CAJ | 학술논문

LCL滤波并网逆变器具有良好的应用前景。针对其电流控制，文中在分析了传统的单进网电流闭环方案局限性的基础上，结合有源阻尼控制机理，提出了一种基于极点配置的进网电流控制思想。其内环为极点配置环路，外环为进网电流比例-积分控制，可实现高带宽的电流控制。进一步提出内环配置两个极点为基波共轭极点，另两个极点为谐振频率处共轭极点的方案，实现谐振峰的有效抑制及基波频率处的高增益。分析并推演了其实现方法，包括反馈的选择和参数设计。最后，详细分析了所述方案控制性能并给出了实验验证。
LCL려파병망역변기구유량호적응용전경。침대기전류공제，문중재분석료전통적단진망전류폐배방안국한성적기출상，결합유원조니공제궤리，제출료일충기우겁점배치적진망전류공제사상。기내배위겁점배치배로，외배위진망전류비례-적분공제，가실현고대관적전류공제。진일보제출내배배치량개겁점위기파공액겁점，령량개겁점위해진빈솔처공액겁점적방안，실현해진봉적유효억제급기파빈솔처적고증익。분석병추연료기실현방법，포괄반궤적선택화삼수설계。최후，상세분석료소술방안공제성능병급출료실험험증。
The grid-connected inverter with an LCL filter has good application prospects.In connection with its current control, the limitations of the conversional single current closed-loop control are analyzed,and by referring to the active damping control mechanism,a pole placement-based current control strategy is proposed.Through proper feedback,the inner control is enabled to achieve pole placement and the outer grid current control to guarantee a high bandwidth with proportional and integral control.Then,a novel placement strategy is proposed,where two of the four poles are conjugate poles at fundamental frequency,and the remaining two are conj ugate poles at resonance frequency.Consequently,damping of the resonance peak and high loop gain at the fundamental frequency are both obtained.The implementation including feedback choice and parameter design is dealt with and derived.Finally,the control performance is investigated and verified by experiment.