Izvorni znanstveni članak
https://doi.org/10.30765/er.2251
Adaptive shoot-through duty ratio control methodology of stand-alone quasi Z-source inverter
Pritam Kumar Gayen
; Department of Electrical Engineering, Kalyani Government Engineering College, Kalyani, West Bengal, India
Pijush Kanti Dhara
; Department of Energy Science and Engineering, Indian Institute of Technology Bombay, Mumbai, India
Sudip Das
; Department of Electrical Engineering, JIS College of Engineering, Kalyani, West Bengal, India
Alok Shrivastav
; Department of Electrical Engineering, JIS College of Engineering, Kalyani, West Bengal, India
Sažetak
This paper presents an adaptive shoot-through duty ratio control methodology for a stand-alone three-phase quasi-Z-source inverter (qZSI). In practice, variable active and reactive load powers must be met by a qZSI-based stand-alone system. In this context, existing shoot-through control schemes for qZSI adjust the capacitor voltage or DC-link voltage at a fixed reference value. This causes extra voltage stresses on switches, high distortions, and an operating range reduction of the power inverter under variable load demands. On the contrary, the proposed shoot-through control scheme adjusts the shoot-through duty ratio adaptively based on load voltage feedback to improve performances. In this logic, the controllable shoot-through duty ratio facilitates various improved features in comparison to conventional schemes under load power variations. These features include reduced voltage stress across the switches, reduced distortions, and an extended operating range. The suggested proportional-integral (PI)-based scheme has a single control loop with a single measured quantity, i.e., sensing of load voltage only. The proposed concept has been verified via both simulation and experimental studies.
Ključne riječi
Quasi Z-source Inverter; Shoot-through Duty Ratio Control; Stand-alone Operation; Voltage Stress; Total Harmonic Distortion
Hrčak ID:
311080
URI
Datum izdavanja:
11.12.2023.
Posjeta: 258 *