单相级联H桥整流电路非线性控制策略

发布时间：2018-04-22 13:17

本文选题：单相级联H桥 + 静止坐标　；参考：《电工技术学报》2017年11期

【摘要】：针对电力电子牵引变压器输入级单相级联H桥(CHB)整流电路的非线性及扰动工况,提出一种基于静止坐标系的非线性优化控制策略。根据系统仿射非线性模型及微分几何理论,提出基于部分反馈线性化的零动态设计方案,对其线性部分采用二次型最优方法以确定反馈增益,并引入谐振环节以实现零相差跟踪;对于零动态则采用基于扩张状态观测器的自抗扰控制策略,以提高系统在负载大范围扰动时的控制品质。实验结果表明,该控制策略能提高CHB系统在电网电压及负载扰动时的动态响应速度,保证网侧电流及直流电压快速稳定调节,同时使网侧在单位功率因数下运行,各模块直流电压均衡。
[Abstract]:A nonlinear optimal control strategy based on static coordinate system is proposed for the nonlinear and perturbed conditions of single-phase cascaded H-bridge CHB rectifier circuit of power electronic traction transformer. Based on the affine nonlinear model and differential geometry theory, a zero-dynamic design scheme based on partial feedback linearization is proposed. The quadratic optimal method is used to determine the feedback gain for the linear part of the system. The resonant link is introduced to achieve zero phase difference tracking, and the extended state observer based active disturbance rejection control strategy is used to improve the control quality of the system when the load is large range disturbance. The experimental results show that the proposed control strategy can improve the dynamic response speed of the CHB system when the network voltage and load are disturbed, ensure the fast and stable regulation of the current and DC voltage of the network side, and make the network side run under the unit power factor. Each module DC voltage equalization.
【作者单位】：新能源电力系统国家重点实验室(华北电力大学);
【基金】：国家科技支撑计划(2013BAG24B02) 中央高校基本科研业务费专项资金(2015XS112)资助项目
【分类号】：TM461

【相似文献】