【摘要】 提出一种新型谐波消除交流电压调节器方案,采用斩波方式AC-AC降压变换器结合输出串联补偿升压变压器实现负载电压的双向调节。其中降压变换器应用先进的谐波消除脉宽调制技术以实现交流系统侧所有低次谐波成分在输出负载端的消除,且其调制函数可以根据简便的前馈方法从输入电压信号中直接求解,因此具有良好的动态响应特性和实践可行性。2kVA样机的实测结果表明,所提出的方案在交流电压精确调节以及谐波抑制方面具有良好的表现。更多还原

【Abstract】 A kind of novel harmonic elimination AC voltage regulator is proposed. It is made up of a chopper type AC-AC buck converter and a series-compensation boost transformer to realize bi-direction voltage regulation of load terminal. In the regulator, an advanced harmonic elimination PWM technique is implemented to suppress low order harmonic components contained in ac mams. The modulation function is directly derived from the input voltage signals in a simple feed forward mode, which means a good dynamic response characteristic and a high feasibility in applications. Experimental result of a 2 kVA prototype shows that the proposed scheme has good performances in high precision AC voltage regulation and harmonic suppression.更多还原