| 引用本文: | 周鹏鹏,王峥夏,李志勇,等.继电保护PWM电流功放的三种闭环控制方法对比研究[J].电力系统保护与控制,2014,42(4):105-109. |
| ZHOU Peng-peng,WANG Zheng-xia,LI Zhi-yong,et al.Comparative study of three closed-loop control methods for PWM current amplifier of relay protection[J].Power System Protection and Control,2014,42(4):105-109 |
|
| 摘要: |
| 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。 |
| 关键词: 继电保护 PWM电流功放 输出滤波器 闭环控制方法 数值分析 |
| DOI：10.7667/j.issn.1674-3415.2014.04.017 |
| 分类号: |
| 基金项目: |
|
| Comparative study of three closed-loop control methods for PWM current amplifier of relay protection |
|
ZHOU Peng-peng1, WANG Zheng-xia1, LI Zhi-yong1, LI Shu-yan2, WANG Lan-jun1
|
|
1.Xuchang KETOP Electrical Apparatus Testing & Research Institute, Xuchang 461000, China;2.Xuchang Power Supply Company, Xuchang 461000, China
|
| Abstract: |
| 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. |
| Key words: protection relay PWM current amplifier output filter closed-loop control method numeric analysis |
