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Customer Oriented Reliability. Traditional Reliability Indexes Measure System Averages. CAIDI Measures Duration SAIFI Measures Outage Frequency SAIDI Measures Accumulated Time Off MAIFI Measures Momentary Interruptions. M L G W’s 2003 Reliability Performance. SAIFI 1.41 events - PowerPoint PPT Presentation
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Customer Oriented Reliability
Traditional Reliability Indexes Measure System Averages
CAIDI Measures Duration
SAIFI Measures Outage Frequency
SAIDI Measures Accumulated Time Off
MAIFI Measures Momentary Interruptions
M L G W’s 2003 Reliability Performance
SAIFI 1.41 events
CAIDI 169 minutes
SAIDI 238 minutes
Customer Average Interruption Duration Index
0.9
1
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003
5 YEAR WEIGHTED MOVING AVERAGES IN REDThrough First Quarter 2003
SYSTEM AVERAGE INTERRUPTION FREQUENCY
1.2
1.4
1.6
1.8
2.0
2.2
2.4
2.6
2.8
1985 1987 1989 1991 1993 1995 1997 1999 2001 2003
5 YEAR MOVING AVERAGES (WEIGHTED)
CUSTOMERS
EXPERIENCING
MULTIPLE
INTERRUPTIONS
0.00
20.00
40.00
60.00
80.00
100.00
%
of
C
U
S
T
O
M
E
R
S
1+ 2+ 3+ 4+ 5+ 6+N u m b e r of I n t e r r u p t i o n s
344,529
242,138
153,480
85,674
46,039
25,111
C. E. M. I. 2002
What Reliability Do Customers Demand ??
“Your most unhappy customers are your greatest source of learning.”
-Bill Gates
Analyzed Three Years of Customer Reliability Complaints
• Over 600 Complaints about Outage Frequency
• Over 250 Complaints about
Outage Duration
0
20
40
60
80
100
120# O
F C
OM
PL
AIN
TS
PE
R 1
0,0
00 C
US
TO
ME
RS
Customer Complaint CatalystsOutage Duration
Less than4 hours
4 to 6hours
6 to 10hours
Over 10hours
0
5
10
15
20
25
30
35
40# o
f C
om
pla
ints
per
10,0
00 C
usto
mers
1 Month6 Months Interruptions During 12 Months
222 33
3
4+
6+
4+
4
5
Customer Complaint CatalystsOutage Frequency
Customer Oriented Reliability
Prevent Customers from Experiencing Over 3 Interruptions Per Year
Prevent Outage Events Over 10 Hours in Duration
Strategic
Targeting of
Assets for
Reliability
Reliability Strategies
• Effective line clearance (Hybrid 3-4-5 Cycle)
• Reduction in recurring events
• Strategically address root causes
• Target long-duration outages
Tree Trimming
• Analyzed cycle and emergency trimming
• Hybrid 3-4-5 Plan
Unfused Taps
• Isolate Interruptions to Small Numbers of Customers on Laterals by Installing Line Fuses
Retrofitting Underground Cable
• Continue aggressive cable replacement for PE cable
• Replace PILC get-away cable that has reached end-of-life
Reclosers & Sectionalizers
35 new reclosers
• Reduce number of customers interrupted
• Save wear and tear on station breaker
• Protect cable getaway• Speeds troubleshooting
Under grounding circuits
Reduce exposure to trees, vehicles, & lightning by under grounding high-risk segments of circuits.
Reliability Goals YTD February, 2004
Customers with more than 3 outages: 69
Customers with 10+ hours outages: 22
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