GE EX2100 Excitation Control System

Introduction

The GE EX2100 is an advanced excitation control system developed by General Electric for synchronous generators. Designed as part of GE’s digital control family, it integrates seamlessly with Mark VI and Mark VIe turbine control systems, offering high reliability, flexible configurations, and precise control of generator excitation. Its robust performance and diagnostic capabilities make it a global standard in power generation plants, utilities, and industrial facilities.

Applications

The GE EX2100 is engineered to support a wide range of generator excitation requirements:

• Gas turbine-driven generators

• Steam turbine-driven generators

• Hydro turbine applications

• Industrial co-generation plants

• Large utility power stations requiring strict grid code compliance

  

Core Features & Benefits

• High Reliability – Designed with redundant architecture to ensure continuous availability.

• Digital Regulation – Provides precise field voltage and current regulation for stable generator output.

• Scalability – Available in simplex and redundant configurations to suit plant requirements.

• Integrated Diagnostics – Continuous system monitoring for predictive maintenance.

• Flexible Interfaces – Seamlessly connects with DCS, turbine controllers, and plant monitoring systems.

• Grid Compliance – Meets IEEE, IEC, and NERC requirements for excitation and grid stability.

System Architecture

The EX2100 is built around modular components that simplify installation and service:

• Control Module – Executes digital control algorithms.

• Power Converter – Provides controlled DC output to the generator field.

• I/O Interface – Handles communication with plant systems and external controllers.

• Protection Functions – Includes over-excitation, under-excitation, and field ground protection.

  
  

Technical Highlights

• Excitation control range: Designed for large utility generators (up to hundreds of MVA)

• Configurations: Simplex, dual, or triple redundant

• Regulation modes: Automatic Voltage Regulation (AVR), Power Factor, and VAR control

• Communication: Supports Modbus, Ethernet, and GE Mark VI/VIe integration

• Advanced HMI: Provides operators with real-time control, monitoring, and diagnostics

Installation & Maintenance

The EX2100 system is typically installed within a generator control cubicle.

• Installation: Requires alignment with the generator’s field circuit and integration with plant protection systems.

• Maintenance: Minimal routine servicing; diagnostic tools help identify issues before failures occur. Hot-swappable modules reduce downtime during replacements.

  
  

Advantages in Power Generation

• Enhances generator stability during load variations and grid disturbances.

• Provides fast response excitation for system protection and fault recovery.

• Improves overall plant availability through advanced redundancy and monitoring.

• Reduces maintenance costs with predictive diagnostics and modular design.