Sistema y método de medida de las tensiones de las disposiciones capacitivas de los sub-módulos de un convertidor de potencia multinivel con almacenamiento distribuido de energía (MMC) y convertidor MMC

摘要

The invention relates to a system comprising: voltage sensors (SENs1, SENs2; SENi1, SENi2), each one being designed to measure the voltage between the terminals of an arrangement of sub-modules (SMs(1)…SMs(n); SMi(1)…SMi(n)) in series; and processing means for: determining that the voltage measurement carried out is a real measurement of voltage in the capacitor of an activated sub-module, and estimating the voltages in the capacitors of the deactivated sub-modules; or estimating the voltages in the capacitors of both the deactivated and activated sub-modules. The MMC converter includes the measurement system of the first embodiment. The method comprises combining real measurements with estimated measurements according to the state of activation/deactivation of the sub-modules of the MMC converter.