TY - GEN
T1 - Constant boost control with third harmonic injection for quasi-Z source inverter used in PV grid-connected system
AU - Zhao, Zhengyu
AU - Elgendy, Mohammed A.
AU - Armstrong, Matthew
AU - Muhammad, Musbahu
PY - 2019/9/1
Y1 - 2019/9/1
N2 - Compared to the dual-stage inverter, quasi-Z-source inverter (qZSI) offers higher reliability and lower switch count but suffers from higher voltage stress on components. The qZSI is normally controlled by the simple boost control (SBC) method that adds reference signals to the sinusoidal PWM to generate the shoot-through state. This paper develops a constant boost control method with third harmonic injection. Compared to the SBC, the proposed control method increases the voltage boost and reduces the voltage stress on switches and passive components of the qZSI, making it suitable for PV grid-connected applications. The third harmonic signal is produced and injected in a way that keeps it in phase with the reference sinusoidal signals, regardless of the solar irradiance level. This reduces the total harmonic distortions (THD) and improves the output power quality. Simulation results are presented for validation of the theoretical analysis and controller design.
AB - Compared to the dual-stage inverter, quasi-Z-source inverter (qZSI) offers higher reliability and lower switch count but suffers from higher voltage stress on components. The qZSI is normally controlled by the simple boost control (SBC) method that adds reference signals to the sinusoidal PWM to generate the shoot-through state. This paper develops a constant boost control method with third harmonic injection. Compared to the SBC, the proposed control method increases the voltage boost and reduces the voltage stress on switches and passive components of the qZSI, making it suitable for PV grid-connected applications. The third harmonic signal is produced and injected in a way that keeps it in phase with the reference sinusoidal signals, regardless of the solar irradiance level. This reduces the total harmonic distortions (THD) and improves the output power quality. Simulation results are presented for validation of the theoretical analysis and controller design.
UR - http://www.mendeley.com/catalogue/constant-boost-control-third-harmonic-injection-quasiz-source-inverter-used-pv-gridconnected-system
U2 - 10.23919/EPE.2019.8915379
DO - 10.23919/EPE.2019.8915379
M3 - Conference contribution
SN - 9789075815306
SN - 9789075815313
T3 - 2019 21st European Conference on Power Electronics and Applications, EPE 2019 ECCE Europe
BT - 2019 21st European Conference on Power Electronics and Applications, EPE 2019 ECCE Europe
PB - IEEE
T2 - 21st Conference on Power Electronics and Applications (and Exhibition)
Y2 - 2 September 2019 through 5 September 2019
ER -