IAEC-1000
Excitation System

A fully digital microcomputer-based excitation system for generator units below 10 MW, featuring an integrated single-cabinet design for regulation, power, and de-excitation functions. Designed for reliable operation, easy maintenance, and flexible application in small hydropower and thermal power plants.

NSD Electric IAEC-1000 compact excitation system for small hydropower units

Overview

The IAEC-1000 is a fully digital microcomputer-based excitation system developed by NSD Electric for generator units below 10 MW. It features an integrated single-cabinet design combining regulation, power, and de-excitation functions, with a standardized and modular structure for small hydropower and thermal power generator units.

NSD Electric IAEC-1000 compact excitation system for small hydropower units

Features

1. 32-bit multi-core high-speed processor up to 600 MHz
2. Integrated structure with modular installation for easy disassembly and maintenance
3. Supports three excitation start-up methods, four operating modes, and five protection limit functions
4. Built-in IEC 61850 communication protocol
5. IEC 61131-3 compliant graphical programming, supporting FBD, LD, IL, ST, SFC, and C language

6. Optional wired or wireless remote real-time diagnosis and maintenance

System topology diagram showing the governor main board, power cabinets, de-excitation unit, control terminal, and electrical and ethernet connections.

Key Configuration

1. Two sets of 32-bit industrial-grade controllers
2. Chinese touchscreen HMI
3. One set of 600 A three-phase fully controlled rectifier bridge; two sets optional
4. One set of 630 A de-excitation switch with linear resistor; non-linear resistor optional

Industrial control terminal interface with monitoring graph, system parameters, status values, and operation buttons.