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本文简单介绍了东芝-三菱TMEIC公司生产的隔离变压器、TMdrive-XL75大功率中压变频器及高速同步防爆电机在西气东输二线的应用。TMdrive-XL75大功率中压变频器的特点是36脉冲二极管整流,输入谐波极低,;电压源技术,输入功率因数很高,电压源技术从根本原理上就消除了电网可能发生谐振的基础;5电平拓扑结构,输出线电压为9电平,输出波形好;采用高压IEGT器件,5电平结构;系统结构简单,效率很高,所用器件数量少,体积小,占地空间小。此外,介绍了高速同步防爆电机及其他辅助设备。包括电机正压防爆设备和冷却设备,变频器的控制系统、冷却系统等。由于西气东输西段位于祖国西北部,故针对实际运行中可能出现的问题列举了需要注意的问题,进而实现电驱压气站操作方便、节能降耗、工作可靠的应用目标。运行经验证明,与燃驱机组相比,电驱机组具有运行稳定、故障少、操作维护简单、运行维护费用低、效率高,节能降耗、清洁环保等优势。
This article briefly introduces Toshiba - Mitsubishi TMEIC’s isolation transformer, TMdrive-XL75 high-power medium-voltage frequency converter and high-speed synchronous explosion-proof motor in the second West-East Gas Pipeline applications. TMdrive-XL75 high-power medium-voltage frequency converter is characterized by 36-pulse diode rectifier, the input harmonic low, voltage source technology, the input power factor is high, the voltage source technology fundamentally eliminates the possibility of grid resonance may occur ; 5-level topology, the output line voltage of 9 levels, the output waveform is good; using high-voltage IEGT devices, 5-level structure; system structure is simple, high efficiency, the number of small devices, small size, small footprint. In addition, the introduction of high-speed synchronous explosion-proof motor and other auxiliary equipment. Including motor positive pressure explosion-proof equipment and cooling equipment, inverter control system, cooling system. As the western section of the West-East Gas Pipeline is located in the northwestern part of the motherland, the problems that may arise in actual operation are listed, so as to realize the application goal of easy operation, energy conservation and reduction of work load and reliable operation of the EPR station. Operating experience shows that, compared with the drive units, the unit has the advantages of stable operation, less faults, simple operation and maintenance, low operation and maintenance costs, high efficiency, energy saving, environmental protection and cleaning.