A novel constant switching frequency strategy for a three-leg DSTATCOM
- Resource Type
- Conference
- Authors
- George, Vincent; Mishra, Mahesh K.; Sridharan, Srikanthan
- Source
- 2008 Canadian Conference on Electrical and Computer Engineering Electrical and Computer Engineering, 2008. CCECE 2008. Canadian Conference on. :000681-000684 May, 2008
- Subject
- Aerospace
Bioengineering
Communication, Networking and Broadcast Technologies
Components, Circuits, Devices and Systems
Computing and Processing
Engineered Materials, Dielectrics and Plasmas
Power, Energy and Industry Applications
Robotics and Control Systems
Switching frequency
Hysteresis
Leg
Inverters
Switches
Current control
Filters
STATCOM
Voltage
Robust control
constant frequency
distribution static compensator
three leg VSI
- Language
- ISSN
- 0840-7789
A novel current control strategy for a three-phase three-leg distribution static compensator is propounded in this paper. Improvement is achieved in terms of constancy and reduction in switching frequencies of all the switches of the voltage source inverter. The switching commands for one of the three inverter legs are given directly from a square pulse of a user-defined frequency. The other two legs are operated in hysteresis current tracking mode. The proposed controller unlike the other controllers allows the user to directly set the switching frequency of all the inverter switches and is devoid of any transformation, modulation, look-up table or complexity to achieve the objectives. The proposed scheme is validated through extensive simulation results in a three-phase three-wire distribution system with non-linear unbalanced load.