基于离散时间建模的模块化多电平变换器短路电流估算

Short-circuit faults are hazardous for high-power modular multilevel converters (MMCs). Hence, an accurate current calculation will be helpful for the design of the system protection. In this letter, a new method for the short-circuit current calculation based on discrete-time modeling is proposed. With commonly adopted nearest level modulation, the operating state during one period can be divided...