CAJ | 학술논문

在节约总电感用量的前提下，为了提高系统的滤波性能，选择 LCL 型滤波器作为配电网 STATCOM （D-STATCOM）的输出滤波器。LCL 型滤波器是一个三阶系统，采用直接入网电流控制时谐振峰的存在会影响系统的稳定性。为此，提出一种基于状态反馈的虚拟阻抗法用于抑制 LCL 型滤波器的谐振峰，从而避免无源阻尼法增大系统的损耗。由于电网电压中含有谐波含量会造成补偿电流畸变，从而不能准确跟踪其指令值，针对这一问题，提出一种多谐振比例谐振（PR）控制器，用于增大特定频率处电网电压对入网电流的输入阻抗，从而抑制电网谐波电压的扰动，优化补偿电流波形，提高电流追踪性能。仿真和实验结果证实了控制策略的有效性。
재절약총전감용량적전제하，위료제고계통적려파성능，선택 LCL 형려파기작위배전망 STATCOM （D-STATCOM）적수출려파기。LCL 형려파기시일개삼계계통，채용직접입망전류공제시해진봉적존재회영향계통적은정성。위차，제출일충기우상태반궤적허의조항법용우억제 LCL 형려파기적해진봉，종이피면무원조니법증대계통적손모。유우전망전압중함유해파함량회조성보상전류기변，종이불능준학근종기지령치，침대저일문제，제출일충다해진비례해진（PR）공제기，용우증대특정빈솔처전망전압대입망전류적수입조항，종이억제전망해파전압적우동，우화보상전류파형，제고전류추종성능。방진화실험결과증실료공제책략적유효성。
In order to improve the filtering performance of the system with small inductor,LCL filter is select-ed as the output filter of distribution static synchronous compensator (D-STATCOM).LCL filter is a three-order system,the resonant peak may result in the instability of system.State-feedback control based on virtual impedance is proposed to suppress the resonant peak,which reduces system losses compared with passive damping.The grid voltage harmonics result in the distortion of compensation current,which makes the com-pensation current not track its reference.A multi-resonance proportional resonant (PR)regulator is proposed to increase the grid input impedance at a specific frequency,which rejects the disturbance of grid harmonics and improves the current tracking performance.Simulation and experimental results prove the validity of this method.