TANDA TPP STAGE– II (2x660MW)

Station Control & Instrumentation (C&I) Package

Salient Technical Features

The Station Control & Instrumentation (C&I) and Instrumentation Package is intended for the procurement of the equipment and systems for the control, protection, operation and monitoring of the total plant, except a few areas along with other sub- systems for other functions.

The control system, called Distributed Digital Control Monitoring & Information system (DDCMIS) is envisaged for control and operation of

Modulating controls of the Steam Generator (SG) {Combustion Control- Fuel Flow/Air Flow; Furnace Draft Control, etc.}

Modulating controls of Feedwater & Condensate Cycle {Hotwell level control, Deaerator Level control, Heater Level Control, etc.}

Binary control of auxiliaries of Steam Generator (SG) {Forced draft (FD) fan, Induced Draft (ID) Fan, Primary Air (PA) Fan etc.}

Binary control of auxiliaries of Turbine Generator (TG) {Boiler Feed Pump (BFP), Condensate Extraction Pump (CEP) etc.}

Electrical Breaker including synchronization circuits

Coal Handling Plant

Water System (PT Plant, DM Plant, Cooling Tower etc.)

CW System

Air Conditioning and Ventilation systems

Ash Handling Plant

Make-up water system

(The integral control & protection of boiler and turbine and some off-site plants like Hydrogen Generation, Fire Fighting System etc. are part of other packages, hence not included in the DDCMIS system of this package)

Human Machine Interface & Plant Information System (HMIPIS) is based on Large Video Screen (LVS) displays supported by TFT monitor based Operator Work Stations (OWS). These devices through customized user-friendly displays, soft alarm facia and pop-up displays are used for giving fast pin-pointed faults/ status to the operator. Local ON/OFF operation of equipments is envisaged through Graphical Interface Unit (GIU). The total system is networked through a Station-Wide LAN for use of real time data of various plant areas by other users like maintenance, planning, efficiency enhancement groups etc.

The sequence of events recording & alarm annunciation are also implemented as a part of DDCMIS system. A GPS based master and slave clock system is provided for uniform and synchronized timing signals through out the entire station.

The power supply for the control system is based on 24V DC provided through microprocessor based modular charger system and for the peripherals and other subsystem through 230V Single Phase UPS.

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An on-line Steam & Water analysis system (SWAS), PA system, Operator control desks, panels, Instrumentation, Communication, Control & Power Cables for system interconnection are included in this package.

Field instruments like pressure, DP, flow & level transmitter, analyzers along with their process connection & piping as well as measurement systems like Vibration Monitoring System and Continuous Emission Monitoring System (CEMS) etc. are procured through this package. A plant-wide CCTV system based on IP technology is included in this package for security, surveillance as well as for aid to the operation.

Through this package AMC after warranty period shall also be provided for DDCMIS, CEMS, PA System and CCTV.

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