利用电容电压纹波实现模块化多电平变换器的动态直流电压增强

High-power flexible dc links employ modular multilevel converters (MMC) for compact active power redirection in medium and high voltage grids. During contingencies, such converters may need to provide an enhanced active power capacity to avoid overload in vulnerable grid locations. This article achieves this target by using the capacitor voltage ripple margin of the MMC submodules (SM) to enhance ...