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An enhanced line commutated converter (E-LCC) with embedded fully controlled sub-modules (SMs) to mitigate commutation failures (CFs) in high voltage direct current (HVDC) system is proposed in this study. The main feature of E-LCC is that each arm is composed of thyristor valves and series connected fully controlled SMs. The operation modes and voltage–current stresses of embedded SMs in E-LCC are...
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