H桥级联型多电平高压调速系统低速畸变补偿控制技术

发布时间：2018-07-25 09:11

【摘要】：H桥级联型多电平高压交流调速系统在低转速运行工况下,变频器处于低幅值调制比逆变状态,加之死区效应等非线性因素影响,导致变频器自身输出电压会出现严重畸变。针对这个问题,提出一种含定子电流畸变补偿的复合矢量控制技术,并详细介绍含畸变补偿矢量控制技术的设计原理与应用过程,包括转速变化情况下的电动机定子电流的谐波分量提取,以及畸变校正补偿的具体实现。同时,利用最小二乘法,推导出一种基于PID的时滞补偿器以改善系统响应输出特性。最后,在Matlab/Simulink中搭建仿真模型进行仿真研究,并在搭建的小型样机平台上进行试验验证,效果良好,仿真与试验结果证明了所提方法的有效性。
[Abstract]:Under the condition of low speed operation, the inverter is in the state of low amplitude modulation ratio inverter and the influence of nonlinear factors such as dead-time effect, which leads to serious distortion of the output voltage of the inverter itself under the operating condition of H bridge cascade multilevel high voltage AC speed regulation system. In order to solve this problem, a compound vector control technique with stator current distortion compensation is proposed, and the design principle and application process of the vector control technology with distortion compensation are introduced in detail. It includes the harmonic component extraction of motor stator current and the realization of distortion correction compensation. At the same time, a delay compensator based on PID is derived by using the least square method to improve the response output characteristics of the system. Finally, the simulation model is built in Matlab/Simulink, and tested on a small prototype platform. The results of simulation and test show that the proposed method is effective.
【作者单位】：南京工程学院电力工程学院;清华大学智能技术与系统国家重点实验室;上海电气集团输配电有限公司;国网江苏省电力公司电力科学研究院;
【基金】：国家自然科学基金(51607084) 国家重点研发计划(2017YFB0903504) 江苏重点研发计划(BE2017169) 江苏自然科学基金(BK20130740) 江苏工业支撑计划(BE2014876) 江苏六大人才高峰项目(2015ZNDW008) 江苏配电网协同创新中心基金(XTCX2016-8) 国家电网指南项目(5210EF17002B)资助
【分类号】：TM464;TM921.51

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