CAJ | 학술논문

文中基于三相逆变器输入阻抗特性对于分析电力系统的稳定性和控制电能质量的重要意义，通过小信号建模对三相逆变器的输入阻抗进行了分析，得出以下结论：增加负载不利于系统稳定性；控制参数与维持逆变器输入阻抗负阻抗特性有关，带宽越大，负阻抗特性的频段越宽；而LC滤波器参数对输入阻抗的影响主要体现在高频段，随着阻尼比的增加，其输入阻抗幅值增加。本文还提出一种设计逆变器新思路，即从满足系统稳定性要求出发设计逆变器参数，仿真结果表明，整流器与逆变器级联系统是稳定的。
문중기우삼상역변기수입조항특성대우분석전력계통적은정성화공제전능질량적중요의의，통과소신호건모대삼상역변기적수입조항진행료분석，득출이하결론：증가부재불리우계통은정성；공제삼수여유지역변기수입조항부조항특성유관，대관월대，부조항특성적빈단월관；이LC려파기삼수대수입조항적영향주요체현재고빈단，수착조니비적증가，기수입조항폭치증가。본문환제출일충설계역변기신사로，즉종만족계통은정성요구출발설계역변기삼수，방진결과표명，정류기여역변기급련계통시은정적。
Based on the important significance of three-phase inverter input impedance characteristics while analyzing the stability of power system and controlling the power quality. This paper gives the small signal model of three-phase inverter and deduce the impedance expressions of the inverter. The influence on input impedance is analyzed. Then the conclusions are drew: overload is not conducive to the stability of the system; negative impedance characteristics is related to the control parameters, the larger the bandwidth is, the greater the negative impedance characteristics spectrum is;The influence of LC filter parameters on the input impedance of inverters mainly manifests under high frequency conditions. The impedance amplitude increases as the damping ratio enlarges. This paper also puts forward a new idea on inverter design by which the inverter parameters meets all the requirements of system stability. The simulation results show that cascade system comprised of rectifier and inverter is stable.