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Transcript of 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
omputerised ash ollection
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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
omputerised ash ollection
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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
M3 Transformer-2 5000 61.89
M3 Transformer-3 6300 60.94
Bagjola Transformer-1 6300 60.31
M1 Transformer-2 6300 58.96
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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