Simulation of a Single-Phase Five-Level Cascaded H Bridge Inverter with Multicarrier SPWM B-Spline Based Modulation Techniques

ABSTRACT

Multilevel Power Inverters are now often used to convert DC to AC voltage waveform. This kind of converter allows high power quality with low output harmonics and lower commutation losses with respect to the traditional ones in order to optimize this aspect. This paper presents a novel simulation analysis of the Multicarrier Sinusoidal Pulse Width Modulation (MC SPWM) techniques B-Spline functions based to control the switches of five-level single-phase cascaded H bridge inverter. In order to verify the performance of the converter, the harmonic content of the voltage due to modulation techniques has been taken into account. Results highlight the comparison between different B-Spline functions.

KEYWORDS

1.      Multilevel power converter

2.      Multicarrier modulation techniques

3.      B-spline functions

SOFTWARE: MATLAB/SIMULINK

 CIRCUIT DIAGRAM

Fig. 1: CHBMI single-phase with 2n+ 1 level

 EXPECTED SIMULATION RESULTS

Fig. 2: Comparison of THD% versus reference voltage trend for

Phase Disposition PD carriers: B2(t), B3(t) and B4(t).

Fig. 3: Comparison THD% versus reference voltage trend for

Phase Opposition Disposition POD carriers: B2(t), B3(t) and B4(t).

Fig. 4: Comparison THD% versus reference voltage trend for

Alternative Phase Opposition Disposition APOD carriers: B2(t),

B3(t) and B4(t).

Fig. 5: Comparison THD% versus reference voltage trend for

Phase Shifted PS carriers: B2(t), B3(t) and B4

Fig. 6: Comparison Fundamental Amplitude versus reference

voltage trend for Phase Disposition PD carriers: B2(t), B3(t) and

B4(t).

Fig. 7: Comparison Fundamental Amplitude versus reference

voltage trend for Phase Opposition Disposition POD carriers:

B2(t), B3(t) and B4(t).

Fig. 8: Comparison Fundamental Amplitude versus reference

voltage trend for Alternative Phase Opposition Disposition APOD

carriers: B2(t), B3(t) and B4(t).

Fig. 9: Comparison Fundamental Amplitude versus reference

voltage trend for Phase Shifted PS carriers: B2(t), B3(t) and B4(t).

 CONCLUSION

This paper presents a simulation analysis of the Multicarrier Sinusoidal Pulse Width Modulation techniques B-Spline functions based for five-level single-phase cascaded H-bridge inverter. The multi carrier modulation techniques taken into account are PD, POD, APOD and PS using PB2(t), PB3(t) and PB4(t) as carrier signals. In order to verify the performance of converter and harmonic content of the voltage, the used tool for comparison of different modulation techniques is THD%. The computed THD% values versus reference voltage (peak value) for the phase voltage have been presented and the related results have been compared among different carrier signals used. The minimum value of the THD% has  been obtained by using the PS modulation techniques with PB4(t) as carrier signal.

REFERENCES

[1] A. Takahashi I. Nabe and H. Akagi, A new neutral-point clamped PWM inverter, IEEE Trans. Ind. Appl., 17, 518" 1981.

[2] .T. Rodriguez, .T.-S. Lai, and F. Z. Peng, Multilevel inverters: a survey of topologies, controls, and applications, Industrial Electronics, IEEE Transactions on, vol. 49, no. 4, pp. 724- 738, Aug. 2002.

[3] M. Caruso et al., Design and experimental characteriz.ation of a low-cost, real-time, wireless AC monitoring system based on ATmega 328P-PU microcontroller, 2015 AEIT International Annual Conference (AEIT), Naples, 2015, pp. 1- 6. doi: 1O.1109!AEIT.2015.7415267

[4] M. Caruso, V. Cecconi, A. O. Di Tommaso, and R. Rocha. A Rotor Flux and Speed Observer for Sensorless Single-Phase Induction Motor Applications. International Journal of Rotating Machinery, vol. 2012, no. 276906, p. 13,2012.

[5] M. Caruso, A. O. Di Tommaso, F. Genduso, R. Miceli and G. R. Galluzzo, A DSP-Based Resolver-To-Digital Converter for High-Peiformance Electrical Drive Applications, in IEEE Transactions on Industrial Electronics, vol. 63, no. 7, pp. 4042-4051, July 2016.