Novel PWM line conditioner with fast output voltage control
Novel PWM line conditioner with fast output voltage control
复制标题
具有快速输出电压控制功能的新型 PWM 线路调节器
DOI：
10.1049/ip-epa:19981532
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
B. Kwon
中科院分区：
文献类型：
--
作者：
B. Min;B. Kwon
提出了一种具有快速输出电压控制的新型脉宽调制（PWM）线路调节器。线路调节器由 PWM 交流斩波器和用于串联电压补偿的变压器组成。在脉宽调制交流斩波器中，实现了解决换相问题的适当开关操作。该电路中可以使用市售的功率半导体模块，并且再生直流缓冲器直接连接到功率半导体模块以吸收线路杂散电感中存储的能量。这些再生直流缓冲器的结构非常简单，仅由一个电容器组成，没有放电电阻或复杂的缓冲器能量再生电路。因此，所提出的交流斩波器具有高效率和高可靠性。通过快速检测输出电压来控制线路调节器的输出电压。使用时间加权二次性能指数设计控制器的最佳增益，提供具有小超调和足够阻尼的输出。仿真和实验结果还表明，所提出的线路调节器具有良好的动态和稳态性能以及高质量的输出电压。
A novel pulse-width modulated (PWM) line conditioner with fast output voltage control is proposed. The line conditioner is made up of a PWM AC chopper and a transformer for series voltage compensation. In the PWM AC chopper, a proper switching operation for solving the commutation problem is achieved. Power semiconductor modules which are commercially available can be used in this circuit and regenerative DC snubbers are attached directly to power semiconductor modules to absorb the energy stored in line stray inductance. These regenerative DC snubbers have a very simple structure consisting of a capacitor only with no discharging resistors or complicated regenerative circuit for snubber energy. Therefore the proposed AC chopper gives high efficiency and high reliability. The output voltage of the line conditioner is controlled using rapid sensing of the output voltage. The optimal gains of the controller giving an output with small overshoot and adequate damping are designed using the time-weighted quadratic performance index. It is also shown using simulation and experimental results that the proposed line conditioner gives good dynamic and steady state performances with high quality output voltage.