CAJ | 학술논문

单个绝缘栅双极型晶体管（IGBT）由于耐压的限制，在节能和改善电网电能质量、柔性直流输电、高压变频器、静止同步补偿器，以及有源滤波器等高压大功率电能变换场合还不能满足需求，而串联使用是一种较好的解决方案。文中提出了一种适用于串联IGBT的自适应动态均压方案，详细分析了其工作原理，并通过仿真和实际电路对其进行了验证。在此基础上研制了一套由4组5只IGBT直接串联桥臂组成的全桥逆变演示系统，串联回路中的每只耐压1200V的IGBT稳定工作在900V，其电压利用效率达到了75％，具有较高的实用价值。
단개절연책쌍겁형정체관（IGBT）유우내압적한제，재절능화개선전망전능질량、유성직류수전、고압변빈기、정지동보보상기，이급유원려파기등고압대공솔전능변환장합환불능만족수구，이천련사용시일충교호적해결방안。문중제출료일충괄용우천련IGBT적자괄응동태균압방안，상세분석료기공작원리，병통과방진화실제전로대기진행료험증。재차기출상연제료일투유4조5지IGBT직접천련교비조성적전교역변연시계통，천련회로중적매지내압1200V적IGBT은정공작재900V，기전압이용효솔체도료75％，구유교고적실용개치。
Abstract： Due to the limits of its voltage withstanding capability, a single insulated gate bipolar transistor （IGBT） cannot meet the need of high-voltage and high-power conversion, such as for energy saving and power quality improvement, voltage source converter based high voltage direct current （VSC-HVDC） transmission, high-voltage frequency converter, static synchronous compensator （STATCOM）, active power filter, and so on. For such applications, serial-connected IGBTs are good choice. This paper proposes an adaptive dynamic voltage-sharing circuit for serial-connected IGBTs and discusses in details. The performance of the circuit is proved through simulations and experiments. Based on the proposed circuit, a full-bridge inverter demonstration system is developed that consists of four sets of five serial-connected IGBTs. Experimental results of the demonstration system show that each IGBT with a rated voltage of 1 200 V works stably at 900 V, while the voltage utilization efficiency is 75 %, indicating the highly practical value of the proposed circuit.