| 引用本文: | 王 跃,杨 昆,陈国柱.级联DSTATCOM补偿不平衡负载分相控制策略[J].电力自动化设备,2015,35(5): |
| WANG Yue,YANG Kun,CHEN Guozhu.Individual phase control of cascaded DSTATCOM for unbalanced load compensation[J].Electric Power Automation Equipment,2015,35(5): |
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| 摘要: |
| 针对三相四线制不平衡无功负载的特点，采用正、负序同步旋转变换分别提取基波正序、负序无功分量，同时采用静止坐标系下的分相控制策略，实现配电网静止同步补偿器（DSTATCOM）补偿模式的灵活性选择，可以只补偿负序、零序分量，充分利用DSTATCOM容量优先保证网侧电流平衡，也可在DSTATCOM容量允许的情况下同时补偿正序、负序和零序分量，进一步提高网侧功率因数。为提高分相控制的补偿精度且同时保证系统的动态性能，引入改进型的快速重复控制，设计了基于比例积分（PI）控制内环和快速重复控制外环的电流双环控制策略。最后在MATLAB／Simulink环境下建立三相四线制DSTATCOM仿真模型并搭建实验样机进行验证，仿真和实验结果证明了基于快速重复控制的分相控制策略能实现DSTATCOM对不平衡无功的高精度、选择性补偿。 |
| 关键词: 级联 DSTATCOM 不平衡负载 补偿 同步旋转变换 分相控制策略 快速重复控制 控制 |
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| 基金项目:国家自然科学基金资助项目（51177147）；浙江省重点科技创新团队项目（2010R50021） |
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| Individual phase control of cascaded DSTATCOM for unbalanced load compensation |
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WANG Yue, YANG Kun, CHEN Guozhu
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College of Electrical Engineering，Zhejiang University，Hangzhou 310027，China
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| Abstract: |
| According to the property of three-phase four-wire unbalanced reactive load，the positive-sequence or negative-sequence synchronous rotating transformation is employed to acquire the positive-sequence or negative-sequence reactive current respectively，while the individual phase control under stationary coordinates is adopted to flexibly select the compensation scheme of DSTATCOM （Distribution STATic synchronous COMpensator），either to only compensate the negative-sequence and zero-sequence currents for fully utilizing the capacity of DSTATCOM to ensure the grid-side current balance，or to simultaneously compensate the negative-sequence，zero-sequence and positive-sequence currents under the rated capacity of DSTATCOM to improve the grid-side power factor. In order to improve the compensation accuracy without sacrificing the dynamic performance of system，the improved FREP（Fast REPetitive） control is used in the design of double-loop current control based on the proportional integral inner loop and the FREP outer loop. The MATLAB／Simulink model of three-phase four-wire DSTATCOM is constructed and the experimental prototype is built for the verification. Both simulative and experimental results show that the accurate and selective compensation of unbalanced reactive power is achieved by the DSTATCOM under the FREP-based individual phase control. |
| Key words: cascaded DSTATCOM unbalanced load compensation synchronous rotating transform individual phase control strategy fast repetitive control control |
