Volume -I , Issue -VII, October 2014

ADVANCED FUZZY LOGIC CONTROL BASED DUAL-BUCK HALF-BRIDGE VOLTAGE BALANCER

S. V. V. S. K. Reddy , Y. Srinivavasa Rao

The increasing demand for development of power from renewable energy has lead to creation of Micro-dc grid.In Micro-dc grid two wire transmission is widely acceptable but from the consideration of different voltage levels of power converters and loads this is unacceptable .In order to meet this a half bridge dual buck voltage balancer can be incorporated into micro dc-grid. This has the functionality to convert a two wire into three wire system via a neutral line. However peak shoot through problem in bridge converter will degrade the performance of voltage balancer .In this paper, a dual-buck voltage balancer and control strategy based on fuzzy logic control technique is proposed which can avoid peak shoot through problem. The controller design is presented and control parameters are evaluated based on inductor current, capacitors and unbalanced loads.Fuzzy logic controller is designed.Finally,the simulation results of proposed fuzzy control scheme are compared with the normal proportional control scheme.

Dual-Buck,distributon system, half-bridge,micro-dc grid,voltage balancer,fuzzy logic control,two wire ,three wire system.

1. 1.H. Kakigano, Y. Miura, T. Ise, and R. Uchida, “DC voltage control of thedc micro-grid for super high quality distribution,” in Proc. IEEE PowerElectron. Spec. Conf., Jeju, Korea, 2006, pp. 518–525.
2. 2.H. Kakigano, Y. Miura, T. Ise, and R. Uchida, “DC micro-grid for super high quality distribution—System configuration and control of distributed generations and energy storage devices,” in Proc. Power Electron. Spec. Conf., 2006, pp. 1–7.
   infidelity in marriage how to cheat wives that cheat
3. 9.C. K. Tse and K. M. Adams, “Quasi linear modeling and control of DC/DC converters,” IEEE Trans. Power Electron., vol. 7, no. 3, pp.
4. 7.T. Tanaka, T. Sekiya, Y. Baba, M. Okamoto, and E. Hiraki, “Anew half-bridge based inverter with the reduced-capacity dc capacitorsfor dc micro-grid,” in Proc. Energy Convers. Congr.Expo., 2010,pp. 2564–2566.
5. 4.H. Kakigano, Y. Miura, and T. Ise, “Low-voltage bipolar-type dc microgridfor super high quality distribution,” IEEE Trans. Power Electron.,vol. 25, no. 12, pp. 3066–3075, Dec. 2010.
6. 3.M. Brenna, E. Tironi, and G. Ubezio, “Proposal of a local dc distribution network with distributed energy resources,” in Proc. 11th Int. Conf.Harmon. Quality Power, 2004, pp. 397–402
7. 5.J. Lago, J. Moia, and M. L. Heldwein, “Evaluation of power converters to implement bipolar dc active distribution networks—DC–DC converters, “in Proc. Energy Convers. Congr.Expo., 2011, pp. 985–990.
8. 8.H. Kanchev, D. Lu, F. Colas, V. Lazarov, and B. Francois, “Energy management and operational planning of a micro grid with a PV-based.
9. 10.P. R. K. Chetty. “Modeling and Analysis of Cuk Converter Using Current Injected Equivalent Circuit Approach, ” IEEE Trans. Ind. Electron., I E - 3 0 , 1, pp. 56-59, (Feb. 1983). [3] G. C. D. Sousa and B. K. Bose, “A fuzzy set theory based control of a phase-controlled converter DC machine drive,” IEEE Trans. Znd. Applicat., vol. 30, no. 1, pp. 3444, 1994
10. 6.H. Kakigano, A. Nishino, and .Ise, Distribution voltage control for dc micro grid with fuzzy control and gain-scheduling control, ”in Proc. Int. Conf. Power Electron., 2011, pp. 256–263.