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TRANSCRIPT
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DC micro grids and distribution systems: An overview
GUIDED BY, PRESENTED BY, Mrs. Chithra S.R, Mr. Abhinandh B.G ASST.PROFESSOR E13U002 (DEPT. OF EEE) MESITAM
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INTRODUCTION
•War of Currents
N.Tesla Thomas Edison
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MOTIVATION FOR DC SYSTEMS RECONSIDERATION
•DC Loads•Renewable energy sources •Storage•Data Centers•Electric Vehicles •DC Micro grids
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DC MICROGRIDS
•Renewable energy sources and storage systems•Islanded mode of operation
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FEASIBILITY OF DC DISTRIBUTION SYSTEM
•Efficiency •Conversion Losses•Resistance of the circuit
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DESIGN OF DC DISTRIBUTION SYSTEMS
•Steady state modeling •Configurations of dc micro grid for data centers
(a) (b)
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PROTECTION OF DC DISTRIBUTION SYSTEMS
•3 phase ac circuit breakers in series
•Ultra fast hybrid dc circuit breakers
•Economic handshaking method
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DC MICROGRID STANDARDS
• The EMerge Alliance Data/Telecom
Center Standard-380V DC
•Military standard (MIL-STD-1399)
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EXISTING DC DISTRIBUTION SYSTEMS
•Space Craft systems NASA international space station
•Data centers Prineville Data Center, Oregon•Telecommunications Nippon Telegraph and Telephone ,Japan •Ship Board Power Systems
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ADVANTAGES OF DC DISTRIBUTION SYSTEMS
•No Inductance ,Capacitance and surge •No Skin Effect •Reduced Interference with communications •No stability problem and synchronising difficulties •Only Two Conductors are required
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CONCLUSION
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REFERENCES
[1] DC micro grids and distribution systems: An overview Ahmed T.Elsayed, Ahmed A. Mohamed, Osama A. Mohammed Year: 2013Pages: 1 - 5.[2] S.-H. Ryu, J.-H. Ahn, B.-K. Lee, K.-S. Cho, Single-switch ZVZCS quasi-resonant CLL isolated DC–DC converter for low-power 32 LCD TV, in: IEEE Energy Conversion Congress and Exhibition (ECCE), 2013, pp. 4887–4893.[3] C.-H. Tsai, Y.-W. Bai, M.-B. Lin, R.J.R. Jhang, C.-Y. Chung, Reduce the stand by power consumption of a microwave oven, IEEE Trans. Consum. Electron. 59(2013) 54–61.[4] D. Salomonsson, A. Sannino, Load modeling for steady-state and transient analysis of low-voltage DC systems, IET Electr. Power Appl. 1 (2007) 690–696.[5] M. Amin, Y. Arafat, S. Lundberg, S. Mangold, Low voltage DC distribution system compared with 230 V AC, in: IEEE Electrical Power and Energy Conference(EPEC), 2011, pp. 340–345.
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THANK YOU “I'd put my money on the sun and solar energy. What a source of power! I hope we don't have to wait until oil and coal run out before we tackle that.”
- Edison