基于双环控制器的电容分裂式三相四线制DSTATCOM控制方法

发布时间：2018-10-05 16:27

【摘要】：针对不对称负载无功补偿装置电容分裂式三相四线制DSTATCOM补偿精度问题,建立了分析模型,针对传统PI控制器对于周期性信号跟踪较差的问题,提出了基于双环控制器的电容分裂式三相四线制DSTATCOM控制方法。该方法将能够对指令快速响应的PI控制器与能够对周期性信号高精度控制的重复控制器相结合,构成双环控制器,并将其应用到DSTATCOM内环电流跟踪环节。对该控制器的设计进行了详细分析以及仿真与实验验证,结果表明采用所提出的双环控制方法,可以在保证响应速度的同时提高电流跟踪精度,实现电容分裂式三相四线制DSTATCOM对不对称负载的无功补偿功能,降低装置输出电流及畸变率,提高DSTATCOM并网电流质量,补偿效果较传统PI控制方法大幅提高。
[Abstract]:In order to solve the problem of compensation accuracy of capacitive split three-phase four-wire DSTATCOM, an analytical model is established, aiming at the problem of poor tracking of periodic signal by traditional PI controller. This paper presents a capacitor split three-phase four-wire DSTATCOM control method based on double loop controller. This method combines the PI controller which can respond to the instruction quickly and the repetitive controller which can control the periodic signal with high precision. The double loop controller is constructed and applied to the DSTATCOM inner loop current tracking link. The design of the controller is analyzed in detail and verified by simulation and experiment. The results show that the proposed dual-loop control method can improve the accuracy of current tracking while ensuring the response speed. The reactive power compensation function of capacitive split three-phase four-wire DSTATCOM for asymmetric load is realized, the output current and distortion rate of the device are reduced, the quality of DSTATCOM grid-connected current is improved, and the compensation effect is greatly improved compared with the traditional PI control method.
【作者单位】：上海交通大学电工与电子技术中心;上海交通大学电气工程系电力传输与功率变换控制教育部重点实验室;吉林省电力有限公司松原供电公司;
【基金】：国家自然科学基金资助项目(60504010) 国家高技术研究发展计划(863计划)资助项目(2008AA04Z129) 上海市自然科学基金资助项目(14ZR1421800) 流程工业综合自动化国家重点实验室开放课题基金资助项目~~
【分类号】：TM761

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