SYSTEMBALANCE
monitoring network is only possible with fibre optic network.
Substation Automation
Substation connects the power generated from solar farm to the utility grid for power transmission to the end consumer. Modern substation automation, which is based on IEC 61850, is designed to improve overall system reliability and significantly reduce the number of copper wires
used [3, 4].
Since equipment (e.g Switchgear, Transformer, Circuit breaker, etc) in substation operates at medium/high voltage application, it is necessary to have galvanic isolation to provide protection as well as to have communication lines that are immune to EM field. Therefore, fibre optic is the best solution for such requirements in the substation automation.
Avago has many parts that suit IEC 61850 implementation based on 10/100/1000Mbps Ethernet protocol. Figure 6 shows typical circuit diagram for Fast Ethernet Fibre Optic Transceiver. AFBR-5978Z’s input/output data signals (based on LVPECL) are easily connected to the common Ethernet PHY ICs available in the market.
About the Author
Alek Indra is the technical marketing engineer for Avago Technologies in Industrial Fibre Products Division. Alek has many years of experience in fibre-optic transceiver products and applications. Alek’s expertise is in fibre- optic transceiver design, product test and fibre-optic application design-in activities.
Figure 5. Substation Automation based on IEC 61850
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Figure 6. AFBR-5978Z Fast Ethernet Fibre Optic Transceiver Driving Circuitry
REFERENCES
[1] Armstrong, S.; Hurley, W.G. “Investigating the Effectiveness of Maximum Power Point Tracking for a Solar System.” IEEE, Power Electronics Specialists Conference, 2005.
[2] Piao, Z.G.; Park, J.M; Kim, J.H.; Cho, G.B.; Baek, H.L.; “A Study on the Tracking Photovoltaic System by Program Type.” Electrical Machines and Systems, 2005. ICEMS 2005. Proceedings of the Eighth International Conference on Vol 2, Pages: 971 – 973, Sept 2005
[3] L. Andersson, Ch. Brunner and F. Engler, “Substation Automation based on IEC 61850 with New Process Close Technologies”, IEEE Powertech Bologna, June 2003.
[4] Ch. Brunner, “IEC 61850 Process Connection – A Smart Solution to Connect the Primary Equipment to the Substation Automation System”, ABB Switzerland, Zurich, Switzerland.
www.solar-pv-management.com Issue III 2010
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