Synchronous generators 1–65 MVA, 0.4–15 kV for diesel, gas-turbine and steam-turbine power stations

Description

Synchronous generators are medium- and high-power machines for diesel, gas-turbine and hydroelectric power stations, industrial energy centres and special applications. Generators are designed and tested at the rotating machines plant in Tapiószele (Hungary): production area 12,500 m², cranes up to 100 t, annual capacity 400 MW. In 2024 the plant launched the largest modernisation programme in its history, RM 2.0, costing 12 million euros, covering sheet blank preparation, CNC machining, coil manufacture, VPI impregnation and testing. The series range is 1000 kVA–50 MVA; the production programme gives 500 kW–65 MVA, voltage 0.4–15 kV and frequency 50/60 Hz, up to 200 Hz on request. Frame dimensions of series machines are 400–800 mm, for machines of higher power 900–1250 mm, and larger ones are made to an individual project. The electromagnetic calculation is optimised by the finite element method. Power and rotational speed are matched to the prime mover, the rated power factor is 0.8 (lagging), and the mechanical part is calculated for the active component of power. Voltage is regulated within ±5 % and maintained by an automatic voltage regulator (AVR) built into the generator or placed in a separate cabinet; excitation is brushless or static. Each machine undergoes an overspeed test at 1.2 times the rated speed for two minutes. Apart from standard generators, the company produces special machines: for 200 Hz, with a power factor of 0.1, with short-circuit current up to 100 kA, and also asynchronous generators. For nuclear power plants, synchronous diesel generators for emergency power supply of safety classes 2, 3 and 4 are supplied; for cooling towers, asynchronous generators that recover the energy of the air flow. All machines undergo individual acceptance tests; type and special tests are carried out according to the production schedule. The generators can be fitted with the Intelligent Solutions monitoring system (winding and bearing temperature, vibration, partial discharges). The company is a member of EASA and provides round-the-clock service.

Technical specifications