The Simulation of Zero-Sequence Blocking Transformer (ZSBT)

The problem of zero-sequence current in a three-phase four-wire distribution system is more and more serious. ZSBT is new zero-sequence current filter equipment. The existing literature is only a brief description about the structure and principle of ZSBT, there is no perfect design method. This paper proposes a design method of ZSBT. We build the 3D simulation model of ZSBT by Ansoft to analyze the parameters such as inductance, coupling factor, and flux density. The simulation results proved that the design method of ZSBT is feasible.