Rotor Wireless Measurement System

Project background

After more than 30 years in operation, the power plant was comprehensively modernized, gaining two new Kaplan bulb turbines as well as generators optimized for performance. Austrian electricity operator, VERBUND, has invested more than 20 million euros in the modernization. The new turbines and generators increased the electricity generated by a formidable 20 percent without undertaking any changes to the outside of the facility or in the reservoir area.

Why this solution

As a part of the modernization, a specific focus was placed on the elimination of rotor failures that have occurred before. The rotor of a new turbine alone weighs 15 tons and has a diameter of just under 4 meters. The decision was made to install a system that could without too much interference measure excitation values. This specific solution can measure the parameters that normally can’t be measured, such as the excitation of the big generators. The solution is also modular, which means it can be expanded to measure temperature, vibrations, magnetic field, air gap, etc.

Benefits and results for the client

A wireless solution was presented and completely fulfilled its purpose. The installed system measures excitation current and voltage while the power is supplied from the excitation using converter. This enables a stabile flow of measurements that can be accessed from the operator panel. Using devices that are installed on rotor and stator, the system starts automatically when it is connected to a power supply. This makes it ideal for operations with multiple starts and where time needs to be saved.

Weinzödl / Austria

54 MW

of installed capacity

20 mil. €

value of last modernization

22,000

households powered

1982

commission year