WBSEB Metering,Billing

8/10/2019 WBSEB Metering,Billing

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Energy Bi ll ing

Revenue Collection

Energy Audit

Meter Reading

Welcome To

Seminar

On

EDP CellWBSEB


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Earlier Practice

METER RE DING

EDP CellWBSEB

Earlier Practice Problem Observed End Result ?IDENTIFICATION OF

CONSUMERS AS PER

SERVICE CONNECTION

NUMBER.

NO SCIENTIFIC ROUTE

PLAN FOLLOWED.

MANUAL RECORDING OF

READING BY METER

READER IN HIS OWNREGISTER.

?RECORDING METER

READING IN STAGES LEADS

TO ERROR AND EXTRA TIME

CONSUMPTION.

SKIPPING OF CONSUMERS

DUE TO ABSENCE OF ROUTE

PLAN/ IGNORANCE

EXCESS REQUIREMENT OF

MAN-POWER. DEPENDENCY ON

SUPERVISORY EXCELLENCE.

UNECONOMIC AND

INEFFICIENT SYSTEM.

INACCURATE ENERGY

DEMAND.


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EDP CellWBSEB

Existing System

EXISTING PRACTICE ADVANTAGE OVER EARLIER

SYSTEM RECORDING OF READINGS

DIRECTLY IN BLUE CARDS. INTRODUCTION OF METER

READING INSTRUMENT (M.R.I.).

INTRODUCTION OF REMOTE METER

READING.

MINIMIZE HUMAN ERROR.

NO SKIPPING OF CONSUMER. REGULAR ANALYSIS OF TAMPER

INFORMATION.

EASY MONITORING AND LOCATING

A CONSUMER.

SCIENTIFIC UTILISATION OF

MANPOWER.

METER RE DING


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ENERGY BILLING

EDP CellWBSEB

Earlier Manual Billing

Earlier practice End Result

Existing

Computerised

Billing

TRANSCRIPTION ERROR.

IRREGULARITY OF BILL

PREPARATION.

COMPUTATIONAL ERROR

IN BILL PREPARATION

ILLEGIBILITY OF BILLS.

DROPOUT OF BILLS

INTENTIONALLY OR BY

IGNORANCE.

HIGHER COST TOWARDS

PREPARATION OF BILLS.

LOSS OF REVENUE.

CONSUMER

DISSATISFACTION AND

LITIGATION.

EXCESSIVE BURDEN ON

EMPLOYEES.

INCREASE IN

EMPLOYEE

CONSUMER RATION.

No Loss of Revenue.

Lower Cost For Bill

Preparation.

Easy Generation Of

Reports.


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EDP CellWBSEB

C-I MANUALCONTINUED FOR 4 DECADES.

C-II ELECTRO-MECHANICAL SEMI AUTOMATED ECR SYSTEM

STARTED FROM 90S. COST PER COUNTER WAS RS. 56,000.

C-III COMPUTERISED CASH COLLECTION STARTED FROM

98:-ONLINE(SUPPLY AND DCC CO-LOCATED) : 13 SITES

PC BASED : 23 SITES

COST/COUNTER : RS. 75,000(AVG)

C-IV CUSTOMIZATION OF CASH COLLECTION

SYSTEM(RESTRICTED TO DCC) 3 GR. E/S UNDER BDN-IUPGRADED AND RUNNING : TOTAL COST : RS. 8 LACS.

C-V CUSTOMIZATION OF CASH COLLECTION SYSTEM AS

PART OF MODERNIZATION OF IMPORTANT SUPPLY STATIONS

(COVERAGE : 73 GR. E/S).

REVENUE COLLECTION

Evolution of Cash Management System


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EDP CellWBSEB

REVENUE COLLECTION

Manual System Electronic Cash Register Defects pri or to

Computerisation

ENTIRE CASH

COLLECTION

SYSTEM WASMANUAL FOR LONG

THREE DECADES UP

TO 1990 THROUGH

HAND WRITTEN

CASH RECEIPT.

DRAWBACKS: PRONE TO HUMAN

ERROR.

SLOW SYSTEM.

CONSUMERSATISFACTION

NOT UPTO

DESIRED LEVEL. HIGH COST OF

COLLECTION PER

CONSUMER.

A STEP TOWARDS

AUTOMATED CASH

COLLECTION SYSTEM.

MADE OPERATIONAL AT

DIFFERENT COUNTERS

OF E/SS

DAYS PAYMENT

RECORD TRANSFERRED

THROUGH FLOPPY FOR

SUBSEQUENT UPDATION

AT THE BILL

GENERATING STATION. A HARD COPY OF DAYS

SUMMARY LIST ALSO

AVAILABLE FORRECORD.

IN CASE OF FLOPPY

CORRUPTION, OFF - LINE

ENTRY IS DONE FROM

DAYS SUMMARY LIST.

DISADVANTAGE: NON-AVAILABILITY OF

BILL AND PAYMENT

STATUS

COLLECTION WITHOUT

VALIDATION CHECKING.

ERROR-PRONE

SYSTEM.

INEFFICIENTUTILIZATION OF

MANPOWER AND

MAN-HOUR.

NO FEASIBILE

MECHANISM TO

MONITOR:

a) 100 % READING AND

BILLING.

b) CONSUMPTION

PATTERN.c) QUALITY OF

METERS

d) DEFAULTING

CONSUMERS

e) TABLE-READING

PRACTICE

f) AVERAGE UNIT

BILLING

g) NEGATIVE

ADJUSTMENT OF

UNIT.

h) REVENUECOLLECTION

ALL THESE LED TO

CONSUMER

DISSATISFACTION AS

WELL AS POOR

REVENUE

MANAGEMENT


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Cash Register Computer Center

Floppy

Floppy Disk Attachment

Cash RegisterComputer Center

Day Summary List

EDP CellWBSEB

REVENUE COLLECTION


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OnlineCash Center

HUB

Computer Center

EDP CellWBSEB

REVENUE COLLECTION


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Computer Center

ES Cash Center

Cash

Counter1Cash

Counter2

Cash

Counter3

Modem TelephoneServer

Modem Telephone

P

C

BA

S

E

D

EDP CellWBSEB

REVENUE COLLECTION


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omputerised ash ollection

Only valid consumers paymentsare received.

No scope of doublepayment,payment against no bill.

Dues Status available to cashiers.

Easier and faster payment posting.

EDP CellWBSEB

REVENUE COLLECTION


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C-IV System Of Cash Collection

One Central Server at DCC stores all data for validation.

GR. E/S are connected through ISDN/Leased Line.

Cash Counter PCs act as remote clients of DCC Server.

Consumers can pay their energy bills in any E/S under the

DCC.

Payments are updated Online

EDP CellWBSEB

REVENUE COLLECTION



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Schematic Diagram Of Modernisation Scheme

EDP CellWBSEB

REVENUE COLLECTION


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All the Supply Stations will haveadequate

infrastructure toENTER/EDIT METER READING

COLLECT REVENUE

ANSWER CONSUMERS BILL RELATED

QUERIES

RUN AMS PACKAGE ETC.

Modernisation Of Important E S

EDP CellWBSEB

REVENUE COLLECTION


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enefit of the System

Better Consumer satisfaction.

Transparent & Efficienct System in Application

Monitoring.

Economical Operation.

Reduction in day to day operational difficulties.

EDP CellWBSEB

REVENUE COLLECTION



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Projects under Implementation

Power Network GIS with the help of GPS Instrument.The work is in progress.

Spot Billing for Low & Medium Voltage Consumers.

WBSEB is going to implement spot billing for Low & MediumVoltage consumers with the help of Hand Held Computer.

EDP CellWBSEB


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Preparation Of Feeder LossThrough Energy Audit

ENERGY UDIT

EDP CellWBSEB


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Overall T&D loss arrived for WBSEB as a whole are based on : Power available on Bus at Power stations recorded through low

accuracy electromechanical meters.

Power Flow recorded at different import and export points through

electromechanical meters.

Unit consumption of medium and low voltage consumers are

assessed mostly. No Composite Metering System at Feeder Levels Of EHV and HV Sub-Stations

T&D Loss figures shown much less than actual.

No scope to identify or quantify the losses at different stages of Voltage Levels and

Segments.

Wrong assessment towards fixing yearly revenue target for the supply stations.

No scope for documentation of system parameters.

Proper attention not given for reduction of losses as same was considered as reasonable.

Energy Audit

WBSEB EMC

`Problems before I ntroduction of Current Process


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Impact in terms of Operational and Financial Magni tude

Energy Audit

WBSEB EMC

Operational Financial

Proper energy management Better Revenue Management

Load forecasting, System Improvement Least interruption of Power Supply

Quality Power Supply Reduction in T&D losses.

Prioritizing the feeders towards load

shedding in the event of power shortfall

and/or any system constraints

Fixing of rational annual revenue target

for Electric Supply Stations.

Improved maintenance practices. Efficient Consumer Service


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Practice & Processes

The overall objective is to put in place an effective

metering system to identify aggregate technical &

commercial losses

To make a MIS for proper planning of load managementand load forecasting

To introduce accountability for energy in each

administrative area like, Zones, Circles, Divisions etc.

To also keep in view the need to accommodate the latestAvailability Based Tariff (ABT) introduced in Eastern

Region

WBSEB EMC

Energy Audit


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The Software Features

The software has time-linked MF to take care of

CT ratio, and changes in ratio in due course PT ratio, etc.

Grouping meter locations by defining virtual locations

To define WBSEB boundary

To define Zone, Circle, & Division boundaries

To define Substations

all of which may change over time

Processing time-of-day energies of virtual locations

To arrive at load curves for each area

To arrive at peak demand of each area

To arrive at peak contribution factor of each area

A network management software is also used

WBSEB EMC

Energy Audit


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The software can give the record of meters with serial

number, Make, the location at which the meter is connected,

MF, date of installation, testing etc.

This will help in keeping a central record and track of healthof the thousands of meters

The Software Features-Contd.

WBSEB EMC

Energy Audit


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ENERGY ACCOUNTING

( EHV SYSTEMS 66 kV above)

Losses in EHV system is subjected

to measurement uncertainty, hence

accuracy of overall metering system

is important

0.2 class metering with instrument

transformer error compensation has

been provided Phase error and ratio errors can be

compensated separately

WBSEB EMC

Energy Audit

E A di


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Build in

PACTLAN

Sub Rack

connector

Data Communication System

Single Point

connection

WBSEB EMC

Energy Audit

ENERGY ACCOUNTING E A dit


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ENERGY ACCOUNTING

(33 kV & 11 kV)

Premier Meters of 0.5 class have been

installed at all incoming and outgoing

feeders

Each meter is a revenue grade meter, suited

for TOD and Two part tariff application

Supports integration to the overall scheme

Extends all features of the traditional

metering to the substation

Logs 6 parameters for 45 days

Independent port for connection to the

remote meter reading set up

Common metering LAN has been provided

for single point remote communication link

WBSEB EMC

Energy Audit

E A dit


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Telephone

line

Data

Communicatio

n Device

Net Box

Interconnection of the Metering System

(both 0.2 & 0.5 Class)

WBSEB EMC

Energy Audit

E A dit


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WBSEB EMC

Energy Audit

Energy Accounting:TopologyNet energy input to

WBSEB is measured

Net energy input to Zones

is measured

Circles CirclesZone

Zone

Zone

WBSEB

Circles Circles

Circles Circles

E A dit


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WBSEB EMC

Energy Audit

Energy Accounting:TopologyNet energy input to a

Circle is measured

CIRCLE

Division

Division

Division

Division


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E A dit


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WBSEB EMC

Energy Audit

The Software Features The software has time-linked MF to take care of

CT ratio, and changes in ratio in due course PT ratio, etc.

Grouping meter locations by defining virtual locations

To define WBSEB boundary

To define Zone, Circle, & Division boundaries

To define Substations all of which may change over time

Processing time-of-day energies of virtual locations

To arrive at load curves for each area

To arrive at peak demand of each area

To arrive at peak contribution factor of each area

A network management software is also used


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Energy Audit


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WBSEB EMC

Energy Audit

Sample Report Formats

Energy Audit


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Comprehensive monthlyenergy accounting & MIS for efficient

operation of System

Energy received by WBSEB & loss in system (upto 11 kV outgoing feeders)

Energy received by each Zone, Circle & Division

Energy received at each Substation of a Division

Energy sent out from distribution feeders

Load pattern for each of above

Load duration curves, peak contribution factors etc.

Voltage profiles .. and much more

Covers not only energy accounting but information for Load Management, Load

Forecasting, and Demand Side Management as well

This is comprehensive Metering Project with complete IT support

WBSEB EMC

Energy Audit

System output

Energy Audit


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Parameters Maximum Value Date, Time & Day

Apparent Demand 39.7* 24/12/2003 17:30 Wednesday 10.4 03/12/2003 05:00 Wednesday

Reactive Demand 20.7* 04/12/2003 18:00 Thursday 3.5* 03/12/2003 05:00 Wednesday

Active Demand 34.4 15/12/2003 17:00 Monday 9.8 03/12/2003 03:00 Wednesday

Power Factor (At Peak MVA Demand)

0.61Load Factor

0.86

Net Input Energy (Upstreams) 16304

Energy Output (Consumption) 15706

Loss (%) 3.67

Summary Report - Demand and System Parameter From : 01/12/2003 To 31/12/2003

Location Name

Address

Bidhannagar-I Consumption

WBSEB\Distribution System\Kolkata\BidhanNagar\Bidhan Nagar-I\

Energy Report

Loss (Energy) 598

Diversity Factor (Between feeders) 1.59

Operating Conditions

Minimum Value Date, Time & Day

Feeder Average Availability Duration Index (FAADI) : 79.03

MW

MVA

MVAr

MW

MVA

MVAr

%Lag

MWh

MWh

MWh

%

48Total Number of Power Failure (No Voltage Condition)

Per Feeder

550Total Number of No load / low load (


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From : 01/12/2003 To 31/12/2003Contribution and Peak Day variation report

Bidhannagar-I Consumption

Load Curve of Sub-Station on Peak Load Day (Monday , 15-12-2003) for Bidhannagar-I Consumption

M1 33/11 kV S/S M2 33/11 kV S/S M3 33/11 kV S/S M5 33/11 kV S/S Salt Lake Grid S/S

Time of Day (Hrs)

00:00

23:00

22:00

21:00

20:00

19:00

18:00

17:00

16:00

15:00

14:00

13:00

12:00

11:00

10:00

09:00

08:00

07:00

06:00

05:00

04:00

03:00

02:00

01:00

00:00

Demand(MW)

11

10

98

7

6

5

4

3

2

1

0

Day wise Peak Demand for Sub-Station in Bidhannagar-I Consumption

M1 33/11 kV S/S M2 33/11 kV S/S M3 33/11 kV S/S M5 33/11 kV S/S Salt Lake Grid S/S

Dates

Wed

31-12-2003

Tue

30-12-2003

Mon

29-12-2003

Sun

28-12-2003

Sat

27-12-2003

Fri

26-12-2003

Thu

25-12-2003

Wed

24-12-2003

Tue

23-12-2003

Mon

22-12-2003

Sun

21-12-2003

Sat

20-12-2003

Fri

19-12-2003

Thu

18-12-2003

Wed

17-12-2003

Tue

16-12-2003

Mon

15-12-2003

Sun

14-12-2003

Sat

13-12-2003

Fri

12-12-2003

Thu

11-12-2003

Wed

10-12-2003

Tue

09-12-2003

Mon

08-12-2003

Sun

07-12-2003

Sat

06-12-2003

Fri

05-12-2003

Thu

04-12-2003

Wed

03-12-2003

Tue

02-12-2003

Mon

01-12-2003

Demand(MW)

40

35

30

25

20

15

10

5

2882 / WBSEB

WBSEB EMC

Energy Audit

Energy Audit


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Parameters Maximum Value Date, Time & Day

Apparent Demand 175.2* 24/10/2003 19:45 Friday 60.2 04/10/2003 12:00 Saturday

Reactive Demand 68.1* 27/10/2003 17:30 Monday 18.0* 07/10/2003 04:00 Tuesday

Active Demand 166.0 24/10/2003 19:45 Friday 56.7 04/10/2003 12:00 Saturday

Power Factor (At Peak MVA Demand)

0.64Load Factor

0.95

Net Input Energy (Upstreams) 78855

Energy Output (Consumption) 78038

Loss (%) 1.04

Summary Report - Demand and System Parameter From : 01/10/2003 To 31/10/2003

Location Name

Address

Import from Kasba

WBSEB\Transmission System\Kolkata\Kasba\

Energy Report

Loss (Energy) 817

Diversity Factor (Between feeders) 1.02

Operating ConditionsMinimum Value Date, Time & Day

Feeder Average Availability Duration Index (FAADI) : 49.98

MW

MVA

MVAr

MW

MVA

MVAr

%Lag

MWh

MWh

MWh

%

0Total Number of Power Failure (No Voltage Condition)

Per Feeder

1Total Number of No load / low load (


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Detailed Operational SummaryUtility - WBSEB Import

Load

Factor

Average

Availability

Energy Balance Supply Reliability Voltage Conditions

Diversity

Factor

Base Demand

Active

(kW)

Apparent

(kVA)

Reactive

(kVAr)

Date & TimeVoltag

Level

Peak Demand

Power

failures

(No

Voltage)

No load

/ lo w

load (80% >85% >90% >95% >98% 100% Total

1 Kolkata 80 4 10 28 99 295 36 552

2 Berhampore 32 1 6 30 61 135 1 266

3 Burdwan 20 4 9 14 46 97 6 196

4 Midnapur 15 3 8 11 51 107 5 200

5 Siliguri 20 5 11 32 59 112 4 243

Total::: 167 17 44 115 316 746 52 1457

Computation Of Reliability Index of 11kV/6.6kV/6kV

Feeders for the month of November,2003 under WBSEB.

Energy Audit

WBSEB EMC

Energy Audit


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WBSEB EMC

Energy Audit

Report on Loading of Transformer and high-loss lines

HIGHER LOADING TRANSFORMERS From : 01/12/2003 To 31/12/2003Substation Name Transformer kVA

Capacity

Loading (%)

M3 Transformer-1 5000 68.85

Narayanpur Transformer-4 5000 67.16

Narayanpur Transformer-3 5000 66.77

Chandiberia Transformer-1 6300 65.62

Chandiberia Transformer-2 6300 64.81



Bagjola Transformer-1 6300 60.31


Energy Audit


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WBSEB EMC

Energy Audit

LINES HAVING HIGH LOSS PER KMTo Node Conductor

Name

Voltage Line Length

(km)

Energy Loss

(kWh)

Energy Loss

(kWh/k

m)

Voltage Drop

Per

Phase

(kV)

Voltage Drop

Per Phase/km

Tapping at Agarpara 2

DOG 33 4.9 99034.4 20211.1 0.66 0.69%

Tapping at Agarpara 1 DOG 33 6.9 96470.13 13981.18 0.77 0.57%

Abdalpur in DOG 33 5.3 54756.95 10331.5 0.48 0.47%

Tapping at Agarpara 2 DOG 33 2 18123.89 9061.95 0.17 0.45%

Chandiberia in DOG 33 2.35 13040.88 5549.31 0.17 0.39%

GolaSodepur in DOG 33 1.83 8492.34 4640.63 0.12 0.35%

Sazirhat2 DOG 33 4.16 18628.69 4478.05 0.26 0.34%

Narayanpur in1 DOG 33 5.8 21009.98 3622.41 0.26 0.24%

M2 in XLPE 3x300 33 2.1 5875.61 2797.91 0.05 0.12%

Belghoria in DOG 33 3.1 8041.41 2594 0.14 0.24%

Energy Audit


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WBSEB EMC

Energy Audit

Sample study : ATC Loss computations

From the Division Level report from this project for Month of

December 03 & DCC billing/ collection Data a sample exercise

was carried out :

Div Name Input

Energy(MU)

Collected

Unit(MU)

ATC Loss

(%)

Barrackpore 19.30 15.70 18.66

Bidhannagar-I 16.706 16.29 2.44

Bidhannagar-II 19.13 12.13 36.58

Energy Audit


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Features for Energy Accounting

Meter reading at same time, henceproper accounting

Electronic meters with real time clock

Remote Meter ReadingEliminates errors in meter reading

Reduce meter reading time and efforts

Platform for the automatic energyaccounting systems

WBSEB EMC

Energy Audit

Energy Audit


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Benefits:

To WBSEB Accurate and timely energy accounting and MIS

For each Zone, Circle, Division, Substation

Energy sent out from feeders

Analysis of data gathered by the scheme will help to formulate further

action plan to reduce losses Regular (monthly) monitoring of the System

Data acquisition for regulatory purposes

Load management, Forecasting, Demand side management etc.

Paving grounds for detailed audits for 11 kV and below

Reduction of ATC losses

To Consumer Clearer insight into voltage conditions and causes

Better service in the long run

Increased confidence in Utility

WBSEB EMC

Energy Audit


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Documents

WBSEB Metering,Billing