Name / Miroslav Nimrihter / Session / Alpha Session 5
Company / Univesity of Novi Sad / Block / 5.1.
Address / Fruskogorska 11, Novi Sad / Question n° / 5.8.
Yugoslavia / Language used on the floor / English
Phone / 381 21/350 122 ext.543 / Accompanying visuals on file ? / Yes
e-mail /
OVERHEAD LINES IMPORTANCE-DECISION MAKING BASIS FOR REVITALIZATION NESESSITY
METHODOLOGY FOR SELECTION OF OHL CANDIDATES FOR REVITALIZATION
The most important issue is adequate allocation of money to those OHLs:
- that are in the emergency for revitalization activities and
- that have the greatest impact on distribution system reliability.
Figure 1 - Simplified block diagram of methodology of OHL selection for revitalization
RELIABILITY OF LINES WHICH ARE CANDIDATES FOR REVITALIZATION
Among more lines which have equally bad state, the first to be revitalized is the one with the greatest importance for consumers and power distribution company. It makes possible a justification of investments in reliability improvement of elements by means of OHL revitalization.
Figure 2. The path of crew during separating the failured section of the feeder by the halving method
ILLUSTRATION OF METHOD APPLICATION IN THE PART OF REAL NETWORK
Figure 2 - Configuration of analyzed line
ENS=14 007 kWh
CIC=16 776 $/year
If the revitalised line have some kinds of distribution automation that can be considered by the separate reliability estimation computer programe, developed on the University of Novi Sad.
CONCLUSION
The advantages of the proposed methodology are:
- All OHLs are analyzed in the same way. Their availability levels are numerically determined, enabling comparation of OHLs.
- As the result of applying of the proposed revitalization methodology, one can get the modern OHL, capable for operation in the next 40 years. The OHLs so revitalized have increased reliability and nominal current. The capital expenditures are only 40-60% of those for new OHLs but the operating costs and costs of energy losses are significantly reduced.