TX-NLCH four-pole turbogenerators for nuclear power plants up to 1,700 MVA
TX-NLCH is a four-pole turbogenerator for nuclear power plants rated up to 1,700 MVA with voltage up to 30 kV. The stator winding is water-cooled, the rotor and core are hydrogen-cooled. The generator works with the slow-speed turbines of nuclear plants, including the TX-10 series.
- Type
- 4-pole turbogenerator, 50/60 Hz (1,500/1,800 rpm)
- Output
- up to 1,700 MVA
- Voltage
- up to 30 kV
- Power factor
- 0.85 or 0.9
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
The TX-NLCH generator was developed from the two-pole TX-LCH machine for thermal power plants. Four poles are needed for the slow-speed turbines of nuclear plants, which rotate at 1,500 rpm in 50 Hz grids or 1,800 rpm in 60 Hz grids. The stator winding is cooled by water, while the rotor and stator core are cooled by hydrogen.
Stator voltage is up to 30 kV, power factor 0.85 or 0.9, efficiency up to 99.0% and rating up to 1,700 MVA. The generator is compatible with thyristor and brushless excitation, and for the brushless variant the exciter verification has already been successfully completed. The stator design is developed with numerical methods, namely stress analysis of the frame, CFD modeling of the cooling flows and magnetic flux analysis in the end zone.
Machines with thyristor excitation have been supplied to many nuclear plants in Japan and abroad. In 2012 the manufacturer shipped a 4P-60 Hz generator of 1,389 MVA (1,250 MW) for the Vogtle plant in the USA, and in 2013 a 4P-50 Hz generator of 1,690 MVA (1,521 MW) for the Barakah plant in the UAE. Both machines have entered commercial operation. The company has supplied the main equipment of the nuclear and turbine islands for over 20 nuclear plants in Japan and over 30 in the USA and Europe.
The generator is designed for nuclear units with BWR and PWR reactors rated 1,000-1,600 MW. It is also used to replace generators during nuclear plant life extension. The turbogenerators are built at the plant in Yokohama, and the stator winding bars are made there under a step-by-step quality control system. The generator is supplied together with a TX series steam turbine, including TX-10, the D-AVR digital excitation regulator and the D-EHC turbine control system.
Technical specifications
| Type | 4-pole turbogenerator, 50/60 Hz (1,500/1,800 rpm) |
|---|---|
| Output | up to 1,700 MVA |
| Voltage | up to 30 kV |
| Power factor | 0.85 or 0.9 |
| Efficiency | up to 99.0% |
| Cooling | stator winding - water; rotor and core - hydrogen |
| Excitation | thyristor or brushless |
Request a price and lead time
TX-NLCH four-pole turbogenerators for nuclear power plants up to 1,700 MVA. We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
Customs codes
| UKTZED (Ukraine) | 8501 64 00 00 |
|---|---|
| HS, 6 digits | 8501 64 |
| CN (EU) | 8501 64 00 |
| HTSUS (USA) | 8501 64 00 00 |
| China customs tariff | 8501 64 10 00 8501 64 20 00 |
Codes are for reference: the final code is determined at declaration for the specific model.
Questions and answers
What rotational speed is TX-NLCH designed for?
1,500 rpm for a 50 Hz grid or 1,800 rpm for 60 Hz, to suit the slow-speed turbines of nuclear plants, including TX-10.
What are the largest TX-NLCH machines supplied so far?
A 4P-50 Hz generator of 1,690 MVA (1,521 MW) for the Barakah plant in 2013 and a 4P-60 Hz generator of 1,389 MVA (1,250 MW) for the Vogtle plant in 2012.
Which units is the generator suitable for?
For nuclear units with BWR and PWR reactors rated 1,000-1,600 MW. Generator rating is up to 1,700 MVA at voltage up to 30 kV.
Similar equipment from other manufacturers
