Title :
Parallel operation of single phase inverter modules with no control interconnections
Author :
Tuladha, A. ; Jin, H. ; Unger, T. ; Mauch, K.
Author_Institution :
Dept. of Electr. Eng., British Columbia Univ., Vancouver, BC, Canada
Abstract :
To provide reliable power under scheduled and unscheduled outages requires an uninterruptible power supply (UPS) which can be easily expanded to meet the needs of a growing demand. A system suck as this should also be fault tolerant and include the capability for redundancy. These goals can be met by paralleling together smaller inverters if a control scheme can be designed to allow them to operate independently yet still share the load. We have developed a control technique for operating two or more single phase inverter modules in parallel with no auxiliary interconnections. This technique uses frequency, fundamental voltage, and harmonic voltage droop to allow independent inverters to share the load in proportion to their capacities. Simulation results are provided to prove the concept
Keywords :
invertors; power control; power system harmonics; reactive power control; redundancy; uninterruptible power supplies; UPS; fault tolerant; frequency; fundamental voltage; harmonic voltage droop; load sharing; parallel operation; reactive power control; real power control; redundancy capability; simulation; single phase inverter modules; uninterruptible power supply; Frequency; Impedance; Integrated circuit interconnections; Master-slave; North America; Power supplies; Pulse width modulation inverters; Scheduling; Uninterruptible power systems; Voltage control;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 1997. APEC '97 Conference Proceedings 1997., Twelfth Annual
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-3704-2
DOI :
10.1109/APEC.1997.581439