变拓扑N脉波相控整流器的电流预测控制方法  

Predictive current control method of N-pulse flexible-topology thyristor rectifier

作　　者：张达敏[1] 王仕韬 林辉品[1] 吕征宇[1] 

机构地区：[1]浙江大学电气工程学院,浙江杭州310027 [2]国网技术学院,山东济南250061

出　　处：《浙江大学学报（工学版）》2014年第7期1304-1311,共8页Journal of Zhejiang University：Engineering Science

基　　金：国家自然科学基金资助项目(51177148)

摘　　要：为了减小网侧谐波电流,改善电能质量,提出N脉波变拓扑相控整流器(FTTR)的一般结构形式,并对工作模式、拓扑切换策略及拓扑切换的过渡过程进行分析,在此基础上利用平均值电流预测控制算法计算晶闸管触发时刻,实现快速的电流动态响应.鉴于预测控制算法对电感参数变化敏感的问题,提出应用最小二乘法在线校正电感参数,消除模型参数变化引起的电流稳态误差.以24脉波FTTR为研究对象进行仿真和实验分析,仿真和实验结果验证了N脉波FTTR的可行性以及电流预测控制算法的有效性.A general structure of the N-pulse flexible-topology thyristor rectifier（FTTR）was proposed in order to mitigate the harmonic-current injection and improve the power quality.Then its operating mode and topology-switching strategy as well as transient performance were discussed.The predictive averagecurrent control algorithm was presented to calculate the firing instance and thereby achieve the fast current response.As the predictive average-current control method is sensitive to the variation of the inductance value,the least square method（LSM）was employed to execute an on-line parameter correction of the inductor and eliminate the steady-state error of the inductor current.A simulation model and its corresponding experimental prototype based on a 24-pulse FTTR were developed.Simulation and experimental results showed the feasibility of the proposed N-pulse FTTR and the effectiveness of the current control method.

关 键 词：N脉波变拓扑整流器 平均值电流预测控制 在线参数校正 最小二乘法 

分 类 号：TM46[电气工程—电器] TM13