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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,以及有源电力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,但IGBT的串联使用需要解决一系列综合问题。文中结合有源电压控制(AVC)和无源电阻电容二极管(RCD)均压技术,从栅极驱动模块、参考电压波形、过流保护模块、无源缓冲电路参数计算等方面系统地描述了串联IGBT均压的综合解决方案。在此基础上研制了由4只IGBT模块串联组成的阀臂,并进行了脉冲试验,脉冲放电过程中阀臂中的每只IGBT均压稳定,电压过冲小于5%。在此基础上研制了一套3kV,600kVA的三相电压源换流器(VSC)样机,稳定地进行了额定功率的整流与逆变运行,验证了该IGBT模块直接串联技术的有效性与实用性。
Due to the limitation of withstand voltage, a single insulated gate bipolar transistor (IGBT) can save energy and improve the power quality of the power grid, flexible DC transmission, high-voltage inverter, stationary synchronous compensator, and high-voltage high-power electric energy conversion such as active power filter Can not meet the demand, but the use of series is a better solution, but the series use of IGBT need to solve a series of comprehensive problems. In this paper, AVC and RCD voltage equalization techniques are used to systematically describe the series connection of gate drive module, reference voltage waveform, overcurrent protection module and passive snubber circuit parameter calculation. IGBT voltage integrated solution. On this basis, a valve arm consisting of 4 IGBT modules in series was developed and a pulse test was carried out. Each IGBT in the valve arm was voltage-stabilized and the voltage overshoot was less than 5% during the pulse discharge. On this basis, a prototype of 3kV, 600kVA three-phase voltage source converter (VSC) was developed and the rectifier and inverter operation of rated power were carried out steadily. The effectiveness and practicality of direct tandem IGBT module technology was verified Sex.