non technical losses reduction
DESCRIPTION
Non Technical Losses ReductionTRANSCRIPT
VOLTA RIVER VOLTA RIVER AUTHORITYAUTHORITY
NON TECHNICAL LOSSES REDUCTIONNON TECHNICAL LOSSES REDUCTION
A PRESENTATION DURING UPDEA A PRESENTATION DURING UPDEA SCIENTIFIC COMMITTEE MEETING IN SCIENTIFIC COMMITTEE MEETING IN DURBAN, SADURBAN, SA
THOMPSON AGALABTHOMPSON AGALAB
NON TECHNICAL LOSSES REDUCTIONNON TECHNICAL LOSSES REDUCTION BACKGROUNDBACKGROUND
–A menace in most African utility operations. –Occur as a result of distribution operational problems.–Loss of huge sums of revenue to many utilities. –Efforts taken to reduce non-technical losses in
African Utilities have been varied, uncoordinated, unsustainable and hence ineffective.–Approached with well-strategize customer centred plans.
NON TECHNICAL LOSSES REDUCTIONNON TECHNICAL LOSSES REDUCTION –A menace in most African utility operations. –Occur as a result of distribution operational problems.–Loss of huge sums of revenue to many utilities. –Efforts taken to reduce non-technical losses in
African Utilities have been varied, uncoordinated, unsustainable and hence ineffective.–Approached with well-strategize customer centred plans.
This presentation will seek to This presentation will seek to address the following issuesaddress the following issues
• Definition and analysis of non-technical losses.
• International comparison of non-technical losses in the sub-region of West Africa.
• Identified causes of non-technical losses • Analysis of the causes of non-technical
losses• Measures to combat non-technical losses • Performance monitoring indicators.
DEFINITION AND ANALYSIS OF NON-DEFINITION AND ANALYSIS OF NON-
TECHNICAL LOSSESTECHNICAL LOSSES • Power system losses refer to the difference
between bulk energy purchased from the national grid and the total energy accounted for expressed as a percentage.
• The total energy accounted for comprises of billed energy, street lighting and temporary lighting and energy consumption in VRA/NED sub transmission premises.
• Power system losses can be divided into two categories: technical and non-technical .
• Technical losses are due to resistance and iron core losses which occur during the transmission and distribution of electric power.
• These are naturally occurring losses
• Consist mainly of power dissipation in transmission lines, power transformers, measurement systems, etc.
• Technical losses are possible to compute and control.
• Non-technical losses are due to human manipulation or errors and are therefore external to the power systems.
• Non-technical losses are very difficult to measure.
Background of NED LossesBackground of NED Losses
• The system losses in NED stood at 12% in 1990 and this increased steadily to 31% in 2003 and improved to 18.8% in 2008.
• NED losses started rising from 1996 when the government embarked upon National Electrification Project
• As a result long transmission lines and distribution networks were constructed over a short period given rise to sudden increase in both technical and non-technical losses.
• Very long distribution lines with very little load at the tail end.
• Existing networks are saddled with very old and undersized cables.
• Also in the process of having most rural areas connected in a short period, standards of cable and metering might have been compromised.
NED losses trend from 1990 to 2008NED losses trend from 1990 to 2008
12
18
13 13.71517.3
19.719.621.8
24.529 28.229.1
31.330.327
24.8
20.218.8
0
5
10
15
20
25
30
35
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
Losses
Experience of most utilities has shown that losses worsen Experience of most utilities has shown that losses worsen as mass electrification programme are embarked uponas mass electrification programme are embarked upon
Utility Period of mass electrification
losses
Eskom 1990 – 1996 40%
ECG 1999 - 2000 32%
NED 1999 - 2000 31%
Causes of Non-Technical LosesCauses of Non-Technical Loses
• Power theft; defined as a conscience attempt by a person to reduce or eliminate the amount of money he or she will owe the utility for electric energy.
• Illegal ConnectionPureAdministrative
• Self line Constructions
Causes of Non-Technical Loses( ctd)Causes of Non-Technical Loses( ctd)• Meter related problems
– Meter bypass/ tamper– Wrong readings– “U- TOUCH”– High meter position– Faulty meter – Meter ratings– Over aged meters – Incorrect C.T. multiplying factor – Meter Transfers
Causes of Non-Technical Loses (ctd)Causes of Non-Technical Loses (ctd)
• Billing Problems • Premises connected but a/cs not set up in
System.• Wrong classification• Under keying of meter reading• Customers with zero readings• Over clocked meter readings• Un metered/flat rate supplies
Under estimation Unpaid bills
Analysis of power theft in NEDAnalysis of power theft in NEDitem Jan Feb Mar Apr May Jun Jul Aug Sept Total
Premises visited
1000 1000 1000 1000 1000 1000 1000 1000 1000 9000
Illegal Connection
54 56 105 76 119 93 85 72 24 686
Meter bypass
1 1 2 3 9 7 13 4 40
Tampered Meters
15 6 6 3 4 16 3 11 3 74
% Power theft
6.9 6.4 11.2 8.2 12.6 11.8 10.3 9.6 3.1 8.9
Losses due to meter related -2007Losses due to meter related -2007
item Jan Feb Mar Apr May Jun Jul Aug
No.of meters
134,475
136,800 138,762
139,460
140,487
141,052
142,067
143,232
No. Faulty
5 13 11 7 21 7 17 18
Unsealed
53,898 54,720 55,504 55,784 56,194 56,194 56,826 57,292
% Losses
40 40 40 40 40 40 40 40
Measures to check illegal connectionsMeasures to check illegal connections
i. LORG-Loss Reduction Gang
• powers to check, remove, charge penalties and refer to Legal Department for the prosecutions of people caught for illegal connections.
ii. Monetary Award
• For each illegal connection reported and verified to be true.
iii. Zero consumption Report
• run every month for field check
iv. Consumption analysis Report
• A customer whose consumption is abnormal is flagged for further investigations.
v. Meter bypass penalty
• Penalty charge of Gh¢ 100 plus six months estimated consumption
vi. Meter tempering
• Penalty charge of Gh¢ 100 plus six months estimated consumption and full cost of meter.
Thank You