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Project: 2 x 500 MW CCPP – Full Automation & Asset Management

1. Facility & Process Overview

This project involves a new-build, 1000 MW (2 x 500 MW) Combined Cycle Power Plant (CCPP). The facility is a cogeneration plant, integrating high-efficiency power generation with water production.

  • Power Generation: The facility will consist of two (2) 500 MW power blocks. The plant’s core equipment includes:

    • Siemens SGT-4000F Gas Turbines

    • Siemens SST-8000H Steam Turbines

  • Water Production (Desalination): The plant will utilize extraction steam from the SST-8000H steam turbine to feed a Multi-Effect Distillation (MED) Desalination unit.

2. Project Scope of Work

This project will be executed as a full, turnkey E&C (Engineering, Procurement, and Construction) solution. The scope includes all project phases from conception to handover:

  • Pre-FEED & FEED (Front-End Engineering Design)

  • Detailed Engineering

  • Procurement & Supply

  • Erection & Commissioning (E&C)

3. Core Technical Domain

The scope is centered on the complete DCS (Distributed Control System), Advanced Motor Control, Automation, and Asset Condition Monitoring package for the entire facility. This provides an integrated solution for process control, energy optimization, and predictive maintenance.

4. VFD (Variable Frequency Drive) Application

A core component of the plant’s design for efficiency and precise control is the application of VFDs to major motor loads. This includes both Medium Voltage (MV) and Low Voltage (LV) drives.

  • Key Applications:

    • Boiler Feedwater Pumps (BFPs): (MV Drives) VFDs will be used for precise drum level control and process regulation, offering massive energy savings and reduced maintenance by replacing traditional, high-wear feedwater control valves.

    • Condensate Extraction Pumps (CEPs): (LV Drives) Used for precise hotwell level control, optimizing the steam cycle.

    • Cooling Water Pumps (CWPs) & Cooling Tower Fans: (MV/LV Drives) Allows cooling capacity to be precisely matched to plant load and ambient weather conditions, representing one of the largest energy-saving opportunities in the plant.

    • MED Desalination Pumps: (LV Drives) VFDs will control seawater intake and brine recirculation pumps, optimizing the desalination process.

    • Gas Turbine Static Frequency Converter (SFC): Integration with the SGT-4000F’s VFD-based SFC system for unit startup.

5. Condition Monitoring System (CMS)

A dedicated, plant-wide Condition Monitoring System (CMS) will be engineered and deployed for the proactive, predictive maintenance of all critical rotating equipment.

  • Monitored Assets: The CMS will acquire and analyze real-time health data from:

    • Gas Turbines (SGT-4000F) & Steam Turbines (SST-8000H)

    • Main Generators

    • High-Pressure Boiler Feedwater Pumps (BFP)

    • Condensate Extraction Pumps (CEP)

    • Critical MED Desalination Plant Pumps

  • Integration: The CMS will be fully integrated with the central WINCC SCADA system, providing operators with a unified view of both process control and machine health, including advanced asset management dashboards and predictive alarms.

6. Automation & Monitoring Architecture

The technical solution will be engineered using the Siemens TIA Portal platform to create a powerful and unified plant-wide control system.

  • Process Control Units: 19 x Siemens SIMATIC S7-1500 Series PLCs will be deployed for primary and distributed control.

  • System Reliability: High-availability, redundant CPU configurations will be implemented for all critical process areas (e.g., CCPP blocks, BOP) to ensure continuous operation.

  • Supervisory Control (HMI/SCADA): A facility-wide Siemens WINCC SCADA platform will be developed for all operational monitoring, alarming, and historical data logging.

  • Core Network Protocol: Profinet will serve as the high-speed, deterministic backbone for all communication between controllers, I/O, SCADA, the intelligent VFDs, and the CMS data acquisition units.