ABB UNITROL 5000 Voltage regulator

ABB UNITROL 5000 Voltage regulator

Product Overview

The ABB UNITROL 5000 is a microprocessor-based voltage regulator that utilises the latest available technology and incorporates ABB's more than 40 years of experience in semiconductor voltage regulators and 15 years of experience in the application of microprocessor technology. The system not only contains the core technology of the previous two generations of excitation regulators, such as UNITROL F and UNITROL P, but also absorbs the advanced research results and processes in the field of digital control, such as DSP digital signal processing technology, intelligent equalisation of silicon controlled rectifier bridges and so on.

Field of application

ABB UNITROL 5000 is mainly used for the excitation control of medium-sized and large synchronous motors for static excitation system (SES), which can be used for 50Hz, 60Hz or 16 2/3Hz power supply, with field currents ranging from 1,000ADC to more than 10,000ADC. In addition, it can be used in automatic voltage regulation systems (AVR) for exciters with special features, with supply frequencies from 16 2/3Hz to 400Hz.

Product features

Dual-channel system: The UNITROL 5000 uses a dual-channel system with a standby current regulator, which improves the reliability and stability of the system.

Digital Input Processing: The system is capable of three-phase voltage measurements and three-phase current measurements, and uses a signal processor to digitally process the input values, improving the accuracy and precision of the measurements.

Additional functionality: Additional inputs and outputs can be realised through software solutions alone, eliminating the need to add additional hardware and making it easy to scale up to the required number.

Power converter redundancy: Up to eight power converters can be connected in parallel and power converter redundancy is completely independent of the regulator, further increasing system reliability.

Remote monitoring: supports the most common protocols used in advanced control systems and allows the installation of a second control panel in the control room at a maximum distance of 100 m. ABB Service can also perform remote diagnostics via the Internet using the PC software ‘AVRview’.

Main functions

Control function:

Voltage regulator with adjustable PID controller (automatic mode) and excitation current regulator with adjustable PI controller (manual mode).

Reactive power sensing (regulation or compensation), under-excitation and over-excitation limiters.

Automatic mode and manual mode and auto-tracking function between channel 1 and channel 2.

Additional controllers to control generator power factor or transmission line power factor or reactive power.

Power system stabiliser (IEEE 2A, APSS, multi-band) and manual limiting function (optional).

Monitoring and protection functions:

Overcurrent protection, inverse time limit and instantaneous demagnetisation protection, over-excitation protection (volts/hertz relay).

Thyristor bridge temperature monitoring, individual thyristor conduction monitoring, rotating diode monitoring (optional, additional printed circuit board required).

Processor and software monitoring, integrated fault/alarm recorder, instantaneous recorder function.

Market Impact

Since its introduction to the market, the ABB UNITROL 5000 excitation system has been widely used around the world. In recent years, the original or assembled excitation system has been gradually adopted by many large and medium-sized water and thermal power plant users in China, and has been highly praised for its high performance, high reliability and easy maintenance.

Summary

ABB UNITROL 5000 is a powerful, excellent performance excitation system with high accuracy, high reliability, easy maintenance and expansion. It is suitable for the excitation control of various medium-sized and large synchronous motors, and can be flexibly configured and customised according to user requirements. For more information or technical support, we recommend visiting ABB's official website or contacting their customer service department.