NTPC LIMITED
PROJECT : BARETHI STPP-I (4x660 MW)
PACKAGE NAME : BALANCE OF PLANT (BOP) TURNKEY PACKAGE
---------------------------------------------------------------------------------------------------------------------
“Salient Technical Features of the equipment/systems/services covered in IFB No. CS-9579-001C-2 dated 05.02.2015, Bidding Document No. CS-9579-001C-2 are mentioned below. These Salient Technical Features are mentioned only to facilitate the prospective bidders to prima-facie understand the requirements under the tender and shall not in any way limit or alter the scope of work and technical features/specification of equipment/ systems/ services covered in the Bidding Documents. Detailed provisions in regard of scope of work and technical features/ specification of equipment/ systems/ services, contained in the Bidding Documents shall be final and binding.”
SALIENT TECHNICAL FEATURES
1.00.00 Coal Handling Plant
Coal Handling Plant shall be designed based on specified Indian Coals. The plant shall also be designed for blending of imported coal and Indian coal in the proportion 30:70 by weight. Rated capacity of CHP shall be as specified in the technical Specification.
The design capacity of the conveyors shall be 110% of the rated capacity.
Wagon tippler shall be side-discharge type (Rotaside) and shall conform to RDSO G-33 Rev. 1.
2.00.00 CW Pumps, Cooling towers and Make up water system
CW equipment & Systems, Cooling towers and make up water system shall be provided as per the scope of technical specifications.
3.00.00 Fire protection system, Air compressors, AC and ventilation system, H2 generation system shall be as per the scope of technical specification.
4.00.00 WATER TREATMENT SYSTEM
Water treatment system covers pre-treatment, chlorination, Liquid Effluent Treatment, De-mineralization system & condensate polishing system
5.00.00 Electrical Systems
The electrical items shall cover following:
· Motors, Electric Actuators
· MV Switchgears, LV Switchgears and LV Busducts, Numerical Relay Networking, DC System, Battery and Battery Charger
· HT Power Cables, LT Power and Control Cables, Cabling, Earthing and Lightning Protection, Lighting, DG Sets
· Control & Protection of EHV system and Generator Relay Panels, Substation Automation System (SAS) based on IEC 61850 protocols.
· Construction Power facilities
· Complete Electricals for Offsite Areas, 66 kV Lines etc.
· Type Testing and Mandatory Spares as specified.
6.00.00 C & I Systems
The control system, called Distributed Digital Control Monitoring & Information system (DDCMIS) is envisaged to be procured under this package for control and operation of
Ø Coal Handling Plant.
Ø Water System (PT Plant, DM Plant, Cooling Tower etc.).
Ø CW System.
Ø Air Conditioning and Ventilation systems.
Ø Make-up water System.
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 to be provided for uniform and synchronized timing signals throughout 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.
Main Equipment related instruments like Flame Monitoring system, Coal Bunker Level measurement system, gravimetric feeder control system, Acoustic Pyrometer, Acoustic Steam Leak detection system, Furnace and Flame viewing system, Turbine stress control / evaluation system, Turbine supervisory and diagnostic system etc are also procured through 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 etc are also procured through this package.
A plant-wide CCTV system based on IP technology is included in this package for surveillance of plant equipment as an aid to the operation.
Apart from above, an on-line Steam & Water analysis system (SWAS), PA system, Operator control desks, panels, shielded twisted pair cables as well as optical fiber cables for system interconnection and all types of Instrumentation Cables are also included in this package.
7.00.00 Civil Works
The site for offsite areas comprises of layers of silty clay / clayey silt and sand/weathered rock layer at deeper depths. Open foundation and pile foundation are envisaged for major structures. The steel structures shall be pre-fabricated in factory and shall have bolted field connections (except chimney flue liners, coal bunkers & ducts which may be fabricated and welded at site).
8.00.00 SOLAR P.V Plants
Solar Photo-voltaic plants to be supplied under the package shall be grid-connected rooftop SPV plants including all auxiliaries. The SPV modules must conform to latest edition of IEC 61215 / IS 14286 for crystalline silicon Terrestrial PV Modules design qualification and type approval. In addition, the modules must also conform to IEC 61730 part 1 & Part 2 or equivalent IS for construction & testing requirements respectively.