Gas Technology Services P/L CMRS Customer Meter Reading Service Presentation

Gas Technology Services P/L

• Overview of Gas Technology Services (GTS) • Overview of Gas Measurement • How flow computers log metering data • Extraction of metering data from flow computers • Overview of CMRS Online • Retail clients accessing CMRS

Overview of GTS

• Independent Company – > 25 years experience in Gas – National experts in gas flow – Analysis of Gas Composition and Odour – Testing of Gas Appliances for Manufacturers – Calibration of Gas Detectors / Gas Equipment • Gas Flow Metering – Field Calibration – Data Collection

Overview of Gas Measurement

• How is Natural Gas Flow Measured?

• How is Natural Gas Flow Recorded?

Overview of Gas Measurement

• Effects of Pressure on Gas Volume • Effects of Temperature on Gas Volume • If you pressurise and cool gas, you can fit more in a given area • Resulting in a correction factor

Gas Flow Corrector Calculates true volume in Sm3 Records Hourly Data

Pressure measured in Kpa Calculates True Volume (Sm3) Turbine Meter (Uncorrected flow) Temperature in Deg C

Corr.Factor = (Gas Press+101.325) X (273.515) (Gas Temp. + 273.15) X 101.325 ) X FPV 2 Corrected (True) Volume = Uncorrected Volume X Correction Factor Insert Gas Metering Pressure (P) Insert Gas metering Temperature (T) Insert Fpv (Supercompressability) Ambient Temperature

Calculated Correction factor (CF)

: : : :

1.6622

70.000

20.00

1.0000

20

kPa Deg.C

Deg.C

Base Pressure (BP) Base Temperature (BT) Zone Pressure (ZP) 101.3

15 101.3

kPa Deg.C

kPa

1Cubic Meter recorded by Mech.Gas Meter = (Uncorrected Volume) 1.662

Standard Cumic Meter (Corrected Volume)

Corr.Factor = (Gas Press+101.325) X (273.515) (Gas Temp. + 273.15) X 101.325 ) X FPV 2 Corrected (True) Volume = Uncorrected Volume X Correction Factor Insert Gas Metering Pressure (P) Insert Gas metering Temperature (T) Insert Fpv (Supercompressability) Ambient Temperature : : : :

2500.000

10.00

1.0000

20

kPa Deg.C

Deg.C

Calculated Correction factor (CF) 26.1326

Base Pressure (BP) Base Temperature (BT) Zone Pressure (ZP) 101.3

15 101.3

kPa Deg.C

kPa

1Cubic Meter recorded by Mech.Gas Meter = (Uncorrected Volume) 26.133

Standard Cumic Meter (Corrected Volume)

How flow computers log metering data • Metering data is logged at 60 min intervals • Gas Temperature in Degrees Celcius • Gas Pressure in kilo pascals (gauge) (kPaG) • Uncorrected Volume in cubic meters (m3) • Corrected Volume in standard cubic meters (SM3)

Extraction of metering data from flow computers • Daily extraction – telemetry sites • Monthly extraction – non telemetry sites

GSM Telemetry OR Desktop Modem Daily data extraction GTS Port Melbourne Monthly data extraction Hand Held Reader

Collection of raw hourly Data

Extracted metering data

What happens to data once it has been collected?

Validation of extracted metering data • Metering Data is uploaded into CMRS and validated • What is Data Validation?

Validation of extracted metering data • Data Validation is – The application of predetermined tolerances to Gas Measurement Attributes

Validation of extracted metering Data For a given Metering site • Expected Correction Factor • Expected Gas Pressure • Contract Maximum Hourly Quantity Limit • Contract Maximum Daily Quantity Limit • More than 72 hours consecutive zero flow records

Validation of extracted metering Data Metering data can be wrong • Mechanical Meter Failure (Results in zero records) • Flow Corrector / Data Logger Can Fail – Pressure Transducer (Out of calibration or faulty) – Temperature Transducer (Out of calibration or faulty) – Corrupt Profile Data

Validation of extracted metering data For Validation Log Example Please refer to hand out

Validation of extracted metering data What can happen if Metering Data is not Validated?

300000 300000 250000 250000 200000 200000 150000 150000 100000 50000 100000 0 50000 0 Month Dec-01 Jan-02 Feb-02 Mar-02 Apr-02 Metering Pressure fault example Recorded Volume MJ 113,697,012 124,343,856 117,163,566 123,691,035 22,836,918 True Volume MJ 128,447,208 126,873,381 121,242,526 125,964,008 23,437,327 Difference MJ 14,750,196 2,529,525 4,078,960 2,272,973 600,409 24,232,062 Income Lost $ 44,250.59

$ 7,588.57

$ 12,236.88

$ 6,818.92

$ 1,801.23

$ 72,696.19

Recorded Volume MJ True Volume MJ

Date of Readings

Previous example can cause

• Unnecessary substitution • Un monitored MHQ & MDQ breakages • Incorrect billed customers • Times wasted • Unhappy customers

Overview of CMRS On - Line

• Web based Gas meter reading service • For Gas Retailers • For Gas Retail customers

Conclusion

• Validation of gas meter data is important • The service provided by GTS ensures that Retailers have correct metering data for client contracts • Technical support provided by GTS • Retail clients can access their metering data online