开关线性复合技术(SLH)及其在电力电子变换领域中的应用

The Technology of Switch-Linearity Hybrid and Its Application on Power Electronic Converter Device

电力电子装置的广泛使用,在电网中产生了大量的谐波,严重污染了电网。解决问题的方法就是消除谐波,当然最好的方法还是使系统不产生谐波,这就是本文的内容。在此提出了一种把PWM技术、LC滤波技术、线性功率放大电路相结合,即开关线性复合技术(SLH)。得到一种新型功率变换单元,分析了这种功率单元的结构特点及典型的拓扑结构,同时提出了这种功率变换的特点及相应补偿方法。最后,通过实验验证了这种功率单元的特性,证明由这种功率单元组成的功率变换装置具有低的谐波含量、转矩具有非常强的鲁棒性。

The power system is seriously polluted because more and more electronic devices are used and lots of harmonics are produced. A novel method that may not produce any harmonics is put up. It is named as switch-linearity hybrid technology abbreviated as SLH. In this technology, modulated PWM source, LC filter and linear power amplifier in some mode such as B or AB classic are used. The typical topologies of SLHs are listed and analysised. In order to overcome the shortages of SLHs, a compensator is used. Lastly, a series of experiments is carried out to prove that SLHs are of the characteristics of few harmonics and robustness.