Smart Prepayment Solutions for PV/SSEG

What is AMI (aka Smart Metering)? Advanced Metering Infrastructure (AMI) AMI is a smart metering solution that provides two way communications between an AMI system and various metering devices An AMI system is capable of collecting & analysing meter data, including meter energy usage, events, power quality information and many more AMI is an end-to-end solution, including, systems, Data Concentrators, metering devices and Customer Interface Units (CIU)

Why use AMI / SMART Prepayment Solution? REDUCE DEBTS / ARREARS Late/non payments Increasing debt / arrears MONITOR FRAUD Preventing revenue collection REMOTE METER ACCESS Field evaluations Customer queries Prepayment (upfront) Arrears collection through vending system Tamper functionality Fraud monitoring with AMI system Remote meter reading Auditing of the meters (from your office) REDUCE ADMIN. COSTS Disconnect/reconnect remotely PV/SSEG Support Import and export energy measurement LOAD MANAGEMENT Remote changes to demand thresholds Remote connect & disconnect of supply control switch Four quadrant measurement & charge registers for prepayment AMI system Change monitored threshold value (+P) End to end functional integrity From initial site audits to backend system implementation the integrity of the system is maintained

Smart Prepayment Functionality

Smart Prepayment Functionality Data Concentrator Local & Remote Communications Core Smart Meter Functionality Real Time Clock (RTC) 4 Quadrant Measurement Time of Use (TOU) Core STS Prepayment Functionality Data collection Diagnostics Account (Prepayment / Post-payment) Energy registers Data Uploads STS token transfer Charge Registers Load Profiles Upgrades G3-PLC Total Export Charge Total Import Charge Billing / Daily Profiles IEC62055-41/51 Token Transfer kWh Standard Event logs Token Transfer Currency Prepayment Event logs Fraud Detection logs Power Quality profile Load Management Supply Control Switch 1ph DIN-Rail Smart Prepayment meter

Prepayment Charge Register Objects Mode: Prepayment Account Charge Register (-A) Total Reverse Energy Decrement Account Neutral effect Increment the Account Charge Register (+A) Total Forward Energy Decrement Account

Energy Registers Energy Registers Four (4) quadrant measurement provides for : -- Import [forward] energy (taken from network) -- Export [reverse] energy (generated by alternative source OR reverse connection) -- Active and reactive energy registers -- Rated energy registers (for each available TOU rate)

Mains Quality Profile Information

Typical smart prepayment meters

Solution Overview

Technology & Platform - Overall Solution Data Collection Data validation, Storage, Billing CIM Interval & register data AMR MDMS Bill cycle meter data Meter information Asset & Work Order Management HES Distribution Operations, SCADA, GIS Meter transactions SAP HES STS prepay tokens Customer data, transactions, arrears WAN Utility vending and management Customer data, billing values Smart STS Prepay meters DC Vending System e-data warehouse Cashiers Administrators Engineering Tokens Consumer Customer Portal Customer’s Interface Banking Meter 3rd party service providers Field Technician Consumer

Data Concentrator – Web Interface Overview The DC450 has a powerful Web interface that enables detailed DC configuration and visibility of PLC communications statistics Main Functions Device configuration Gathering extensive communication statistics per device Access the device communication statistics Manually adapt parameters Execute direct commands Send PING commands to individual or group of meters Monitor G3-PLC communication in real time Graphical view of the G3 PAN topology Powerful Utility Engineer’s tool to analyse communications

DC Web Interface – G3 PAN Topology P160 Customer Interface Unit E460 Smart Meter E460 Smart Meter DC450 G3-PLC Concentrator

Typical Installation – Split Smart meters BENEFITS: Enhanced revenue protection Remote meter auditing- reduced operational cost Read meter registers remotely Load limiting, tamper sensing, power quality data for improved network analysis Remote disconnection and reconnection Import and export registers (for PV/SSEG support) Remote device firmware update House The Customer Interface Unit (CIU) simply plugs into electrical outlet in the house. The CIU provides an interface for the customer to check electricity consumption, rate information, instantaneous power etc. In prepayment mode, the customer may enter credit tokens into the keypad G3-PLC Data Concentrator SMART Split Meter The split meter is typically installed outside the house, in a street or pole top kiosk The PLC communications links the CIU to the meter. The CIU must be paired to the meter (using meter serial number) Customer Interface Unit G3-PLC G3-PLC G3-PLC

Device Management (HES) Tasks Scheduling of tasks Reading tasks (e.g. reading registers) Control tasks (e.g. remote disconnect) Summary of tasks shows status of each task and whether the task was successfully executed or not

AMI System – Dashboard Views

AMI System – Dashboard Views

Instantaneous Values - Locally Meter instantaneous values may be read using a meter software tool Prepayment values may be saved in text file format or exported to MS Excel Powerful on site (or workshop) fault finding features which enables the analysis & capture of instantaneous values on site Same values may be remotely read by the Smart Meter system

Instantaneous Values - Remotely When meter is installed in an on-line mode, with Data Concentrator and Smart Meter System, then available instantaneous values may be accessed remotely -- Prepayment credit -- Power quality information -- Voltage, current, PF, frequency, power etc. Powerful remote auditing and fault finding features Reduces operating costs of the utility as this level of meter analysis and auditing can be done by Utility Engineers from the office

Standards & Specifications

Important International & Open Specifications Enterprise Systems Web services IEC 61968 series for application integration between Enterprise Resource Planning Systems: (ERPS), MDMS, HES and other external systems Meter Data Management System (MDMS) Vending System IEC Common Information Model (CIM) Head-end System (HES) IEC62056 suite (dlms), IPV6, TCP/UDP Network Gateway (DC) Metering Device Metering Device Metering Device IEC 62055-41/51 IEC 62055-41/51 IEC 62055-41/51

Important functionality to specify Important smart & prepay functionality to specify in respect to SSEG and PV Four (4) quadrant measurement Separate import and export energy registers (+A, -A) Separate import and export power registers (+P, -P) Customer interface or meter’s display must show direction indicators Customer interface or meter’s display must provide access to all energy registers (import and export) Meter must support net energy register (import – export) Meter’s prepayment account must support charge registers Prepayment charge register functionality Ability to set charge to be neutral, decrement or increment the prepayment account Ability to be able to set a ratio value of payback to the prepayment account for reverse or export energy