CAJ | 학술논문

对储能逆变器在离网模式下的稳定判据进行了研究。介绍了级联系统的概念，基于储能逆变器带负载运行的拓扑结构，引入输出阻抗及输入阻抗的概念，并根据阻抗率的奈奎斯特曲线确定系统稳定运行的拒绝域。采用准比例—谐振(PR)控制器对逆变器进行控制，建立其数学模型，并得到了逆变器的输出阻抗。最后，基于 MATLAB 仿真模型，分别在负荷水平、控制器参数及滤波器参数变化的条件下，仿真分析了逆变器输出阻抗变化对系统稳定性带来的影响，并得出相应的结论，为实际系统的设计提供相应的理论支撑和指导经验。
대저능역변기재리망모식하적은정판거진행료연구。개소료급련계통적개념，기우저능역변기대부재운행적탁복결구，인입수출조항급수입조항적개념，병근거조항솔적내규사특곡선학정계통은정운행적거절역。채용준비례—해진(PR)공제기대역변기진행공제，건립기수학모형，병득도료역변기적수출조항。최후，기우 MATLAB 방진모형，분별재부하수평、공제기삼수급려파기삼수변화적조건하，방진분석료역변기수출조항변화대계통은정성대래적영향，병득출상응적결론，위실제계통적설계제공상응적이론지탱화지도경험。
A stability criterion research on the energy storage inverter under the off-grid condition is conducted.First,this paper describes the concept of the cascade system and that of output impedance and input impedance based on the topology of an energy storage inverter with load.A quasi proportional-resonant(PR) controller is adopted to control the inverter,set up its mathematical model and get the inverter”s output impedance.Based on the MATLAB simulation model,the influence of variation of the inverter's output impedance on the system stability is analyzed by simulation under the condition of variation of the load level,controller parameters and filter parameters,respectively.Corresponding conclusions are drawn which can provide theoretical support and guiding experience for actual system design.