基于无偏LS-SVM的逆变器并联策略研究

Study of Parallel Control Strategy for Inverter Based on Non-bias LS-SVM

逆变器并联系统是一个参数多变的复杂非线性系统。针对此问题,提出了基于无偏最小二乘(LS)支持向量机(SVM)的逆模型前馈控制。鉴于突发干扰、建模误差以及并联时系统环流严重等问题,对逆模型控制附加比例积分微分(PID)反馈补偿,并根据瞬时均流技术,提出一种新的分布式并联复合控制方案。实验结果表明,复合控制下的并联逆变系统波形畸变率低,静态误差小,均流效果好,可实现系统冗余。

There are fickle parameters and complicated nonlinearity in a parallel inverter system.Aiming at this problem,a feed-forward controller with a inverse model based on non-bias least squares support vector machine is proposed.In consideration of modeling error,sudden interference and circulating current,the measures that contains proportional integral discrete（PID） feedback compensate and current sharing technique should be taken along with the inverse model control.A novel distributed parallel multiple control strategy is constructed and the experiment show that it can effectively reduce wave distortion,lower steady-state error,and enhance current sharing performance.