直流微电网群分层控制的仿真模型分析

Simulation model analysis of DC micro electric network group layering control

能源和环境问题与人们息息相关,也影响着传统大电网的发展,新的可再生能源的合理利用越来越重要,分布式发电供电形式受到重视。分布式电源具有环保效应和可再生性,能够节省输变电成本,产生的电能也可以就地消耗,但同时存在可控性差、波动性大等局限性。微电网的提出很大程度上解决了分布式电源接入电网的问题,对微电网的结构进行建模,设计关键设备变换器,采取合适的控制策略。本文依据直流微电网电压和功率的关系,提出分层控制策略,利用matla/simulink软件进行仿真分析。

Energy and environmental issues are closely related to people,but also affect the development of traditional large power grid.The rational use of new renewable energy is becoming more and more important,and distributed generation power supply has been paid attention to.Distributed generation(DG) has environmental protection effect and renewability,which can save the cost of power transmission and transformation.The generated power can also be consumed locally,but it has some limitations such as poor controllability and great fluctuation.To a great extent,the micro-grid solves the problem of the distributed generation connected to the grid.The structure of the micro-grid is modeled,the key equipment converter is designed,and the appropriate control strategy is adopted.According to the relationship between DC microgrid voltage and power,a hierarchical control strategy is proposed and simulated by matla/Simulink software.