PV BALANCERS: CONCEPT, ARCHITECTURES, AND REALIZATION Simulation Projects

ABSTRACT:

This paper now a new concept of module integrated converters called PV balancers for photovoltaic applications. The planned concept enables independent maximum power point tracking (MPPT) for each module, and effectively decreases the want for power converters. The power rating of a PV balancer is less than 20% of its counterparts, and the manufacturing cost is thus naturally reduced.

PV

In this paper, two architectures of PV balancers are proposed, analyzed, realized, and verified through simulation and experimental results. It is anticipated that the planned approach will be a low-cost solution for future photovoltaic power systems.

 

SOFTWARE: MATLAB/SIMULINK

BLOCK DIAGRAM:

Architecture I of PV balancers

(a) Architecture I of PV balancers

Architecture II of PV balancers

(b) Architecture II of PV balancers

Figure 1. Two possible architectures of PV balancers

EXPECTED SIMULATION RESULTS:

Output voltages of PV balancers in Architecture I

Figure 2. Output voltages of PV balancers in Architecture I

Output voltages of PV balancers in Architecture II

Figure 3. Output voltages of PV balancers in Architecture II

CONCLUSION:

A new concept of module-integrated converters called PV balancers has been planned and verified in this paper. The planned concept enables independent maximum power point tracking (MPPT) for each module, and effectively decreases the want for power converters.

POWER CONVERTER

PV balancers may have a significant economic value for photovoltaic systems in the future. Future work will be focused on power converter optimization, dc bus voltage control, and developing a highly efficient inverter for PV balancers.

REFERENCES:

  1. Kjaer, J. Pedersen and F. Blaabjerg, “A review of single-phase grid-connected inverters for photovoltaic modules,” IEEE Trans. Ind. App., vol. 41, no. 5, pp. 1292-1306, Sept. 2005.
  2. Linares, R. Erickson, S. MacAlpine, and M. Brandemuehl, “Improved energy capture in series string photovoltaic via smart distributed power electronics,” APEC’09, pp. 904-905, 2009.
  3. “Power circuit design for solar magic sm3320,” Application Note AN-2124, National Semiconductor, 2011.
  4. Trubitsyn, B. Pierquet, A. Hayman, G. Gamache, C. Sullivan, and D. Perreault, “High-efficiency inverter for photovoltaic applications,” ECCE’10, pp. 2803-2810, Sept. 2010.
  5. Pierquet, and D. Perreault, “A single-phase photovoltaic inverter topology with a series-connected power buffer,” ECCE’10, pp. 2811- 2818, Sept. 2010.

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