Reversible group BOOST converters

Using experience accumulated over more than 100 years working in the field of traction power substations, Sécheron has designed BOOST technology which offers a unique solution for fully reversible traction power substations. The BOOST uses an IGBT inverter (INV-I), which is connected to the secondaries of a traction transformer. When energy flows from the DC network during train deceleration, the INV-I recovers it as usual. During train acceleration, the INV-I injects reactive power into the transformer secondaries, thereby boosting the AC and DC voltage at the rectifier output. This innovative operating principle offers the following advantages: - Utilising a robust diode rectifier - Having complete control over the traction power substations by including an energy recovery system - Repurposing existing inverter modules designed for energy recovery - Improved characteristics compared to a thyristor rectifier: Enhanced power factor, Decreased harmonics, Reduced transformer power