A novel implementation of digital control strategy for multilevel inverters using FPGA Wavect controller

Chinmayi,; Shivaleelavathi, B. G.

doi:10.1109/compel.2017.8013338

Cited by 5 publications

(4 citation statements)

References 4 publications

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“…The feasibility of the proposed control strategy demonstrated for both single-phase and three-phase CHBMLI. The simulation results are validated with experimental results [33]- [35]. The EMC PWM technique improves quality of the output power by increased DC bus utilization of 15% and also reducing the %THD at the output.…”

Section: Elliptical Multi Carrier Pwm Technique (Emc Pwm)mentioning

confidence: 90%

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Review on Multi Level Inverter Topologies and Control Strategies for Solar Power Conversion

Shivaleelavathi

Srikanth²,

Yatnalli

2020

emitter

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Nowadays solar power has become an alternate method of power generation for standalone systems for both urban and rural electrification. The Power Electronics converters used for the power conversion should provide quality AC output to have near sinusoidal voltage. The inverter topology and the PWM technique of the inverter play a vital role in providing quality output. This paper reviews recent contribution to establish the current status and development of the technology to provide reader with an insightful review of multilevel inverters and its control strategy. A brief overview of Multi Level Inverters (MLI) topology and advantages of Cascaded H-Bridge Multi Level Inverter (CHBMLI) for solar power conversion is presented and the various control strategies for CHBMLI are discussed with view point of quality output. Among the different PWM techniques discussed, the Elliptical Multi Carrier PWM (EMC PWM) control strategy is the new modulation technique which successfully improves the DC bus utilization without over-modulation and without adding third harmonic to fundamental frequency. Also, the technique is successful in reducing the %THD at the output voltage. The control strategy is simple even with increased level of output voltage, which is not possible in SVPWM technique. Hence, the EMC PWM technique is having better performance when compared to Multi Carrier PWM (MCPWM) technique, Space Vector PWM (SVPWM) technique and Third Harmonic Injection PWM (THIPWM) technique.

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Section: Elliptical Multi Carrier Pwm Technique (Emc Pwm)mentioning

confidence: 90%

“…This increase in the performance is achieved without "over-modulation" and without "third harmonic injection" to modulating wave. EMC PWM control startegy is less complex and can be extended to higher level of MLI [35 ] - [36].…”

Section: Summary Of Literature Reviewmentioning

confidence: 99%

Review on Multi Level Inverter Topologies and Control Strategies for Solar Power Conversion

Shivaleelavathi

Srikanth²,

Yatnalli

2020

emitter

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“…To achieve seven-level output in single-phase CHBMLI, the asymmetrical [20] sources of values V1 = 3/4 V dc and V2 = 1/4 V dc are used, where V dc = 325 V to achieve r.m.s output voltage of 230 V at the inverter of Figure 3 [21]. The switching sequence for switches to attain seven-level at the output of the inverter is given in Table 1 [22].…”

Section: Seven-level Chbmli With Rl-loadmentioning

confidence: 99%

Simulation of Seven and Nine Level CHBMLI with Elliptical Phase Disposition PWM Technique

Chinmayi¹,

Shivaleelavathi²,

Yatnalli³

2020

JPEE

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Electric vehicles are in demand in recent days due to depleting conventional energy resources. Electric vehicles which are environmental friendly are set to increase on road in coming days. The Electric vehicles which consist of electric drive systems are made up of electric motors, inverters and batteries. There is a need to increase their output quality while decreasing their size and cost. The multilevel inverter plays a vital role in improving the quality of the output voltage of the inverter. This paper presents the implementation of Elliptical Phase Disposition Pulse Width Modulation (EPD PWM) technique for higher level of Cascaded H-Bridge Multi Level Inverter (CHBMLI). The performance of 5, 7 and 9-level CHBMLI with proposed EPD PWM scheme is analyzed for three-phase RL-load. The simulation results prove that the voltage %THD reduces from 28.09 to 12.85 to 9.69 and current %THD reduces from 25.58 to 10.22 to 9.42 as the number of inverter output level increases from 5-7-9 level respectively. The simulation is carried out on MATLAB/ SIMULINK platform and the results were compared with conventional method to validate the proposed scheme. The simulation results prove that the novel EPD-PWM technique can be used to effectively control the CBHMLI.

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“…Output peak voltage is available for 8 ms as shown in Figure 4a compare to sine wave PDPWM technique wherein the peak output voltage is available for 6ms. The equations (3) to (6) shows the DC bus utilization in both cases [22]. This contributes to increased peak and rms value of the output voltage and current of CMLI in case of elliptical modulating wave.…”

Section: Modified Multicarrier Pwm Technique 21 Generation Of Elliptical Modulating Wave Using Xsgmentioning

confidence: 99%

Digital Control of Three-Phase Cascaded Multilevel Inverter Using FPGA Wavect Tool

Srikanth

Shivaleelavathi

2018

IJPEDS

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<span>The multi carrier modulation technique is the most employed PWM technique for cascaded multilevel inverter (CMLI) since this control strategy can be easily extended to higher number of levels of output compared to space vector PWM technique. This paper proposes a modified multi carrier PWM technique for three-phase CMLI. The proposed PWM technique has been implemented using MATLAB Xilinx System Generator, which automatically generate code from system model. The hardware implementation of the three-phase CMLI has been carried out to substantiate the working of proposed PWM technique. Novel FPGA Wavect digital controller is used to generate the PWM pulses, which is a real time simulator and controller. This digital controller improves the accuracy of the hardware implementation. Hardware implementation of proposed control strategy for three-phase CMLI with RL load proves that the proposed PWM technique results in improved power output quality with reduced harmonic components.</span>

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A novel implementation of digital control strategy for multilevel inverters using FPGA Wavect controller

Cited by 5 publications

References 4 publications

Review on Multi Level Inverter Topologies and Control Strategies for Solar Power Conversion

Review on Multi Level Inverter Topologies and Control Strategies for Solar Power Conversion

Simulation of Seven and Nine Level CHBMLI with Elliptical Phase Disposition PWM Technique

Digital Control of Three-Phase Cascaded Multilevel Inverter Using FPGA Wavect Tool

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