MONFILS Pierre-André (BE) Session 5 - Block 1 - Question 5.14 Barcelona 12-15 May 2003 One phase rural distribution installation with direct connection.

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Presentation transcript:

MONFILS Pierre-André (BE) Session 5 - Block 1 - Question 5.14 Barcelona May 2003 One phase rural distribution installation with direct connection to HV trunk line P.A. MONFILS, Jean-Louis LILIEN, A. OMBOUA

MONFILS Pierre-André (BE) Session 5 - Block 1 - Question 5.14 Barcelona May Scope of the project Local conditions Makola application Load Reliability aspects SUMMARY

MONFILS Pierre-André (BE) Session 5 - Block 1 - Question 5.14 Barcelona May Scope of the project The problemThe solution

MONFILS Pierre-André (BE) Session 5 - Block 1 - Question 5.14 Barcelona May Typical low load user (Makola)

MONFILS Pierre-André (BE) Session 5 - Block 1 - Question 5.14 Barcelona May One 500 people village: Estimated load (UNESCO) Typical low load user (Makola) Conclusion: 50 kVA is OK !

MONFILS Pierre-André (BE) Session 5 - Block 1 - Question 5.14 Barcelona May Local conditions

MONFILS Pierre-André (BE) Session 5 - Block 1 - Question 5.14 Barcelona May Local conditions 846 km from the main power supply Very low short-circuit level: 360 A Very low load: –Frequent over-voltages –Important power availability 50 kVA = SIL (Surge impedance loading) Very high keraunic level (lightning activity)

MONFILS Pierre-André (BE) Session 5 - Block 1 - Question 5.14 Barcelona May Local conditions High soil resistivity: > 3000 .m –HV earth resistance: 35  –Risks for the inhabitants in case of line-to-earth fault in case of lightning on the HV line –Needs deep analysis of earthing system

MONFILS Pierre-André (BE) Session 5 - Block 1 - Question 5.14 Barcelona May Schematic diagram Makola application

MONFILS Pierre-André (BE) Session 5 - Block 1 - Question 5.14 Barcelona May SF6 VT technology: high reliability Limited maintenance Limited weight: easy to transport/handle Limited cost (no switch bay) Direct from 245 kV to 230 V (50 kVA) Makola application

MONFILS Pierre-André (BE) Session 5 - Block 1 - Question 5.14 Barcelona May Makola application

MONFILS Pierre-André (BE) Session 5 - Block 1 - Question 5.14 Barcelona May Makola application

MONFILS Pierre-André (BE) Session 5 - Block 1 - Question 5.14 Barcelona May Makola application

MONFILS Pierre-André (BE) Session 5 - Block 1 - Question 5.14 Barcelona May Load recording

MONFILS Pierre-André (BE) Session 5 - Block 1 - Question 5.14 Barcelona May Load recording

MONFILS Pierre-André (BE) Session 5 - Block 1 - Question 5.14 Barcelona May Reliability aspects Improved technology (SF6 VT) with very limited maintenance Immediate protection by ZnO surge arrester One year experiment: the reliability of the equipment is much higher than the HV system (min 5 power outages per month) Possible improvement by use of HV fuses

MONFILS Pierre-André (BE) Session 5 - Block 1 - Question 5.14 Barcelona May Improvement of the quality of life of rural populations (< 3% of peoples access electrical power in Congo) Electrical energy gives access to drinking water, food preservation, lighting. Electrical energy may help starting development of local activities Our solution is cost effective, easy to handle and reliable Conclusions

MONFILS Pierre-André (BE) Session 5 - Block 1 - Question 5.14 Barcelona May 2003 Thank you for your attention !