This part of IEC 62578 TS describes the operation conditions and typical characteristics of Active Infeed Converters of all technologies and topologies which can be connected between the electrical power supply system (lines) and a current or voltage D.C.-Side and which can convert electrical power (active and reactive) in both directions (generative or regenerative).Applications with Active Infeed Converters are realized together for example with d.c.-Sides of adjustable speed Power Drive Systems (PDS), Uninterruptible Power Systems (UPS), Active Filters, Photovoltaic Systems, Wind Turbine Systems etc. of all voltages and power sizes.Active Infeed Converte