Presentation on

ELECTRICITY DISTRIBUTION LOSSES

& ITS PREVENTION

Presented By:- Abhishek Kumar, Geo Spatial Division, HCL 1

CONTENTS

1. Drivers of AT&C LOSSES

2. GIS MAP SAMPLE HAMIRPUR

3. AT&C Calculation of DISTRIBUTION TRANSFORMER

4. Pre-requisites for obtaining baseline AT&C LOSSES

5. Ring Fencing Diagram

2

Drivers for AT&C Losses

TECHNICAL LOSSES COMMERCIAL LOSSES

Overloading of system elements like

Feeders, Transformers & Conductors

Absence of up gradation of Old Lines

and Equipment's

Non Installation of Capacitors

Low Metering/Billing/Collection Efficiency

Theft, Pilferage and tampering of meters

Inadequate Revenue Collection

Faulty Meter Reading

GIS MAP SMAPLE (HAMIRPUR)

4

33/11 KV

SUBSTATION

REPRESENTATION OF SUSPECETED THEFT CASES

5

BILL NOT SHOWN/DOOR LOCK

NO CONNECTIONS

VALID CONNECTIONS

AT&C LOSS CALCULATION AT DTR LEVEL

6

DTR, 25KVA

DTR

DT INPUT ENERGY: 3020 KWH

BILLED UNIT: 3020

TOTAL ASSESMENT: 15793.77

REALISATION: 11843 INR

AT&C LOSS : 28.79%

DTR, 25 KVA

(13 CONSUMERS

CONNECTED)

DT INPUT ENERGY: 3020 KWH

BILLED UNIT : 2868 KWH

ASSESMENT: 15793.77 INR

REALISATION : 11843 INR

AT&C LOSS : 28.71%

CALCULATION of AT&C LOSS : BILLING EFFICIENCY

7

Billing Efficiency= (Billed Unit/DT Energy) x 100 = 2868/3020 x 100 = 94.96 %

SI No.DT INPUT

ENERGY (KWH)ACCOUNT ID

METER STATUS

BILL_BASIS CONSUMPTION

1 6368004000 FAULTY ASSESMENT (METER DEFECTIVE) 80

2 4485004000 ACTIVE METERED UNIT 400

3 7884004000 ACTIVE METERED UNIT 740

4 3872893000 FAULTY ASSESMENT (METER DEFECTIVE) 160

5 4414004000 FAULTY ASSESMENT (METER DEFECTIVE) 160

6 6492993000 ACTIVE METERED UNIT 291

7 872893000 ACTIVE METERED UNIT 160

8 7712004000 FAULTY ASSESMENT (METER DEFECTIVE) 245

9 2046993000 FAULTY ASSESMENT (METER DEFECTIVE) 80

10 942893000 FAULTY ASSESMENT (METER DEFECTIVE) 160

11 5797004000 ACTIVE METERED UNIT 157

12 2125993000 ACTIVE PROVISIONAL (HOUSE LOCKED) 104

13 5715893000 ACTIVE METERED UNIT 131

Total 2868

3020

CALCULATION of AT&C LOSS : COLLECTION EFFICIENCY

SI No. ACCOUNT ID CURRENT_ASSESSMENT LAST_PAY_AMT LAST_PAY_DATE

1 6368004000 239.06 239 25-Aug-14

2 4485004000 2156.8 2157 25-Aug-14

3 7884004000 4042.76 4043 26-Aug-14

4 3872893000 862.4 0 26-Jul-14

5 4414004000 1421.71 0 30-Mar-85

6 6492993000 1540.7 1541 25-Aug-14

7 872893000 867 0 12-Apr-14

8 7712004000 1161.98 1161 26-Aug-14

9 2046993000 218.95 219 19-Aug-14

10 942893000 853.59 854 19-Aug-14

11 5797004000 828.37 829 25-Aug-14

12 2125993000 1221.36 0 1-Jan-11

13 5715893000 379.09 800 20-Aug-14

TOTAL 15793.77 11843

8

Collection Efficiency: (Collected Payment/Billed Amount) x 100

= 11843/15793.77 x 100= 74.98%

CONCEPT OF AT&C LOSS

COMMERCIAL LOSSES

Factors causing Commercial Losses:

Meter tampering

Bypassing of meters

Usage of MAGNETS to slow down the meters

Tampering of PT circuits

CT/PT ratios (In case of HT meters)

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CONCEPT OF AT&C LOSS

COMMERCIAL LOSSES :- COLLECTION EFFICIENCY

Utility is not being able to collect the complete amount billed byit.

Absence of Energy Accounting & Auditing

In case of unavailability of arrear figures, the collection efficiencyfigures can be more than 100%.

Revenue collected shall exclude the arrears.

In above cases efficiency needs to be restricted to 100% and shallbe used for computation of AT&C losses.

10

PRE-REQUISITES FOR OBTAINING BASELINE AT&C LOSSES

Metering of Energy Input Points of Project Area

On incoming lines of 33/11 kV sub-stations located within project area.

On 33 KV, 11 KV feeders emanating from sub-station located outside project

area but supplying power to HT/LT consumers located within project area.

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PRE-REQUISITES FOR OBTAINING BASELINE AT&C LOSSES

Ring-fencing of Project area Electrical Network

Import/Export meters at the boundary of those lines that are feeding outside as well as inside project area so that import and export of energy can be measured for project area. These lines may emanate from the sub-stations located within or outside project area.

Import/Export meters on the dedicated feeder emanating from sub-stations located within project area but feeding outside project area.

Import/Export meters on 33/11 KV Sub-Stations

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RING FENCING DIAGRAM

13

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