Improvement of electric hydro-generator with a view to increasing the energy efficiency


Contract: PNCDI2 21028/1//15.10.2007
Contracting authority : National Management Center for Programs, Innovation and Technology Transfer – Politehnica Bucharest
Contractor: Research Development and Testing National Institute for electrical engineering -
ICMET Craiova
Project Manager: Dr. eng. Victor PROCA
Project class : Complex Research-Development Projects
Project type: PC
Project acronym: GENERO

Period of project development: 18.09.2007- 18.12.2009
Project total value: 757000 lei from which
- State budget: 757000 lei
- Co-financing: 0 lei
Partners involved in the project:
Project leader/Partner 1: Research, Development and Testing National Institute for Electrical Engineering–ICMET Craiova
Project manager: dr. eng. Victor PROCA
Partner 2: Romanian Academy - Timisoara subsidiary
Project responsible: Academician Toma DORDEA
Partner 3: Politehnica University - Timisoara
Project responsible: Prof. Dr. eng. Marius BIRIESCU

Energy efficiency increase
Clean energy
Environment and health
Preservation and sustainable management of natural and artificial resources
Technological platform: Hydro energy

The main objective of the project is: increase of energy efficiency of electric hydro-generators, which at present are the most important source of clean energy at worldwide level.
The research proposal is characterized by its actuality and importance as regards energy generation with increased efficiency, complying with the principle of sustainable development.
The project is aimed at the improvement of stator winding structure, i.e. of bunched bars made of elementary conductors, by minimizing the additional losses in the hydro-generator stator winding.
Strategic objectives
-Drawing up of a method for improving the Roebel-type bar structures, used for designing the induced windings of high power synchronous generators
-Drawing up of a program for Roebel-type bar calculation and improvement
-Achievement of an experimental model with Roebel bar at 1:1 scale, for validating the calculation expressions proposed and used in the improving algorithm

Project finalizing way:
Achievement of experimental model, experiments on model and demonstration of the achieved model functionality.
Schedule for project achievement/Time table:
2007 –Stage I/
Analysis of the solutions for increasing the electric hydro-generator performances
Period: 18.09.2007 - 15.12.2007
Total value of the stage: 100000 lei
2007- Stage II/ Achievement of the execution documentation for the experimental model
Period: 15.12.2007– 15.06.2008
Total value of the stage: 100000 lei
2007 – Stage III/Achievement of the experimental model
Period: 15.06.2008 – 15.12.2008
Total value of the stage: 173000 lei
2008 – Stage IV/ Experimental studies on the achieved model
Period: 15.12.2008 – 15.06.2009
Total value of the stage: 334000 lei
2008 – Stage V/ Demonstration of the achieved model functionality
Period: 15.06.2009 - 15.12.2009
Total value of the stage: 50000 lei

Potential users:
-producers of electric energy, which use hydro energy sources.
Technical, economic and social impact:
The project topics belong to an important field, both on national and European plan: clean energy – hydro- energy. It should be emphasized that Romania has been the only country from the South East Europe which designed and achieved hydro-generators according to its own conception. The only designer and manufacturer of synchronous hydro-generators in the country is the Machine Building Works from Resita. This company has manufactured almost all the hydro-generators in operation nowadays in the country. At present, the 125 large hydropower plants from Romania, the 223 micro-hydropower plants respectively, have entered or will enter into a rehabilitation process. Those involved in this process should re-analyze the designs of the old electric hydro-generators and find solution adequate for increasing the technical performances by applying some new methods of designing/improvement and by using some modern manufacturing technologies. Thus, a significant impact of the research results foreseen in the proposed project is expected, referring to the following aspects:

a) Technological transfer of the got results to the hydro-generator manufacturers, to the hydro-arrangements in course of achievement or in rehabilitation process inclusively;

b) Increase of efficiency in electric energy generation by non-polluting sources (hydro-energy), development of applications in the field of hydro-arrangements, of medium and low power arrangements inclusively, which could be achieved in the near future.

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