ABB UNITROL ® High end excitation control system for 6000 synchronous generators/motors

Product Overview

UNITROL ®  6000 is ABB’s flagship excitation system, providing reliable excitation control for synchronous generators and synchronous motors. It is an industry benchmark in the field of power generation, with core values of high availability, strong control performance, grid compliance, and easy operation and maintenance.

Product version and power range

UNITROL ®  6000 is divided into Medium and X-power according to power, covering excitation currents of 20A to 12000A.

Model Excitation Current Applicable Scenarios Core Configuration

UNITROL 6000 Medium ＜ 1800A Hydroelectric, pumped storage, combined cycle, brushless turbine single/dual channel, up to 3 rectifiers D1–D5

UNITROL 6000 X-power 1800A-12000A nuclear power, large hydropower, gas turbine, coal-fired single/dual channel, up to 8 rectifiers, H-bridge, D5/UNL series

Core control function

Closed-loop regulation

Automatic mode: Voltage regulator with PID filtering

Manual mode: Excitation current regulator with PI filtering

Reactive/active current droop compensation, power factor control

security restrictions

Maximum/minimum excitation current limit

Stator current limit (adjusted with cooling temperature)

P/Q under excitation limit, V/Hz limit

Manual mode safety constraints

Power System Stabilizer (PSS)

Supports IEEE 421.5-2016: PSS 2A/2B/2C/4B/4C

Optional ABB adaptive APSS, suitable for weak current networks

Protection and monitoring

Level 3 actions: alarm, redundant switching, emergency trip

Overcurrent V/Hz、 Monitoring of demagnetization, rotor temperature, and thyristor conductivity

Recording and synchronization

Event record: 2000 time stamped events

High speed waveform recording: automatic triggering of faults

Time synchronization: SNTP, accuracy 1ms

Hardware core components

controller

Platform: AC 800PEC (800xA extension)

Speed: Fast I/O 400 µ s, pulse control 25ns

Power rectifier

D1-D5: AC power supply up to 1080V, frequency 50-480Hz

UNL14300: AC power supply up to 1500V, insulation withstand voltage 7.5kV

human-machine interface

ECT excitation control terminal: industrial touch PC, Windows 10, independent operation

communication

Standard configuration: Modbus RTU/TCP, Profibus DP V0

Optional/Standard: IEC 61850

Simulation and Debugging

SMDS-RT 6000: Hardware in the Loop Real time Simulator, simulates units/power grids, shortens debugging, reduces costs, and supports training.

Application scenarios

Generator: thermal power, hydropower, nuclear power, gas turbine, emergency diesel unit

Synchronous motors: steel mills, papermaking, chemical industry, natural gas, refining

Service and Support

Full lifecycle management: Active/Classical/Limited/Obsolete four stages

24/7/365 global technical support, remote RAP platform access

Installation and debugging, customized training, upgrading and renovation, spare parts

Excitation Care Service Package: Predictive Maintenance, Remote Diagnosis, Knowledge Transfer

Key questions and answers

UNITROL ®  What are the power ranges and core differences between the two versions of 6000?

Answer: Medium is less than 1800A, targeting small and medium-sized units, with a maximum of 3 rectifiers, supporting PSS 2B/2C; The X-power ranges from 1800A to 12000A and is designed for large/nuclear power units. It can accommodate up to 8 rectifiers and H-bridges, supports PSS 4B and APSS, and comes standard with IEC 61850.

UNITROL ®  What are the control core hardware and key performance indicators for 6000?

Answer: The hardware core is the AC 800PEC controller, with a fast I/O cycle of 400 µ s and a pulse control cycle of 25ns. The excitation current covers 20A to 12000A, with a time synchronization accuracy of 1ms, and can store 2000 time stamp events.

UNITROL ®  How can 6000 meet the requirements of power grid standards and on-site debugging?

Answer: Built in multiple types of PSS and limiters, supporting full grid specifications; Paired with SMDS-RT 6000 hardware in the loop simulation, it can pre tune parameters and simulate extreme working conditions; Equipped with a white noise generator and high-speed waveform recording, it can quickly complete grid compliance testing.