scada for power distribution

IEEE Hyderabad Section
Joint Chapter of PES/IAS Societies
(www.ewh.ieee.org/r10/hyderabad/pesias)

Talk on

SCADA and Distribution Automation
By

Dr. NDR Sarma
10th March 2006
Venue: NTPC Conference Hall, Secunderabad


Typical Power System

Generating Plant
Step-up
transformers
Circuit breakers

Generation System

Transmission System

Transmission System

Transformers in
Bulk power
substations

Dispersed
Storage and
generation
(DSG)

Distribution System
• substations
• transformers
• circuit breakers
• feeders
• sectionalizing switches
• capacitor banks
• voltage regulators
• DSGs
• customers
- HT customers
- LT customers

Solar or
Wind
Sources
(100KW to
1MW)

Sub-transmission
system
Distribution
substation
DSG

Threephase
Primary
feeders

Sectionalizing
switch

Battery or
Fuel cells,
1 to 25 MW

Capacitor
bank

Primary
circuits

Distribution
Transformer

Industry
DSG

Photovoltaic
Power supply,
up to 100 KW

Home

Voltage

Regulator


Sub-Station Transformer


Incoming feeders


Outgoing feeders


Distribution Transformer
Location


Distribution Transformer
(1-Ph) Location


Switch at a DT


Switch on a 11kV feeder


Power System connectivity

17.6/220 kV
Sub-station

220kV Lines

EHV substations

220/33 kV
Sub-station

33 kV lines
Industry at 33 kV

11 kV lines
(feeders)

Distribution
substations

33/11 kV
Sub-station

Distribution
Transformer
11/ 0.4 kV

Industry at 11 kV

Customers
(Domestic, Commercial, Agricultural)

Power System in a typical city
EHV Sub-stations

Distribution s/s


Power System in a typical city

Distribution s/s


IT Applications to Power
• Power System Operation and Control
- Power Plant Automation
- Energy Management Systems
- Distribution Automation
- GIS Applications

Distribution Automation
• Metering and Billing
• Energy Accounting/auditing


Distribution Automation

What ?
How ?
Why ?

DA

Distribution Automation System

Generating Plant
Step-up
transformers
Circuit breakers
Transmission System

Transformers in
Bulk power
substations

Distribution
Control
Center

SCADA

Dispersed
Storage and
generation
(DSG)
Solar or
Wind
Sources
(100KW to
1MW)

Sub-transmission
system

(monitor
and
Control)

and

Distribution
substation
DSG

Threephase
Primary
feeders

Sectionalizing
switch

Battery or
Fuel cells,
1 to 25 MW

Capacitor
bank

Primary
circuits

Application Functions

One-phase
lateral feeder

(Decision support
Tools)

Distribution
Transformer

DSG

Photovoltaic
Power supply,
up to 100 KW

Home

Voltage
Regulator


Energy Management System
Generating Plant
Step-up
transformers

219 kV
248 MW

Circuit breakers
Transmission System

( monitor
Control
Center

and

SCADA

Transformers in
Bulk power
substations

Control )

and

Solar or
Wind
Sources
(100KW to
1MW)

Sub-transmission
system

Application Functions

( Decision support
Tools )

Dispersed
Storage and
generation
(DSG)

Distribution
substation
DSG

Threephase
Primary
feeders

Sectionalizing
switch

Battery or
Fuel cells,
1 to 25 MW

Capacitor
bank

Primary
circuits
One-phase
lateral feeder

Distribution
Transformer

DSG

Photovoltaic
Power supply,
up to 100 KW

Home

Voltage
Regulator


Levels of Automation

Substation Level Automation

Dispersed
Storage and
generation
(DSG)

Feeder Level Automation
Customer Level Automation

Solar or
Wind

Sources
(100KW to
1MW)

Sub-transmission
system
Distribution
substation
DSG

Threephase
Primary
feeders

Sectionalizing
switch

Battery or
Fuel cells,
1 to 25 MW

Capacitor
bank

One-phase
lateral feeder

Distribution
Transformer

DSG

Photovoltaic
Power supply,
up to 100 KW

Home

Voltage
Regulator


Function of Distribution Automation System

Remotely monitors the distribution system,
facilitates supervisory control of devices and
provides decision support tools to improve the
system performance
• SCADA
(Supervisory Control And Data Acquisition)

• Application Functions


SCADA

What ?
How ?
Why ?

SCADA


SCADA

How ?

SCADA


SCADA Features

Hardware Components
Software Components


SCADA – Hardware Components
A/D Converter
output

Transducer
output

Field Values

(011011110011) (Voltage : 10 V DC) (Voltage : 10 kV)


Remote Terminal Unit (RTU)

Pole Top RTU


Remote Terminal Unit (RTU)