scada ppt

ASeminar

OnSCADA for Thermal power plant

Submitted by : Chaitanya.k.Jambotkar

Under the guidance of : Prof.Vinoda.s

Contents

• Overview of Thermal power plant• Necessity of SCADA in Thermal power plant • What is SCADA ?• How does it work ?• SCADA implementation in Thermal power plant • Conclusion • References

Overview of Thermal power plant

The general layout of thermal power plant consists of mainly four circuits, they are as below:

1. Coal and Ash circuit

2. Air and Gas circuit

3. Feed Water and Steam circuit

4. Cooling Water circuit

Block diagram of Thermal power plant

Distributed control system

• DCS is process state driven.

• Parallel ladder logic was its base.

• Confined to certain area.

• Operator has to make a request directly to

field I/O and get the response.

Drawbacks of DCS

• DCS was unable to provide information of the

run time process instantaneously and

continuously.

• Applicable only for short distance.

• Maintenance cost was more.

• DCS was less automated.

Why SCADA only ?

• The Ability to control the process from a remote place.

• The Ability to create logs and reports about system’s current and past state.

• The Ability to send necessary information to Engineers and operators in real-time.

What is SCADA ?

• SCADA is acronym for “Supervisory

Control And Data Acquisition”.

• SCADA is not just a hardware, neither a

software. It is a system as a combination of

special hardware, software and protocols.

Important terminologies in SCADASCADA Hardware- Field level instrumentation and control

devices

- Remote Terminal Units (RTUs)

- Master Terminal Unit or MTU (Also called The Master Station)

- Communication System

SCADA software

•Data Acquisition and Processing•Control•Man machine interface•Alarm handling•Logging and Archiving

How SCADA works ?

The measurement and control system of SCADA

has one master terminal unit (MTU) which could

be called the brain of the system and one or more

remote terminal units (RTU). The RTUs gather

the data locally and send them to the MTU

which then issues suitable commands to be

executed on site. A system of either standard or

customized software is used to collate, interpret

and manage the data.

Overview of SCADA system

SCADA implementation on Thermal power plant

SCADA implementation on Thermal power plant

supervision and control

• Fuel• Boiler• Turbine• Generator

Thermal power plant control room before implementation of SCADA

Thermal power plant control room after implementation of SCADA

HMI and SCADA system results on VB screen

Conclusion • The SCADA for thermal power plant allows the

owner of the plant not only to control and supervise the plant which is its features but also allows to operates the plant in the economical way.

• SCADA for thermal power plant overrides all the drawbacks of the conventional DCS based thermal power plant. It does not entertain more manual operations instead operates automatically hence overriding the human errors and minimizing the errors in the power plant operation.

References

• SCADA System by Allen Bradley • Baily D, Wright E (2003). Practical

SCADA for Industry. Elsevier.• The Energy and Resource Institute -

Paper on "Technology status of thermal

power plants in India and opportunities in renovation and modernization".

Thank you

QUESTIONS?