A Non-Inverting High Gain DC-DC Converter with Continuous Input Current Wind Energy Projects

ABSTRACT:

High gain DC-DC converters are increasingly being used in solar PV and other renewable generation systems. Satisfactory steady-state and dynamic performance, along with higher efficiency, is a pre-requirement for selecting the converter for these applications. In this paper, a non-inverting high gain DC-DC boost converter has been proposed. The proposed converter has only one switch with continuous input current and reduced voltage stress across switching devices. The operating range of the duty cycle is wider, and it obtains a higher gain at a lower value of the duty cycle. Moreover, the converter has higher efficiency at a lower duty cycle while drawing a continuous input current. The continuous input current is a desirable feature of the dc-dc converter making it suitable for solar photovoltaic applications. The converter’s operation has been discussed in detail and extended to include the real circuit parameters for a practical performance evaluation. The proposed converter has been compared with other similar recently proposed converters on various performance parameters. The loss analysis for the proposed converter has also been carried out. Finally, the simulation has been validated with results from the experimental prototype.

KEYWORDS:

  1. Continuous conduction mode
  2. Duty cycle
  3. High gain
  4. DC-DC boost converter
  5. Voltage stress

SOFTWARE: MATLAB/SIMULINK

SCHEMATIC DIAGRAM:

Figure 1. (A) Conventional Quadratic Boost Converter (Cqbc) (B) Proposed Converter In [26] (C) Proposed Converter.

EXPECTED SIMULATION RESULTS:

Figure 2. Simulated Waveforms Of Il1 And Il2 And Vgs1 At D D 0.3.

Figure 3. Simulated Waveforms Of V0 And Vin At D D 0.3 With Vgs1.

Figure 4. Simulated Waveforms Of Input Current Iin At D D 0.3.

Figure 5. Simulated Waveforms Of Vc1, Vc3 And Vc4 At D D 0.3.

Figure 6. Simulated Waveforms Of Vd5, Vs1 And Vgs1 At D D 0.3.

CONCLUSION:

A new non-inverting DC-DC boost converter is proposed in this paper. The proposed converter has high gain and utilizes only one switch to operate the converter, and therefore, control is easy. The voltage stress on the switch and diodes is low, and therefore low voltage-rated switch can be chosen which increases the efficiency and reduces the cost. The converter has draws continuous input current and thus the need for an input filter does not arise. Hence, it can be used in microgrid applications as the voltage of the converter at a low duty ratio is high compared to the conventional boost converter and other high gain converters. To verify the analysis practically, a 200W hardware prototype has been prepared for the converter. The peak of the efficiency of the proposed converter is observed to be greater than 95% but the efficiency decreases at high output power on account of losses. Thus, the proposed converter is suitable for medium power range suitably up to 300W. The merits of the converter make it suitable to be used in solar PV applications, automobiles, fuel cells and electric vehicles.

REFERENCES:

[1] D. Habumugisha, S. Chowdhury, and S. P. Chowdhury, “A DC_DC interleaved forward converter to step-up DC voltage for DC microgrid applications,” in Proc. IEEE Power Energy Soc. Gen. Meeting, Vancouver, BC, Canada, Jul. 2013, pp. 1_5, doi: 10.1109/PESMG.2013.6672501.

[2] P. K. Maroti, M. S. B. Ranjana, and D. K. Prabhakar, “A novel high gain switched inductor multilevel buck-boost DC_DC converter for solar applications,” in Proc. IEEE 2nd Int. Conf. Electr. Energy Syst. (ICEES), Chennai, India, Jan. 2014, pp. 152_156, doi: 10.1109/ICEES.2014. 6924159.

[3] A. Sarikhani, B. Allahverdinejad, and M. Hamzeh, “A nonisolated buckboost DC_DC converter with continuous input current for photovoltaic applications,” IEEE J. Emerg. Sel. Topics Power Electron., vol. 9, no. 1, pp. 804_811, Feb. 2021, doi: 10.1109/JESTPE.2020.2985844.

[4] F. L. Tofoli, D. D. C. Pereira, W. J. de Paula, and D. D. S. Oliveira, Jr., “Survey on non-isolated high-voltage step-up DC_DC topologies based on the boost converter,” IET Power Electron., vol. 8, no. 10, pp. 2044_2057, Oct. 2015, doi: 10.1049/iet-pel.2014.0605.

[5] S.-Y. Tseng and C.-Y. Hsu, “Interleaved step-up converter with a singlecapacitor snubber for PV energy conversion applications,” Int. J. Electr. Power Energy Syst., vol. 53, pp. 909_922, Dec. 2013.

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