交直流混合微电网系统建模及协调控制研究

Research of system modeling and coordination control of hybrid AC/DC micro-grid

微电网是指由分布式电源、能量转换装置、负荷监控和保护装置汇集而成的小型发配电系统,是一个能够实现自我控制和管理的自治系统。交直流混合微电网是分布式电源、配网以及负荷在种类多样化和低成本化发展进程中较为理想的产物。文章针对未来交直流互联的混合配网中高密度分布式电源、负荷接入和管控的应用场合,提出了一种新型的互为支撑的交直流混合微电网拓扑结构,建立了相应的仿真模型,并进行了交直流混合微电网的系统稳定性分析。仿真结果进一步验证了文中所建交直流混合微电网模型的正确性和所提交直流混合微电网及其方案的可行性。

Micro-grid is a distribution subnet which has a certain degree of self-control capabilities and self-regulation,including distributed generation,energy conversion device,load monitoring and protection device. Hybrid AC/DC micro-grid is an ideal and powerful topology model in the process of development of diversification and low cost for the distributed generation,the distribution network and the loads. In this paper,aiming at the access and control applications for the high density distributed power and loads in the hybrid AC/DC distribution network in the future,a new type of mutual support hybrid AC/DC micro-grid topology structure is proposed. Meanwhile,a corresponding simulation model is established. Based on this,stability analysis of proposed hybrid AC/DC micro-grid system is studied.Finally,simulation results further verified the correctness of the model of hybrid AC/DC micro-grid and the feasibility of the proposed scheme of hybrid AC/DC micro-grid.