Caused by the increasing use of DC power supplies based on rectifiers with capacitive smoothing, the harmonic voltage levels are continuously rising in public mains systems. Remedial measures are necessary as the compatibility level will be reached soon.
The "standard solution" for reducing the harmonic emission of these appliances by inserting an inductance into the circuit imposes some disadvantages.
A new dc power supply is presented which is able to compensate the harmonic currents of other devices by controlling itds main current according to the distortion of the mains voltage. Several control strategies as well as stability problems caused by the interaction of many of these power supplies and the mains system are discussed. Finally, the overall harmonic reduction is assessed under reasonable assumptions.
| Filename: | Unnamed file |
| Filesize: | 1.073 MB |
