| 引用本文: | 周 晨,郑益慧,王 昕,李立学,周荔丹,张 杨.基于双环控制器的电容分裂式三相四线制DSTATCOM控制方法[J].电力自动化设备,2014,34(8): |
| ZHOU Chen,ZHENG Yihui,WANG Xin,LI Lixue,ZHOU Lidan,ZHANG Yang.Control strategy based on dual-loop controller for split-capacitor-type three-phase-four-wire DSTATCOM[J].Electric Power Automation Equipment,2014,34(8): |
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| 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。 |
| 关键词: 不对称负载 三相四线制 DSTATCOM 电容分裂式 双环控制器 PI控制 重复控制 无功补偿 |
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| 基金项目:基金项目：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 |
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| Control strategy based on dual-loop controller for split-capacitor-type three-phase-four-wire DSTATCOM |
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ZHOU Chen1, ZHENG Yihui1, WANG Xin1, LI Lixue1, ZHOU Lidan2, ZHANG Yang3
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1.Center of Electrical & Electronic Technology，Shanghai Jiao Tong University，Shanghai 200240，China;2.Key Laboratory of Control of Power Transmission and Conversion，Ministry of Education，Department of Electrical Engineering，Shanghai Jiao Tong University，Shanghai 200240，China;3.Songyuan Power Supply Company，Jilin Electric Power Co. Ltd.，Songyuan 138000，China
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| Abstract: |
| An analysis model is established aiming at the inaccuracy of split-capacitor-type three-phase-four-wire DSTATCOM used in the reactive power compensation for unbalanced load and its control strategy based on dual-loop controller is proposed aiming at the poor periodic signal tracking of the traditional PI controller. It combines the PI controller，which has quick response to instruction，with the repetitive controller，which has high accuracy of periodic signal control，and applies the dual-loop controller in the inner current loop of DSTATCOM to track the current. The design of the controller is analyzed in detail and verified by simulation and experiment. Results indicate that，the split-capacitor-type three-phase-four-wire DSTATCOM controlled by the proposed strategy has better compensation effect than by the traditional PI control method，guarantees the response speed，improves the accuracy of current tracking，achieves the reactive power compensation for the unbalanced load，reduces output current and THD，and improves the quality of grid-connection current. |
| Key words: unbalanced load three-phase-four-wire DSTATCOM split capacitor type dual-loop controller PI control repetitive control reactive power compensation |
