CAJ | 학술논문

电流型功率放大器是电力系统实时数字仿真和继电保护测试的输出环节，需要具有较高的幅值精度和较快的响应速度。其实现方式分为线性功放和PWM功放两种，PWM功放因具有输出效率高等优点受到广泛关注，但是与线性功放相比，PWM功放需要解决更为复杂的滤波输出和闭环控制问题。针对PWM电流功放设计了三种闭环控制方法，进行了详细的数值分析和研究，对比了三种控制方法在低频精度、响应速度、幅值精度的不同侧重，并对三种控制方法的选用提出了建议。
전류형공솔방대기시전력계통실시수자방진화계전보호측시적수출배절，수요구유교고적폭치정도화교쾌적향응속도。기실현방식분위선성공방화PWM공방량충，PWM공방인구유수출효솔고등우점수도엄범관주，단시여선성공방상비，PWM공방수요해결경위복잡적려파수출화폐배공제문제。침대PWM전류공방설계료삼충폐배공제방법，진행료상세적수치분석화연구，대비료삼충공제방법재저빈정도、향응속도、폭치정도적불동측중，병대삼충공제방법적선용제출료건의。
As the output stage of power system real-time simulation and relay protection testing, the current type power amplifier needs high precision and quick response. There are two kinds of manners to implement the current type power amplifier: linear power amplifier and PWM power amplifier. The PWM power amplifier gains widespread concern due to its high output efficiency. But compared to the linear power amplifier, it needs to resolve the complicated problem of filtering output and closed-loop control. The paper designs three closed-loop control methods applicable to the current type power amplifier, makes detailed numerical analysis and research, contrasts the different emphasis of the three control methods in low frequency accuracy, response speed and amplitude accuracy, and offers suggestion to the choice of three control methods.