A novel concept of DC voltage taps for multi-ended DC power supply system

Abstract

In recent years, dc power supply system has been increasingly attracting attention, because a solar power system and a storage battery trade their power by dc. A concept of HVDC Tap (High Voltage DC Tap) is known as an interesting method to build the dc power supply system. However, the circuit causes a high voltage ripple on the dc line and its transformer is afraid to be saturated by a dc bias magnetism. Authors have proposed to reduce the voltage ripple by employing double dc voltage taps in series with the dc line. In this paper, an improved dc voltage tap is proposed to prevent for the transformer from magnetic saturation. As one of its useful applications, this paper introduces a multi-ended dc power supply system with the double dc voltage taps and verifies its operating characteristics in case of balanced or unbalanced load conditions.