| 引用本文: | 赵学华,史丽萍,陈丽兵.基于复合控制的改进型级联STATCOM控制策略[J].电力系统保护与控制,2015,43(17):98-106.[点击复制] |
| ZHAO Xuehua,SHI Liping,CHEN Libing.A new current control strategy of cascaded STATCOM with composite control[J].Power System Protection and Control,2015,43(17):98-106[点击复制] |
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| 摘要: |
| 作为当前广泛应用的无功补偿装置，静止同步补偿器(STATCOM)在进行无功补偿的同时，还可以实现对谐波及不对称分量的补偿功能。STATCOM进行多目标补偿时，比例积分(Proportion-Integral，PI)控制难以实现对谐波及不对称分量的无静差控制。为此，提出将一种改进型重复控制技术引入谐波及不对称分量的跟踪控制中，建立了基于重复控制和PI控制的复合控制器的模型，该控制器既可实现对直流信号的快速跟踪控制，又能显著加快对交流信号的响应速度。针对特征谐波的选择性补偿，采用dq坐标变换及递归傅立叶变换(DFT)相结合的电流检测方法。最后，基于多FPGA控制架构搭建了基于H桥的级联STATCOM仿真与实验平台，并通过仿真及实验来验证控制策略的合理性。 |
| 关键词: 静止同步补偿器 谐波及不对称分量补偿 重复控制 电流检测 多FPGA架构 |
| DOI：10.7667/j.issn.1674-3415.2015.17.016 |
| 投稿时间：2014-11-19修订日期：2015-03-24 |
| 基金项目:高等学校博士学科点专项科研基金(201100951 10014) |
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| A new current control strategy of cascaded STATCOM with composite control |
| ZHAO Xuehua,SHI Liping,CHEN Libing |
| (School of Information and Electrical Engineering, China University of Mining and Technology, Xuzhou 221116, China) |
| Abstract: |
| As one of the widely used reactive compensation equipment, the static synchronous compensator (STATCOM) can simultaneously realize the compensation of reactive, harmonic and asymmetric currents. It is difficult to eliminate the steady-state error by using traditional PI controller when STATCOM needs to provide the compensation of harmonic and asymmetric currents. In order to solve these problems, the composite controller model composed of the repetitive and PI controllers is established, which not only fast tracks DC currents, but also significantly accelerates the response speed to AC current. To realize the selective harmonic compensation, a detection approach of reference harmonics based on the dq synchronous reference frame and DFT is proposed and applied to STATCOM. Moreover, based on the combined circuit topology with multi-field programmable gate array (FPGA), the simulation and experiment platform is employed to verify the feasibility and effectiveness of the control strategy. |
| Key words: static synchronous compensator harmonic and asymmetric currents compensation repetitive control reference current detection multi-FPGA structure |
