1 prepayment metering in rural uae areas prof. dr. e. el-shirbeeny electric power research...
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PREPAYMENT METERING IN RURAL UAE AREAS
Prof. Dr. E. El-ShirbeenyElectric Power Research Laboratory
Abu Dhabi Water & Electricity Authority
ADWEAADWEAADWEAADWEA
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IN THIS PAPER
• National Overview
• Drivers
• Technology & Barriers
• Pilot Scheme
• Future Developments
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LOCAL CONDITIONS
Maximum ambient temperature: 50 degCHumidity could reach 100% LV AC operating voltage 415 VFarms are scattered on wide desert areasDifficult transport and accessHigh callout costs
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TYPICAL RURAL LOADS
7 kW0.90 p f
water ne twork
60 kW0.85 p f
water we lls
320 kW0.79 p f
greenhouses
FARM Swith
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REVENUE MANAGEMENT PROBLEMS
• Delays in payment due to customer apathy
• Social values and difficulty in disconnecting
• High rate of debt accumulation
• Use of old inaccurate meters
• Difficult meter reading
• Illegal reconnections
• Unmetered supply
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WHY PREPAY METERS• Cut down bad debts
• Protect revenue
• Reduce operating costs
• Simplify sales operations
• Higher metering accuracy
• Encourage energy saving
• Enhance customer services
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SUPPORTING SYSTEMS
• Vending/Payment Terminals
• Billing System
• Databases
• Operating Platforms
• Communication Networks
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SELECTION CRITERIA
• Minimum customer interaction• Simplicity and ease of installation• Maximum utilization of available facilities• Efficiency• Reliability• Minimum maintenance• Scalability• Security• Cost
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SECURITY MEASURES
1. No access for Unauthorized party
2. Alternative means in case of system failure
3. Concurrent operation with a redundant system
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CHALLENGES1. Prepayment is not “off-the-shelf” technology
2. Prepayment = shift in mind of service provider
3. Community acceptance
4. Modification cost of metering & billing system
5. Need of strong technical support and training
6. Reliable communications and IT systems
7. Harsh local operating environment
8. Higher farm loads
9. Extra protection
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PILOT SYSTEM <online payment>
Control Center
DBBilling System
Data Concentrator
Local Transreceiver
MeterDisconnect Load
CustomerPayment Terminal
CustomerPayment Terminal
Data Concentrator
Local Transreceiver
MeterDisconnect Load
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ADVANTAGES OF SELECTED SCHEME
• Simpler software and hardware• Real-time integration with billing system• Centralized database and security modules• More vending points at a lower cost of ownership• Easier system management• More efficient arrears collection• Increased database and encryption security• Easier data management and scalability• Very quick setup of online vendor at lower cost
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FUURE DEVELOPMENT1. Extension to water & gas services
Data Concentrator
Electricity Meter
Electricity Meter
Electricity Meter
11/0.415 kV Distribution SS
Electricity Meter
Water Meter
Gas Meter
Radio Receiver
PLC Modem
Radio Transmitter
Data Collector
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FUTURE DEVELOPMENT
2. Applying online prepayment scheme to:
– large commercial customers
– Governmental buildings
3. Upgrading to AMR
4. Integration in distribution management
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