基于混成自动机理论的间歇性电源并网多逆变器并联环流抑制方法

针对间歇性电源并网多逆变器并联运行环流突出、抑制困难的问题,论文提出运用混成自动机理论抑制间歇性电源并网多逆变器并联环流。论文首先详细分析间歇性电源并网多逆变器并联运行的混成特征和环流产生原理,得出逆变器输出电压与环流大小的数学关系。然后深入研究运用混成自动机理论建模与控制实现间歇性电源并网多逆变器并联运行环流控制的原理、方法,根据开关器件工作状态与逆变器输出电压的关系设计多逆变器并联环流混成控制器。最后,通过Matlab仿真平台进行仿真验证。仿真结果表明,本文所设计的环流控制器与相应的环流抑制方法的正确性与可行性,采用混成自动机模型能够实现较好的环流控制效果,能有效抑制多并联逆变器间的环流。

Shunt Loop Current Suppression Method of Intermittent Power Grid Networking-multi-inverter Based on Hybrid Automata Theory

In view of such problem as outstanding of loop current and difficult suppression of intermittent powersupplygrid?connectedmulti?inverterinparalleloperation,inthispaper,thehybridautomaticmachine theory to suppress the parallel power supply of the intermittent power supply grid?connected multi?inverter is proposed.Firstly,the hybrid characteristics and the principle of circulating current generation of parallel power supply grid?connected multi?inverters in parallel are analyzed in detail and the mathematical relationship between inverter output voltage and circulating current size is obtained.Then the in?depth study of the principle and method of parallel power supply multi?inverter parallel operation loop control using hybrid automatic machine theory modeling and control is carried out.According to the relationship between the working state of the switching device and the output voltage of the inverter,multiple inverters are connected in parallel.Finally,the simulation is verified by the matlab simulation platform.It is shown by the simulation result that the correctness and feasibility of the loop controller and the corresponding loop suppression method designed in this paper can achieve better circulation control effect by using the hybrid automata model,which can effectively suppress the circulation between multi?parallel inverters.