System Overview

The GE EX2100 Excitation Control System is an advanced static excitation system designed for synchronous generators. It provides precise excitation current control and fast field discharge using high-performance IGBT power devices, fully integrated with the GE Speedtronic Mark VIe control architecture.

Core Functions

Excitation current control:
Uses PWM (Pulse Width Modulation) DC output to accurately regulate excitation current, ensuring stable generator terminal voltage and reactive power control.

Field discharge protection:
IGBT power modules provide rapid excitation field discharge during faults, trips, or shutdown conditions to protect the generator and excitation winding from overvoltage damage.

Electrical Output Specifications

Maximum DC output voltage: 250 V DC

Continuous output current: 35 A DC

Peak output current: 52.5 A DC (10 seconds)

Input Power Supply

AC supply via rectifier

DC battery supply

Combined AC/DC supply configuration for enhanced reliability

Power Hardware Configuration

IGBT modules: 6 power modules

Responsible for PWM excitation output

Field discharge and protective energy dissipation

System Role and Application Scenarios
Excitation Control Core

The EX2100 acts as the core excitation controller for synchronous generators by implementing closed-loop PWM current regulation. It maintains stable generator voltage and reactive power output, making it suitable for:

Thermal power plants

Hydropower plants

Gas turbine power plants

The system is fully compatible with the GE Speedtronic Mark VIe control platform for seamless turbine–generator integration.

Safety and Protection

In the event of system faults, abnormal conditions, or emergency shutdowns, the IGBT discharge circuit is activated to rapidly de-energize the excitation field. This prevents excessive voltage buildup and protects both the generator rotor and excitation equipment, meeting power industry safety and protection requirements.

Redundancy and Availability

Simplex configuration:
Applied in small or less critical generating units.

Redundant configuration:
Used in large and critical power plants, incorporating:

ERRR redundant relay board

ERDD dynamic discharge board

This redundancy architecture improves system availability, fault tolerance, and operational reliability.

Typical Applications

Static excitation systems for synchronous generators

Power plants requiring high reliability and fast excitation response

Generator voltage and reactive power control systems integrated with GE turbine control solutions

GE IS200ERSCG1A｜Excitation Regulator Static Converter Board｜