CAJ | 학술논문

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。
작위당전엄범응용적무공보상장치，정지동보보상기(STATCOM)재진행무공보상적동시，환가이실현대해파급불대칭분량적보상공능。STATCOM진행다목표보상시，비례적분(Proportion-Integral，PI)공제난이실현대해파급불대칭분량적무정차공제。위차，제출장일충개진형중복공제기술인입해파급불대칭분량적근종공제중，건립료기우중복공제화 PI 공제적복합공제기적모형，해공제기기가실현대직류신호적쾌속근종공제，우능현저가쾌대교류신호적향응속도。침대특정해파적선택성보상，채용 dq 좌표변환급체귀부립협변환(DFT)상결합적전류검측방법。최후，기우다 FPGA공제가구탑건료기우 H교적급련 STATCOM방진여실험평태，병통과방진급실험래험증공제책략적합이성。
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 thedq 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.