CAJ | 학술논문

　　在电网不平衡下并网逆变器的控制策略中需对电网电压进行正负序分量准确检测，还需要对电流的正负序分量进行控制。研究了一种谐振调节器，该调节器是由传统的二阶谐振（SOGI）调节器降阶得到，称之为降阶谐振（ROR）调节器，理论分析表明，其能在特定频率下对交流量的正序或负序分量实现独立的无静差调节。将其应用在电网电压和电流的正负序检测中，提出一种新的电网电压和电流正负序检测方法，该方法加入了调节器的积分系数，角频率由锁相环反馈得到，实现自适应调节。仿真和实验验证了所提方法动态响应快，能在静止坐标系下分别对电网基波正负序分量实现无差跟踪，并具有一定的抗谐波干扰能力。
　　재전망불평형하병망역변기적공제책략중수대전망전압진행정부서분량준학검측，환수요대전류적정부서분량진행공제。연구료일충해진조절기，해조절기시유전통적이계해진（SOGI）조절기강계득도，칭지위강계해진（ROR）조절기，이론분석표명，기능재특정빈솔하대교류량적정서혹부서분량실현독립적무정차조절。장기응용재전망전압화전류적정부서검측중，제출일충신적전망전압화전류정부서검측방법，해방법가입료조절기적적분계수，각빈솔유쇄상배반궤득도，실현자괄응조절。방진화실험험증료소제방법동태향응쾌，능재정지좌표계하분별대전망기파정부서분량실현무차근종，병구유일정적항해파간우능력。
Grid connected inverter’s control strategy needs to detect the positive- and negative-sequence component of voltages and currents under unbalanced voltage condition in the power system. This paper studies a kind of resonant controller called the reduced order resonance (ROR) regulator, which is reduced from the traditional second order generalized integrator (SOGI). The regulator is able to achieve floating control of alternating voltage’s positive- or negative-component independently at a given frequency. A new positive- and negative-sequence component detecting method is proposed. Integral factor is added in the regulator and the angular frequency is obtained by phase locked loop’s feedback. Simulation and experiment results show the proposed method can achieve zero error tracking of grid voltage’s positive- and negative- component in stationary reference frame quickly, and has fast dynamic response and a certain degree of harmonic suppression ability. This work is supported by State Key Laboratory of Control and Simulation of Power System and Generation Equipment of Tsinghua University.