UNITROL® excitation systems
Reliable excitation and synchronization systems that ensure stability, efficiency, and safety across power generation and industrial applications. Built on over 100 years of ABB expertise, UNITROL® delivers precise voltage regulation and grid stability worldwide.
Proven excitation technology, evolved for today’s energy challenge
Excitation systems are at the heart of safe and efficient power generation. UNITROL® solutions provide precise control of synchronous generators and motors, ensuring voltage stability, dynamic response, and compliance with the world’s most demanding grid codes.
From hydropower to co-generation and utility-scale power plants, ABB’s UNITROL® portfolio combines digital innovation, cybersecurity, and robust reliability to keep assets stable and compliant for decades.
Why choose UNITROL® excitation systems?
UNITROL® is trusted by utilities and industries worldwide for its proven reliability, long service life, and continuous innovation.
Proven reliability
MTBF > 35 years, validated under HALT & HASS testing.Cybersecure by design
IEC 62443 compliance and continuous updates.Experience & support
30,000+ installations, backed by ABB’s worldwide service networkBackward compatibility
Protects Investment with seamless upgrades.Grid code compliance
Meets standards and evolving regulatory requirementLife cycle services
Installation, training, excitation care and modernization.Where UNITROL® makes the difference
UNITROL® systems power stability across industries.
Thermal Power, Hydro Power, Renewable Energies, Utilities and Grid Operators, Marine, Process Industries
Insights & innovation in excitation expertise
Dive deeper into ABB’s world of excitation systems with exclusive video content. From cutting-edge research and testing methods to real-world applications in grid stability and compliance, these expert talks and behind-the-scenes features showcase how UNITROL® technology continues to evolve. Explore auto-tuning, digital innovation, and the people and centers of excellence driving reliable power for industries and communities worldwide.
Development and testing
Learn more about ABB’s development and testing of excitation technology. Watch now to discover the engineering excellence innovating the testing process to ensure that each excitation system leaves the factory ready to deliver reliable, high performance.
Optimized with AVR autotuning
ABB TechTalk — Optimized excitation control in the time of an espresso with AVR autotuning. What if you could compile a simulation model for grid code compliance in a matter of seconds, say, the time our favorite barista makes you an espresso? With the new UNITROL® 1000 autotuning capabilities, you can.
Grid stability in our everyday life
Making a world of difference: the role of grid stability in our everyday life. Contemporary life is full of comforts. Behind the scenes, energy fuels our daily lives. Have you ever wondered how we keep energy flowing without missing a beat? ABB plays an important role with its grid stability solutions, technologies and experts that make power generation plants react swiftly to any imbalance between demand and supply.
Find the right excitation solution for your plant
How to select a UNITROL® Excitation System
Selecting the correct excitation system depends on generator size, application and redundancy needs. ABB experts help customers match the right UNITROL® family to their requirements.