Optimal space vector pulse width modulation strategy of neutral point clamped three‐level inverter for output current ripple reduction

2017 ◽  
Vol 10 (12) ◽  
pp. 1638-1646 ◽  
Author(s):  
Wei Chen ◽  
Wenkai Dai ◽  
Zhiqiang Wang ◽  
Guozheng Zhang ◽  
Yan Yan ◽  
...  
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Neutral Point ◽  
Output Current ◽  
Space Vector ◽  
Ripple Reduction ◽  
Optimal Space ◽  
Current Ripple

scholarly journals Sector Subdivision Based SVPWM Strategy of Neutral-Point-Clamped Three-Level Inverter for Current Ripple Reduction

Energies ◽  
2019 ◽  
Vol 12 (14) ◽  
pp. 2734 ◽  
Author(s):  
Guozheng Zhang ◽  
Bingxu Wei ◽  
Xin Gu ◽  
Xinmin Li ◽  
Zhanqing Zhou ◽  
...  
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Small Region ◽  
Output Current ◽  
Switching Sequence ◽  
Output Performance ◽  
Ripple Reduction ◽  
Average Current ◽  
Current Ripple ◽  
Continuous Pulse

This paper presents a sector subdivision based space vector pulse width modulation (SVPWM) strategy with reduced current ripple for a three-level inverter. Using the output current ripple theory, closed-form expressions of average current ripple vectors for both continuous and discontinuous switching sequences are derived. Based on the sector and triangle distributions of conventional SVPWM strategy, each triangle is further divided into three small-regions. Then the switching sequence with the lowest magnitude of the average current ripple vector is applied in every small-region, so that the advantages of continuous pulse width modulation (CPWM) and discontinuous pulse width modulation (DPWM) under different modulation index conditions are combined to reduce the current ripple in the whole modulation range. The output performance of the proposed strategy is compared with the conventional CPWM and DPWM strategy, and experimental results verify that the proposed strategy could reduce the current ripple of three-level inverters effectively.

Discontinuous Space Vector PWM Strategy of Neutral-Point-Clamped Three-Level Inverters for Output Current Ripple Reduction

2017 ◽  
Vol 32 (7) ◽  
pp. 5109-5121 ◽  
Author(s):  
Changliang Xia ◽  
Guozheng Zhang ◽  
Yan Yan ◽  
Xin Gu ◽  
Tingna Shi ◽  
...  
Keyword(s):  
Neutral Point ◽  
Space Vector Pwm ◽  
Output Current ◽  
Space Vector ◽  
Ripple Reduction ◽  
Current Ripple

scholarly journals A Comprehensive AC Current Ripple Analysis and Performance Enhancement via Discontinuous PWM in Three-Phase Four-Leg Grid-Connected Inverters

Energies ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 4352 ◽  
Author(s):  
Riccardo Mandrioli ◽  
Aleksandr Viatkin ◽  
Manel Hammami ◽  
Mattia Ricco ◽  
Gabriele Grandi
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Performance Enhancement ◽  
Voltage Source ◽  
Complete Analysis ◽  
Switching Frequency ◽  
Output Current ◽  
Voltage Source Inverters ◽  
Switching Losses ◽  
Current Ripple

A complete analysis of the ac output current ripple in four-leg voltage source inverters considering multiple modulation schemes is provided. In detail, current ripple envelopes and peak-to-peak profiles have been determined in the whole fundamental period and a comprehensive method providing the current ripple rms has been achieved, all of them as a function of the modulation index. These characteristics have been determined for both phase and neutral currents, considering the most popular common-mode injection schemes. Particular attention has been paid to the performance of discontinuous pulse width modulation (DPWM) methods, including DPWMMAX and DPWMMIN, and their four most popular combinations DPWM0, DPWM1, DPWM2, and DPWM3. Furthermore, a comparison with a few continuous techniques (sinusoidal, centered pulse width modulations, and third harmonic injection) has been provided as well. Moreover, the average switching frequency and switching losses are analyzed, determining which PWM technique ensures minimum output current ripple within the linear modulation range at different assumptions. Numerical simulations and laboratory tests have been conducted to extensively verify all the analytical claims for all the considered PWM injections.

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