Modulation techniques for three-phase three-level NPC inverters: A review and a novel solution for switching losses reduction and optimal neutral-point balancing in photovoltaic applications

Calligaro, Sandro; Pasut, Fabio; Petrella, Roberto; Pevere, Alessandro

doi:10.1109/apec.2013.6520725

Cited by 26 publications

(8 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…where right part of the equation is the matrix with homopolar voltages corresponding to each PWM pattern. Its members are defined as following [8,9]:…”

Section: Space Vector Modulation For 3-level Voltage Source Invertermentioning

confidence: 99%

“…Moreover, 3-level inverter control may have up to 5 possible PWM patterns for the same referenced voltage vector depending on voltage magnitude and angle that makes the selection of the optimal PWM pattern even more complex. Some previously conducted researches [8] solved the problem but these solutions do not take into account the difference in parameters of semiconductor switches for the AC and bridge inverter parts.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A PWM Strategy for the Minimisation of Losses in a 3-level T-type Voltage Source Inverter

Anuchin

Shpak

Gulyaeva

et al. 2018

2018 International Symposium on Power Electronics, Electrical Drives, Automation and Motion (SPEEDAM)

View full text Add to dashboard Cite

This paper discusses the approach for the witching loss minimisation in a 3-level inverter. It utilises a model predictive method which is used for evaluation of both the switching loss and voltage unbalance. The method is based on the cost functions implemented to provide simultaneous minimisation of loss and DC link voltage balance control. The simulation results shown that the total loss is reduced in 15% compared to a standard PWM strategy for a 3-level inverter operating at PWM frequency of 16 kHz.

show abstract

“…where right part of the equation is the matrix with homopolar voltages corresponding to each PWM pattern. Its members are defined as following [8,9]:…”

Section: Space Vector Modulation For 3-level Voltage Source Invertermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A PWM Strategy for the Minimisation of Losses in a 3-level T-type Voltage Source Inverter

Anuchin

Shpak

Gulyaeva

et al. 2018

2018 International Symposium on Power Electronics, Electrical Drives, Automation and Motion (SPEEDAM)

View full text Add to dashboard Cite

show abstract

“…The DSPWM is equivalent to third harmonic injection PWM (THIPWM) as far as the maximum voltage range for the linear operation mode is concerned. It eliminates the low frequency oscillation from the neutral point; however it increases the commutation considerably [30]. This is because of the common switching instant as shown in Fig.…”

Section: ) Single-carrier Based Dspwm Control Strategymentioning

confidence: 99%

A Hybrid PWM-Based DC-Link Voltage Balancing Algorithm for a Three-Level NPC DC/AC Traction Inverter Drive

Choudhury

Pillay

Williamson

2015

IEEE J. Emerg. Sel. Topics Power Electron.

View full text Add to dashboard Cite

This paper presents a hybrid pulse-width modulation (H-PWM) technique, for a 3-level neutral point clamped (NPC) electric vehicle (EV) traction inverter drive. The proposed strategy depicts the advantages of both classic space-vector pulsewidth modulations (SV-PWM) as well as carrier-based PWM.The duty-cycles for the traction inverter switches are calculated using carrier-based PWM, to reduce the computational time and control complexity of the system. The redundancies of the switching states are then used to balance the 2 DC-link capacitor voltages, similar to the SV-PWM based strategy. The proposed scheme is capable of maintaining the difference between the 2 DC-link capacitor voltages for a wider range of machine speedtorque variations. Furthermore, a single carrier is used for PWM, instead of multiple carriers, which further reduces computational complexity. A detailed comparative study is carried out, to prove the performance difference between the low switching loss-based SV-PWM techniques, which is previously proposed by authors and the present proposed hybrid-PWM strategy. In addition, total harmonic distortion of voltage and current (%THD v,i ), duty-cycles of the switches, total inverter power loss as well as DC-link voltage balancing capabilities are also compared. The balancing ability of the proposed strategy by changing the neutral point potential control is also demonstrated. Detailed simulation and experimental studies are carried out to prove the performance of the proposed control strategy with a 6.0 kW, surface-mounted permanent magnet synchronous machine (SPMSM). Simulation and experimental test results prove the desired performance of the proposed scheme.

show abstract

“…2.) are usually used with traditional type of modulation techniques [18], [19]. There was also attempt to use CSC with NPC multilevel inverter [20], however, despite the fact that it discusses sensorless control strategy, simple sinusoidal PWM modulation is utilized, giving no sense on sensorless control.…”

Section: Literature Reviewmentioning

confidence: 99%

Verification of current sensorless control for single-phase NPC multilevel inverter

Suzdalenko

Zaķis

Steiks

et al. 2015

2015 9th International Conference on Compatibility and Power Electronics (CPE)

View full text Add to dashboard Cite

The current control is becoming a challenging task for switched mode power supplies, while current sensorless control solutions can avoid the instantaneous current measurements that has been applied for mostly used power factor correction topologies. However, multilevel type of converters haven't been considered to use with current sensorless control (CSC). Hereby, the CSC is applied to three level neutral point clamped converter, where special volt-second balance is applied to inductor in order to keep average inductor's current value to track the reference signal during both discontinuous and continuous current modes. The explanation of post-fitting and pre-fitting current trajectories is done that are necessary for proper transition between voltage levels. Experimental results have confirmed the theoretical model. Keywords-sensorless control; current control; pulse width modulation inverters978-1-4799-6301-0/15/$31.00 ©2015 IEEE

show abstract

Modulation techniques for three-phase three-level NPC inverters: A review and a novel solution for switching losses reduction and optimal neutral-point balancing in photovoltaic applications

Cited by 26 publications

References 6 publications

A PWM Strategy for the Minimisation of Losses in a 3-level T-type Voltage Source Inverter

A PWM Strategy for the Minimisation of Losses in a 3-level T-type Voltage Source Inverter

A Hybrid PWM-Based DC-Link Voltage Balancing Algorithm for a Three-Level NPC DC/AC Traction Inverter Drive

Verification of current sensorless control for single-phase NPC multilevel inverter

Contact Info

Product

Resources

About