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AMI

Advanced Metering Infrastructure

Advanced Metering Infrastructure (AMI) is an integrated system of smart meters, communications networks, and data management applications that enables two-way communication between utilities and customers. AMI is an essential part of Smart Grid System which are increasingly becoming order of the day. Smart Grid systems enable utilities to better manage generation, distribution and billing of power and reduce the power losses and pilferages. With growing sense of responsibility in society towards enviornment, efficient power management will be required which in turn will require AMI solutions. Eagle Infotek has designed and developed one of the most contemporary AMI solutions.

Overview of AMI Solutions

Features of AMI

Building Blocks of AMI

Smart Meter
Single Phase Meter:Technical Specifications
Meter SOC 71M6541F
Memory Used 64KB flash, 5KB RAM
EEPROM 512 KB
IEC Standard 13779
Communication
  • Local communication: RS 232
  • Meter To DCU: PLC
  • DCU to Utility: TCP/IP
    		•
    Meter display 6 digits display with legends
    Accuracy Class 1.0
    Parameters to be measured/td> Instantaneous-V, I, kW, power factor Cumulative-Active Energy, Apparent Energy, Average power factor. Previous month parameters: MD in kW, kWh, Average PF
    Time of use/ Time of use Should support 4 tariff registers/ 6 time zones per day
    Meter housing Plastic IP 51
    Single Phase Meter:Operational Specifications
    Reference Voltage 240V (-40% to +20%) Single Phase
    Current Rating 5-30 A, 10-60A
    Starting Current 0.2% of lb
    Operating Temperature Range -10 Deg C to 55 Deg C
    Frequency 50 Hz +/- 5%
    Humidity <=95
    Influence Quantities As per IS 13779
    Power consumption of meter As per IS 13779
    LED indicators LED indicators for Pulse/kwh, Tamper, Connection/Disconnection, Earth leakage, Status of the Relay. Connection/disconnection should be logged as events.
    Alarm Alarm for power on/off, under/over voltage, Over current, Mal functioning of diagnostic events shall be generated and communicated to the HES and the while meter reading updating to the Server.
    RTC & Time Synchronization Meter should have RTC with 20 years calendar programmed in the memory and provision for time synchronization
    Meter Housing High grade engineering plastic IP 51, provision for sealing meter cover to meter base, provision for sealing terminal cover, provision for sealing any other compartment for communication module.
    Tamper/Event recording Total 50 events to be recorded. All tamper defined must be detectedand logged as tamper events on IFO basis along with the date and time of occurrence and restoration, total tamper counts with tamper identification.
    Anti-Tamper features As per CEA Regulations
    Reading frequency
  • Proposed once in 24 Hrs. automatically. Alarms are to be communicated on their occurrence.
  • Alarms are to be communicated on their Occurrence. On demand Meter reading facility is available.
    		•
    Power quality information Logging of quality of supply events like Power ON/OFF Over/under voltage Over current(50 events)
    Measuring Elements Meter should have both measuring elements- one in phase and other in neutral path
    Load Survey/Interval Data 35 days data to be recorded with 30 minutes integration period for active Energy, Average Voltage, Average current, In addition to Cumulative mid night kWh (00:00 Hrs.)shall also be recorded for 35 days
    Data display facility Data Display shall have following 3 modes:
  • Auto Scroll
  • Scroll with push button
    • High resolution
    Programmability The parameters, limits/values should be programmed from remote with the adequate security mechanism. Updation from remote should not affect the meteorology of the meter.
    Load Control Relay for connection/disconnection Phase and neural Disconnection on the following conditions:
  • Over Current
  • Load control limit
  • Pre-programmed Tamper conditions
  • Disconnect signal from Utility Control Centre such as balance unavailable in case pre-paid facility is availed by consumer. Load Control limits shall be programmable. The disconnection mechanism is as follows:

    • Load Control limits shall be programmable.
  • The switch re-connection shall be decided by meter locally. It will try to re-connection the load up to 3 times, with 5 minutes interval
  • If the consumption is still more above the limit, the procedure as defined above in i) and ii) shall be repeated. Reconnection mechanism:

    • Reconnection shall normally be done from HES. In case of failure of communication/HES, reconnection shall be possible through HHU locally and the same shall be password protected.
    Three Phase Meter:Technical Specifications
    Meter SOC MCF51EM256
    Memory Used 256KB flash( dualbank), 16KB SRAM
    EEPROM 512 KB
    IEC Standard 13779
    Communication
  • Local communication: RS 232
  • Meter To DCU: ZigBee IEEE 802.15.4
  • DCU to Utility: TCP/IP
    		•
    Meter display 4*32 segments custom type
    Accuracy Class 1.0
    Parameters to bemeasured Instantaneous-V, I, kW, power factor Cumulative-Active Energy, Apparent Energy, Average power factor. Previous month parameters: MD in kW, kWh, Average PF
    Meter housing Plastic IP 51
    Three Phase Meter:Operational Specifications
    Reference Voltage 240V (-30% to +30%)
    Current Rating 10-60A
    Starting Current 0.3% of lb
    Operating Temperature Range -10 Deg C to 55 Deg C
    Frequency 50 Hz +/- 5%
    Parameters to bemeasured Instantaneous-V, I, kW, power factor Cumulative-Active Energy, Apparent Energy, Average power factor. Previous month parameters: MD in kW, kWh, Average PF
    LED indicators kwH, kVARh and tamper
    Alarm Alarm for power on/off, under/over voltage, Over current, Mal functioning of diagnostic events shall be generated and communicated to the HES and the while meter reading updating to the Server.
    RTC & Time Synchronization Meter should have RTC with 20 years calendar programmed in the memory and provision for time synchronization
    Meter Housing High grade engineering plastic IP 51, provision for sealing meter cover to meter base, provision for sealing terminal cover, provision for sealing any other compartment for communication module.
    Reading frequency
  • Proposed once in 24 Hrs. automatically. Alarms are to be communicated on their occurrence.
  • Alarms are to be communicated on their Occurrence. On demand Meter reading facility is available.
    		•
    Power quality information Logging of quality of supply events like Power ON/OFF Over/under voltage Over current(50 events)
    Measuring Elements Meter should have measuring elements in each path- one in phase and other in neutral and earth path
    Data display facility Data Display Shall have following 2 modes
  • Auto Scroll
  • Manual
    		•
    Programmability The parameters, limits/values should be programmed from remote with the adequate security mechanism. Updation from remote should not affect the meteorology of the meter.

    Communication Modules
    We have developed meters having modems based on two types of communication technologies
    • PLCC (Power Line Carrier Communication)
    • ZigBee
    PLCC
    PLCC module is developed using Echelon's proven modem technology. Echelon is world leader in developing and manufacturing Smart Meters using PLCC technology. We are development partners of Echelon.
    • Follows OSGP (Open Smart Grid Protocol) - unlicensed open standard.
    • CENELEC A-band compliant power line communication device.
    • Modulation follows BPSK Narrow Band Power Line Channel for Smart Metering Applications
    • PLC Module implements both the ETSI TS 103 908 and ETSI GS OSG 001 high-performance narrow band power line (PL) specification.
    • PLCC modem offers very low power consumption.
    • Intelligent, directed repeating of power line signals for optimal bandwidth utilization. DCU coordinate with OSGP meters to create an adaptive, directed, self-healing mesh.
    ZigBee
    • Developed for high performance ZigBee based AMI applications in the 2.4GHz to 2.5GHz, 915/868MHz, and 433MHz ISM bands.
    • Very low power consumption.
    • Mesh Topology based communication architecture which ensures firm connectivity of meters with the DCU.
    • The AMI ZigBee Cluster is based on PAN ID which ensures constant connectivity among them & completely prevents connectivity with non-AMI based ZigBee's.
    • Integrated PA, Tx harmonic filtering, LNA, and switches.
    • High efficiency: >55%
    • Offers strong security to prevent mischief and tolerant of interference from other radio devices.

    Data Concentrator Unit (DCU)

    Data Concentrator Unit(DCU) is a gateway for communication of data between the Smart Meter and the Meter Data Management System(MDMS). DCU collects information from the Meter on a scheduled basis and stores the data, which can be accessed by the MDMS.

    Features

    Meter Data Management System (MDMS)

    MDMS is a software application that sits at the central location in the Utility department. It collects and stores data from the meter; stores customer data, meter information, information of concerned employees at utility. It processes various data and presents it as meaningful information to various players. Customers can view their updated as well as historical consumption on MDMS.

    MDMS has been designed using SOA framework and open source technologies. It is highly scalable and can support data from 1 million meters. It is designed to store more than 5GB of data per day. It generates pre defined reports for utility company to analyse and act. It also has APIs to connect to third party solutions like ERPs, Billing, CRM. SMS gateway, e-mail gateway etc.

    Major components

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