二阶选择谐波重复控制（second order selective harmonic repetitive control, SOSHRC）策略因其良好的频率适应性和动态性能被广泛应用于并网逆变器控制中。针对传统SOSHRC策略的稳定性分析方法复杂、稳定性标准较为保守等问题，提出一种新型二阶选择谐波重复-比例控制（second order selective harmonic repetitive control and proportional control, SOSHRC-PC）。首先，设计新型SOSHRC的结构和原理，并介绍新型SOSHRC-PC控制策略。然后，分析新型SOSHRC-PC控制器的稳定性和参数设计方法。最后，搭建基于新型二阶（6k±1）次谐波重复-比例控制的三相并网逆变器模型，仿真结果表明所提的控制策略具有良好的稳态和动态性能。

Second order selective harmonic repetitive control(SOSHRC) strategy with good frequency adaptability and dynamic performance, is widely used in grid-connected inverter control. To address the problems of the traditional SOSHRC strategy, such as the difficulty of using the stability analysis method and the conservative stability criterion, a novel second order selective harmonic repetitive control and proportional control(SOSHRC-PC) was proposed. Firstly, the structure and principle of the novel SOSHRC were designed, the novel SOSHRC-PC control strategy was introduced. Then, the stability and parameter design methods of the novel SOSHRC-PC controller were analyzed. Finally, a three-phase grid-connected inverter based on the novel second-order (6k ± 1) harmonic repetitive control and proportional control was constructed, and the simulation results show that the proposed control strategy has great steady state and dynamic performance.