TPP North EVN Bulgaria
Fact finding and repair of turbo generator №2
“Bright Engineering”Ltd successfully completed the contract for “Fact finding and repair of turbine №2” in TPP North EVN Bulgaria -Plovdiv.Turbine generator consists of a 30MW steam condensation turbine coupled with a generator produced by Skoda-First Brno plant back in 1972. For the purposes of successful and sustainable exploitation and ensuring uptake of peak loads in the winter period we had to make a full inspection of the turbine generator, along with previously specified peripheral systems and devices including evaluation of existing volumes of original spare parts. After specifying the necessary corrective actions were carried out the following activities:
- Recasting of all bearing of the turbo generator.
- Re surface of the horizontal joint of cylinders high and low pressure.
- Repair of the nozzle apparatus.
- Repair of control valves.
- Repair of the hulls of the turbine.
- Repair Rotors of High and low pressure.
- Check and correction of piping system live steam to TG2.
- Repair stator generator.
- Overhaul of the rotor of the generator including replacement of retaining rings.
- Repair of the rotor and stator excitation shaft.
- High speed Dynamic balance of all rotors including over speed test.
- Full Alignment of turbine shafts.
- Full Cleaning and rehabilitation of the entire control oil and lubricating system of turbine generator.
- Supply and installation of the system for vibro monitoring “Bentley Nevada”.
- Full Inspection and replacement of basic control and instrumentation equipment at Turbine 2.
- Full Electrical measurements and testing of electrical equipment, generator exciter, bus bars and more.
After eight months working full TG2 entered successfully into operation at the end of December 2013.