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LOSS DETERMINATION METHOD BASED ON MODULAR MULTI-LEVEL VOLTAGE SOURCE CONVERTER

机译：基于模块化多电平电压源变换器的损耗确定方法

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A loss determination method for a flexible direct-current converter based on the modular multi-level technology. The method comprises the following steps: step 1: determining a current of a single-phase voltage source converter; step 2: determining the conduction loss of the voltage source converter; step 3: determining the switch loss of the voltage source converter; and step 4: determining the total three-phase loss of the voltage source converter. The method effectively calculates the average current and the effective current of an insulated gate bipolar transistor (IGBT) of an upper-half bridge arm/a free-wheeling diode (FWD) of a lower-half bridge arm of a converter sub-module, or a free-wheeling diode (FWD) of the upper-half bridge arm/an insulated gate bipolar transistor (IGBT) of the lower-half bridge arm, so that a relationship between the loss of the insulated gate bipolar transistor (IGBT) and the free-wheeling diode (FWD) in the sub-module, and a modulation factor, a power factor, an active transmission power and the like of a flexible direct current power transmission system can be reflected, thereby visualizing complex problems.
机译：基于模块化多级技术的柔性直流变换器的损耗确定方法。该方法包括以下步骤：步骤1：确定单相电压源转换器的电流;步骤2：确定电压源转换器的导通损耗;步骤3：确定电压源转换器的开关损耗;步骤4：确定电压源转换器的总三相损耗。该方法有效地计算了转换器子模块的上半桥臂的绝缘栅双极晶体管（IGBT）/下半桥臂的续流二极管（FWD）的平均电流和有效电流，或上半桥臂的续流二极管（FWD）/下半桥臂的绝缘栅双极晶体管（IGBT），从而使绝缘栅双极晶体管（IGBT）的损耗与子模块中的续流二极管（FWD），以及柔性直流电力传输系统的调制因子，功率因子，有功传输功率等都可以反映出来，从而使复杂的问题可视化。

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