Smart meter

1. SMART METER
Kongunadu College of Engineering and Technology
Contents:
Introduction
Multifunctional Smart Meter
Smart Energy Meter
Specifications
References

2. Introduction
 Smart meters measure your gas and electricity and automatically
send readings to your energy providers. They are currently being
installed free of charge across the UK – the Government wants every
house to have them by 2020.
 Smart meter readings are sent directly to your energy supplier via a
secure national network (DNN) created specially for the purpose.
This network is not reliant on wifi; instead it uses radio waves.
 You will get two meters to replace your current models, plus an in-
home display. This screen will show your energy consumption in the
last day, week or month. It will also tell you how much you’ve spent,
updated every half hour. Depending on the model, it may show other
information too, such as the indoor temperature, or whether you’ve
gone over-budget. At the moment, it looks like they will have to run
separately to smart heating systems- with separate displays- but their
compatibility could improve as models become more sophisticated.
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3. Cont…
 Smart gas meters are battery-powered and give readings every 30
mins. Smart electricity meters run off the mains and gives moment-
to-moment readings. The in-home display is also wired into the
mains and costs less than £1 a year to run.
 They will be provided and installed by your energy provider. If you
have different suppliers for gas and electricity, the person installing
the second meter will be responsible for ensuring it links to the first,
and that both link to your in-home display. The smart gas meter will
be around the same size as your current gas meter, and the electricity
meter might be slightly bigger. They will be tucked away like your
current ones are, however, so you probably won’t even notice they’re
there!
Kongunadu College of Engineering and Technology

4. MULTIFUNCTIONAL SMART
METER
 Multifunctional Smart Meter is a high-tech product developed in
recent years on the basis of electronic meter. Its composition and
working principle are very different from the traditional induction
meter.
 The intelligent electronic meter is mainly composed of electronic
components, its working principle is through the real-time sampling
of user power supply voltage and current, and then use special
electric energy meter IC Processing of sampled voltage and current
signals, and converted into electrical energy and pulse output is
proportional to the final processing, control through the
microcontroller, display for electric pulsequantity and output.
Kongunadu College of Engineering and Technology

5. Cont…
 We usually get smart metering of electricity when the A/D converter
makes the pulse number called pulse constant, for intelligent electric
meter, which is a more important constant, because the number of
A/D converter pulse generated in a unit of time, will directly
determine the meter measuring accuracy.
 The design principle of the current smart meter mostly adopts a A/D
converter, but also some users of intelligent electric meter
manufacturers with more households sharing a A/D converter, this
measurement can only power the time to line up, will inevitably
cause the decline of measurement accuracy, this work should be paid
attention to the features of intelligent the meter smart meter not only
adopted the design of electronic integrated circuit in the design
selection, coupled with remote communication function, can connect
with computer and the software control, so compared with the
induction meter, smart meter no matter in the performance or
operation function has a great advantage.
Kongunadu College of Engineering and Technology

6. Smart Energy Meter
Kongunadu College of Engineering and Technology

7. Cont…
Kongunadu College of Engineering and Technology

8. TECHNICAL FEATURES
Kongunadu College of Engineering and Technology
 Forwarded metering / Net metering - To help consumers to get
payment for the energy generated by them through solar power
plants or other distributed generation methods

Open protocol (DLMS) Device Language Message specification,
a generalized concept for abstract modeling of communication
entities, used for meter communication
 Integrated communication module Configurable for GSM-
GPRS/Wi-Fi, IrDA/Bluetooth
 Remote firmware upgrades
 Algorithms Contains algorithms for energy calculation and
management, theft detection, data logging etc. Remote load
connect / disconnect facility
 Anti-tamper- Anti tamper and fraud detection will be done
immediately
 Security - Password protected user login and parameter settings

9. Specifications
Kongunadu College of Engineering and Technology
 Single Phase/ Three Phase
 Connection Type : 2 wire (Single phase), 4 wire (Three phase) direct
connection
 Standards : IS 16444, IS 15959(1), IS 15959(2)
 Metrology Accuracy : Class 1
 Rated Current : For Single phase- Ib (Imax)A = 5(30)A , withstands
120% Imax. For three phase- Ib (Imax)A = 10(60)A, withstands 120%
Imax
 Rated Voltage : 240 V (-40% to +20%) Single Phase
 Starting Current : 0.2% Ib
 Frequency : 50 Hz +-5%
 Load Contactor : Latching relays
 Display : LCD
 LED indicators : Line, Tamper, Export, kWh
 Communication port/methods : GSM-GPRS/WiFi
 Communication protocol : DLMS COSEM

10. Kongunadu College of Engineering and Technology
Reference:
 https://www.youtube.com/watch?v=c6DOm7whoiY
 https://ieeexplore.ieee.org/document/8031970
 https://ieeexplore.ieee.org/document/7365417
 https://ieeexplore.ieee.org/document/6876215