the coordinated operation scheme can reserve sufficient spare capacity while ensuring the value of load recovery,and significantly improve the system’s operational flexibility and power supply recovery capability.