CAJ | 학술논문

针对数字控制三相逆变系统,对其在同步旋转坐标系比例控制下的局部振荡行为进行了分析.通过建立系统各个状态变量离散迭代方程,针对这个高阶系统提出了各种不稳定行为的解析判别式.以此为基础,得到了系统产生局部振荡的条件,以及控制参数与局部振荡点的关系.最后,通过Simulink仿真以及电路实验证明了理论分析的正确性以及有效性.研究结果揭示了三相逆变系统的运动行为及各相之间的内在耦合关系,并准确地描述了系统产生的局部振荡现象.
침대수자공제삼상역변계통,대기재동보선전좌표계비례공제하적국부진탕행위진행료분석.통과건립계통각개상태변량리산질대방정,침대저개고계계통제출료각충불은정행위적해석판별식.이차위기출,득도료계통산생국부진탕적조건,이급공제삼수여국부진탕점적관계.최후,통과Simulink방진이급전로실험증명료이론분석적정학성이급유효성.연구결과게시료삼상역변계통적운동행위급각상지간적내재우합관계,병준학지묘술료계통산생적국부진탕현상.
A partial oscillation phenomenon in a digital-controlled three-phase inverter system, which is controlled by proportional controller in synchronous rotating reference frame, is analyzed in this paper. First, the discrete-time model of the system is derived. Then, a dynamics analysis scheme for this type of system is proposed. In addition, the underlying mechanism of the partial oscillation phenomenon occurring in this system is analyzed. The factors, which will cause the partial oscillation, are exactly predicted by analytical expressions. Finally, the theoretical results are verified by both simulations and experiments. These conclusions can provide an insight into the dynamics of the system.