分布式电源并网与孤岛切换控制策略研究

Strategy for Grid-connected Operating Modes of Distributed Generation and Islanding Control

随着低碳环保意识的普及,以分布式发电为代表的清洁型能源越来越受到各国的关注。在分析了各类分布式发电的运行特性的基础上,分析了DG的并网运行和孤岛运行的控制策略。在此基础上,提出了V的控制原理,分布式电源孤岛运行和并网运行两种模式的模型及控制方法,并将上述控制原理应用到分布式电源并网与孤岛运行方式切换的控制环节中。最后在MATLAB/Simulink软件中建立分布式电源仿真模型,得到了系统在不同控制环节下的负荷电压质量以及DG输出功率等的仿真波形图,从而验证了上述切换控制策略的正确性和有效性。

With the popularization of low carbon environmental protection consciousness, distributed generation was considered to be the representative of the clean energy. And it has gained much attention among different countries. Based on the analysis of characteristics of various kinds of DG, the controlling strategy in both islanding and grid - connected operating modes was stressed. And the control principle of V - and the circuit models of DG operating modes was presented. The principle was used to improve the electrical energy quality of the load voltage when switching running modes. At last, DG simulation model was built in Matlab/Simulink platform, with different control links due to the principle above. So the switching control strategy is proved to be correct and effective.