CG’s Contribution in

Puducherry Smart Grid Pilot Project

Deployed 80 nos. of Single Phase meters, 1 no. of DCU and 1 no. of GPRS router towards Smart Metering.

Sponsored one 12.5 kVA “StreetSmart” street light automation panel for the Smart Grid Pilot Project.

Transformer Monitoring Operation and Control

Features of Smart Meters at a Glance

Smart Meters meet the needs of residential market Provides AMR/AMI solutions to the distribution companies on a

modular platform. Meter can be used in the place where only energy monitoring

functions is required. It can be used in the place where TOU and/or load profile

functionality is required in the de-regulated electric market. The meter has two profile recorders .

Hourly Incremental value Daily absolute value. Storage of values up to 3 months. Incorporates two internal breaking relays to carry out

breaking and reconnection of supply.

Features of DCU at a Glance

Low Voltage Supervision Module which is capable of monitoring the load of the transformer.

The DCU is capable of talking to individual meters with the help of existing low voltage circuit on PRIME communication system within the CENELEC A band.

It has an internal database for storing the meter data and profile details.

Communication Adopted These single phase meters use DLMS/COSEM as communication protocol

for connecting to DCU on application level.

Low Voltage PLC is the communication media being used between individual meters and DCU.

These meters are capable of sending data using the same existing low voltage power line which comes to our house. It uses PRIME as a PLC communication system which is specifically designed to be employed in Smart Metering application.

This PRIME is based on an OFDM modulation within CENELEC A band from 9 to 95 kHz. OFDM is a very robust modulation system against the impulsive noise and frequency selective noise in the Low Voltage line.

This PRIME supports 6 different modulation schemes to adapt to the media and allows us to achieve transmission speed between 21 and 128 kbps between their Physical layer.

About Network Topology The DCU, being a PRIME Base Node manages the network

topology and automatically adapts to the changes in the network. The meters, being a Service Node incorporate the functionality of Service Nodes.

These meters can automatically behave as repeaters for other nodes that are not able to communicate with DCU or Base Node. So, these repeater nodes will help other meters in getting registered with DCU by way of promotion.

Thus, it can form a mesh network and any meter which is introduced in the network will be detected automatically irrespective of the make of the meter as long as the new meter supports PRIME protocol.

The following screen depicts the PRIME topology and shows us how a network is built within in the circuit.

Communication with Head End System

The DCU cabinet installed in the DAT-II transformer has a GPRS router in which SIM card is inserted and GPRS connection is made available for viewing the data through internet. The SIM has a dynamic IP address and is mapped to DNS name with the help of DYNDNS service provider.

With the help of DNS name, the HES will be able to communicate with DCU. The communication between DCU and HES is going to be on SOAP based web services. HES will read the data from DCU on XML and then interpret and present the data in a report format. Thus, the entire set of meters parameters, profile data, event messages can be monitored using the link http://cgpondy.dyndns.org

Future Plans

" This project has proven Smart Metering technologies to be deployable and helpful in a 100% Indian scenario. PLC communications have been successful to enable on demand power consumption data.

Now it's time to move on to explore other communication technologies. RF based Zigbee AMI pilots are planned. Thus we will be able to see how RF technologies can work as a complementary technology for PLC communications in different Indian scenarios. Combining both technologies will for sure help to extend power consumption auditability all over India.

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System Architecture

Future Plans

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Control’s Street Light Operation by,

• Astronomical Timer based ON-OFF

ON and Off as per Sun Set and Sun Rise Time, calculates every day

• Ambient Light intensity based On-Off

Useful on high ways during over cast situations

• From Web Site

All lights can be turned ON or OFF with a mouse click

• Programmable Warm Time Duration and Voltage

Warm time voltage can be programmed to improve effective life of

HID Lamps, up to 10% boost over input line voltage

SLA Solution Features:

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Maintenance of Street Lights made easy with,

• Central Monitoring through website from any where

• Monitor Instantaneous Status Parameters; V, I, kWh etc

• Logs periodic data, retains for one year, can be accessed

through web site and exported to Excel sheet

• See the status on Google Map at a glance and find out whom to

contact during fault

• Instant SMS alerts during faults

• Monitor’s 67 types of faults and generates SMS alerts with exact

fault details, two mobile numbers can be programmed

SLA Solution Features:

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Saves electricity by,

• Regulating voltage fed to the street lights

• Motorized autotransformers controls output voltage with 1%

accuracy

• Saves 10-20 % electricity by regulating at fixed voltage level

SLA Solution Features:

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• Offers Dimming and load control schemes

• Lamp ON time is split into three programmable time zones

• Time duration and voltage level is programmable

• With Nominal dimming level can achieve up to 30% saving

SLA Solution Features:

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Effective and Efficient Operation

• Programmable Lamp Cycle: Duration and Voltage Level

Warm -> Nominal -> Zone 1-> Zone 2 -> Zone 3

• Protection from Input Over Voltage or Output over load

• Generates SMS Alerts on Lamp failures

• Improves life of lamps

• Simple Web site administration, role based login rights

• Set Reminders for web accounts for periodic maintenance activities

like lamp cleaning, pole painting etc

• Generate various MIS Reports

SLA Solution Features:

Electricity Consumption before StreetSmart Implementation

Energy Consumption after StreetSmart Implementation

2020

Global Transformer Monitoring Operation & Control

G-TMOC

Why Transformer Monitoring ?

Transformer monitoring is the answer to the need of feeling the pulse of your transformer.

Helps to decide whether the transformer is still “fit enough” to withstand a temporary overload?

Enables Loading of transformer for maximum economic efficiency

Possible to detect first sign of failure condition

Helps to manage and extend transformer life

Reduces unscheduled outages and equipment failures

Complement information for on-time and cost effective maintenance.

Saving on personnel, unmanned substationsPreventing an outage of a transformer.Less redundancy in the network

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Integration Capabilities

SCADA Transformer-At Site

Computer

G-TMOC

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PRIVATE PRTOECT

ED LAN

ETHERNET INTERFACE DNP 3.0 PROTOCOL

ETHERNET

INTERFACE-IEC

61850 PROTOCOL

WEB-

SERVER

COPPER WIRES

COPPER WIRES

FIBER OPTIC ST INTERFACE

IEC 60870-5-101-PROTOCOL

Control-Room-Touch Screen

RS-48

5/

MODBUS

USB 2.0