CAJ | 학술논문

变频器在软启动、变频调速、优化设计、经济运行等方面具有明显优势，得到广泛应用。在电压暂降期间，变频器会因低压保护而跳闸，造成连续性生产企业非计划停运，带来巨大的经济损失和事故。根据变频器交－直－交的特性，结合电力电子技术，研究开发了两种基于直流供电技术的电压暂降保护系统。两种保护系统分别利用电网残压和蓄电池组作为能量来源，通过Boost DC／DC变换器，输出恒定的直流电压，为变频器直流母线提供恒定的直流电。实验数据和现场应用表明，该两种电压暂降保护系统可以确保变频器在电压暂降期间正常运行，大大提高了供电可靠性，为用户避免了大量的经济损失。
변빈기재연계동、변빈조속、우화설계、경제운행등방면구유명현우세，득도엄범응용。재전압잠강기간，변빈기회인저압보호이도갑，조성련속성생산기업비계화정운，대래거대적경제손실화사고。근거변빈기교－직－교적특성，결합전력전자기술，연구개발료량충기우직류공전기술적전압잠강보호계통。량충보호계통분별이용전망잔압화축전지조작위능량래원，통과Boost DC／DC변환기，수출항정적직류전압，위변빈기직류모선제공항정적직류전。실험수거화현장응용표명，해량충전압잠강보호계통가이학보변빈기재전압잠강기간정상운행，대대제고료공전가고성，위용호피면료대량적경제손실。
The inverter is widely used for its obvious advantages in soft start, variable frequency speed control, optimal design, economic operation and so on. During voltage sag, the inverter will be tripped because of low voltage protection, which would cause the important motor driven by inverter to stop working. This will result in non planned outage in the continuous production enterprises, leading to huge economic losses and even personal safety accidents and environment problems. According to the characteristics of inverter’s AC-DC-AC structure and combining power electronics technology two kinds of voltage sag protection (VSP) systems are researched and developed based on DC power supply technology which take network residual voltage and batteries as energy source respectively. And through Boost DC/DC converter, the VSP system outputs a constant DC voltage, supporting inverter’s DC bus. Experimental data and field applications show that the two kinds of VSP system can ensure the normal operation of inverter during voltage sag which greatly improves the reliability on demand side and saves a lot of economic loss for users.