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This paper presents a new approach to integrate a fluctuating renewable power source like PV array into a conventional UPS by only modifying existing UPS firmware without needing any additional power converter. The paper also presents PV-UPS integrated system simulation developed using MATLAB/SIMULINK and hardware testing results for a 550kVA UPS interfaced with 30kW of solar panels. Proposed solution...
This paper presents a low voltage (400V) hardware prototype of a fast acting medium voltage DC circuit breaker. Simulation results obtained using PLECS software and hardware testing results are also presented for the same prototype. The prototype serves as a proof of concept showing implementation of firmware logic capable of interrupting DC fault current within 4.042 micro-seconds from the instant...
In this paper, a comparative study of 1200V Silicon IGBTs with Silicon Carbide (SiC) MOSFETs is presented for a 6kVA single-phase 230V online Uninterruptible Power Supply (UPS) system. The UPS is first tested with the 1200V silicon IGBT/Diode devices (2 parallel 34A IGBT/diode) and then the inverter devices are replaced by next generation SiC 1200V MOSFET/Diode devices (2 parallel 20A MOSFET/10A Diode...
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