PWM inverter induction motor drives with capacitive DC links are becoming more common. Using circuit analysis, physical measurement and numerical simulation, the paper investigates the generation of power-system harmonics by the PWM drive. It is shown that its harmonic characteristics differ from other nonlinear power-system loads and the drive can be more accurately represented as a voltage rather than a current type of harmonic source. This has implications for both analytic harmonic evaluation and practical filter design. In the paper, a modulation function model is developed which can be used to assess the impact of a PWM drive on a power system, when only limited design data are available. © IEE, 1998.
|Number of pages||7|
|Journal||IEE Proceedings: Generation, Transmission and Distribution|
|Publication status||Published - 1998|
- Nonlinear systems
- Power systems and plant
- Vollage-lype harmonic sources