| 摘要 |
<p>The invention comprises a device for reduction of harmonics in three-phase (supply) systems comprising nonlinear devices comprising, for each phase, a circuit element with controllable impedance, comprising a first magnetic core, a first main winding wound round the core to produce a main magnetic field, and a first control winding wound round the core to produce a control magnetic field mainly orthogonal to the main magnetic field, where the first main winding is arranged for connection to said phase and the impedance of the circuit element is controllable by the current flowing in the control winding. Said device is characterised in that it further comprises one second winding for each phase wound around said first magnetic core to create a field mainly parallel to the main magnetic field, and that said second windings are connected to one another in a delta configuration. The invention comprises also a method and a system for reduction of harmonics in three-phase supply systems.</p> |
