Active filters and advanced static VAr compensators (STATCOM) are hampered in their application at medium voltage levels (e.g. 13.8 kV) due to the need for a line-frequency interface transformer. A novel per-phase approach eliminates the need for a line-frequency transformer by series connection of slow-switching converters and a fast-switching PWM converter. The slow-switching converters operate in voltage-mode to counteract the utility voltage while the PWM converter operates in a current-control mode to control the injected current. Experimental results of a DSP-based laboratory prototype operating in steady state are presented to establish the concept validity. EMTP simulations address many practical aspects of this scheme-operation under steady stare conditions; transients such as startup, faults, sudden over- A nd under-voltages; and DC bus voltage regulation. The simulation results demonstrate the technical feasibility of this approach for implementing it in utility systems.
|Original language||English (US)|
|Title of host publication||8th International Conference on Harmonics and Quality of Power, ICHQP 1998 - Proceedings|
|Publisher||IEEE Computer Society|
|Number of pages||6|
|State||Published - 1998|
|Event||8th International Conference on Harmonics and Quality of Power, ICHQP 1998 - Athens, Greece|
Duration: Oct 14 1998 → Oct 16 1998
|Name||Proceedings of International Conference on Harmonics and Quality of Power, ICHQP|
|Other||8th International Conference on Harmonics and Quality of Power, ICHQP 1998|
|Period||10/14/98 → 10/16/98|
Bibliographical noteFunding Information:
This work has been carried out with the help of a grant from the National Science Foundation.
© 1998 IEEE.
Copyright 2018 Elsevier B.V., All rights reserved.
- Active Filters
- Power System Harmonics
- Reactive Power Control