Technical feasibility

PART a: IDENTIFICATION OF R&D Result

PARTEA A: Identificarea rezultatului cercetării-deZvoltării (CD)

·         The project team

             Echipa proiectului

Advisor’s Name:Nume: Department for Technologies and MaterialsProject: Earthquake analysis of the SF6 circuit breaker used in power centrals
Phone:Telefon:  +40.723.163396
E-mail: dumitrudc10@yahoo.com 
Expecting date of valorization plan submission:Data aşteptată pentru trimiterea planului de valorizare  20.02.2012

·         Identification of R&D activity

Identificarea activităţii de cercetare-dezvoltare (CD)

Acronym:Acronim: DTM

Author of the R&D result:Autorul rezultatului CD:  Dr. Eng. Negru Mihai
Company or University:Companie sau Universitate:  UNIVERSITY OF  CRAIOVA, ROMANIA 
Phone:Telefon:  + 40 723 693178
E-mail: negrumih@yahoo.com
Sector:Domeniu:  ENG – Engineering
Type of the R&D result:Tipul rezultatului CD:   Earthquake Simulation

PART B: VALORISATION PLAN

Partea B: Planul de valorizare

SECTION I: Testing

SECŢIUNEA I: Testarea/încercarea

 

1

Has the R & D result been tested?A fost testat/încercat rezultatul CD?

YES

Da

NO

Nu

NO

 

The following question is replied according to the reply in question 1

Următoarea întrebare este formulată în legătură cu răspunsul la întrebarea 1

 

If yes

Dacă răspunsul a fost DA:

 

1a

In what mode has the result been tested?•           Prototype

•           Pilot Application

•           Alpha/BETA testing

În ce mod a fost testat/încercat rezultatul?

•           Prototip

•           Aplicaţie Pilot

•           Incercare Alpha/BETA

 
1b. Please describe and discuss the testing resultsVa rugăm să descrieţi rezultatele testate/încercate

 

If no:

Dacă răspunsul a fost NU:

1c

Describe what type of testing does the R&D result need?Descrieţi ce tip de testare/încercare necesită rezultatul CD?
Detailed commentComentariu detaliat

 

For a complete test of the seismic capability it is necessary to perform an experimental study combined with a numerical simulation because the experiment is expensive and not so flexible regarding the simulation of all types of limit conditions of earthquakes. The numerical simulation of the seism is made using FEM and ANSYS program which permit to perform a spectrum analysis on the FEM model of the circuit breaker.

 

The seism simulation using FEM is a two step analysis. First we have made a modal analysis of the SF6 circuit breaker FEM model and we have compared the results with the experiment in order to validate the FEM model. Then it must be done the spectrum analysis on the validated FEM model for different seism types.

 

1d. What is the time needed for testing?Care este perioada de timp necesară testări?
Time for testing, probing and homologation is estimated to be within 30 working days.
1e. What is the cost needed for testing?Care este costul necesar pentru testare?
Research costs are estimated at Euro 1800. Costs related to testing, probing and homologation of functional model are estimated to be 1000 Euro.

SECTION 2: Current Stage of Development

SECŢIUNEA 2: Stadiul actual de dezvoltare

 

2a

To what extent does the development team have technical resources for supporting the production of a new product? (Researchers, human resources, hardware, etc. )În ce măsură dispune echipa de resursele necesare pentru a asigura fabricarea noului produs? (Cercetători, resurse umane, hardware, etc.)
University of Craiova, a higher education institution with a specific structure of education, has managerial experience in scientific research performance, both fundamental and applied research in all areas, as well as advice and expertise.Research and development team has the human resources for the result Earthquake analysis of the SF6 circuit breaker used in power centrals. The research result is the outcome of research and experimentation activities conducted by a team of experts who want to further optimize these results.
In this respect, the team of experts is available for technical advice, so that potential partners can begin assimilating these results.

 

2b

What are the technical issues that need to be tackled for full deployment, if needed?Care sunt aspectele tehnice ce trebuie abordate pentru lansarea în fabricaţie, dacă sunt necesare?
A spectrum analysis is one in which the results of a modal analysis are used with a known spectrum to calculate displacements and stresses in the model.

 

The FEM spectrum analysis was performed on the validated FEM model of the SF6 circuit breaker. The following results were obtained for three type of earthquake:

-          earthquake type AF2  (<5.5 degrees Richter)

-          earthquake type AF3 (5.5…7 degrees Richter)

-          earthquake type AF5 (> 7 degrees Richter)

 

2c

What additional technical resources are needed for the production of this new product?Ce resurse tehnice suplimentare sunt necesare pentru fabricarea acestui nou produs?
The design of the circuit breaker structure must include the simulations of the earthquakes, made by experiments and by Finite Elements Methods programs. The challenge is to determine the behaviour of the SF6 circuit breaker during three types of earthquake using ANSYS program and some FEM models validated with experimental results in modal analysis.

 

To this aim, there are conditions required, such as:
- Seismic loads,
- Reliability.
To fulfill these conditions further research is needed by companies specialized in the field.

 

 

2d

Overall assessment of the current stage of technical development.Evaluarea generală a stadiului actual de dezvoltare tehnică
Detailed commentComentariu detaliat

 

The practice along the last decades in designing structures to seismic action, devoted transition from “earthquake-resistant structures” towards “structural performance in earthquakes.”

Structural safety will not increase as a direct result of increased capacity and similarly the level of structural damage will be not automatically reduced.

 

The level of structural damage can be better controlled through accurately improved estimate of the level of post-elastic deformation of structural elements (displacement controlled analysis) than the exclusive control of level of unitary/sectional efforts (controlled by forces analysis).

 

SECTION 3: Deployment

SECŢIUNEA 3: Lansarea în fabricaţie

3a

Define the demands for large scale production in terms ofDefiniţi cererea pentru producţia de masă în funcţie de:
  • Materials
  • Materiale
Procurement of materials and components for conducting seismic analysis of SF6 circuit breaker used in power shall be done from specialized companies.

 

  • technologies, tools, machineries
  • Tehnologii, utilaje, maşini
The numerical simulation of the seism is made using FEM and ANSYS program which permit to perform a spectrum analysis on the FEM model of the circuit breaker.

 

The seism simulation using FEM is a two step analysis. First we have made a modal analysis of the SF6 circuit breaker FEM model and we have compared the results with the experiment in order to validate the FEM model.

Then it must be done the spectrum analysis on the validated FEM model for different seism types.

 

 

  • Staff effort
  • Resurse umane
 The estimated human resource requirements for assimilating the new installation model will be:
- Staff to survey the market,
- Staff for investment,
- Staff for training of operators and
- Staff for activities of advertising, publicity and expertise. 

SECTION 4: Overall Assessment

SECŢIUNEA 4: Evaluare generală

1

What is you overall assessment of the technical feasibility of the research result?Care este evaluarea generală a fezabilităţii tehnice pentru rezultatul CD?
The results of this research study are the final step of the entire process of earthquake simulation and consist in determination of displacements and stresses values achieved during three types of earthquake (AF2, AF3, AF5).

 

Analyzing the computed values we can see that in the case of the circuit breaker the most vulnerable parts are the isolator columns made by ceramics for which the admissible stress is  s = 40 MPa.

 

During earthquake type AF2 the stress value over the isolator parts are smaller then 40 MPa, so all three poles (A, B and C) stand out to a AF2 seism.

 

By comparing with the value of 40,3 MPa determined by FEA for the lower part of the isolator column of the pole “C” it can be considered that the pole “C” stand out to a seism type AF3 corresponding to a 7 degrees seism on Richter scale. Similar conclusions can  be made for pole “A”. Some problems are with the pole “B”, because of the rigid connections with poles “A” and “C” and looseness of the shrinkages.

 

For seism type AF5 the stresses obtained are superior to the admissible value of the stress for ceramics material so, the base isolator of the pole C and B will collapse. The conclusion is that the resistance structure of the SF6 circuit breaker is not performing well during AF5 seism, and is necessary to optimize the structure. The optimization can be done using the Finite Element model used in this study.

 

The project can be considered as one with minimum technical risk.

 

 

 

KEYWORDS QUANTITATIVE ASSESSMENT (0-5).

Evaluare cantitativă (0-5)

 

Please put X as appropriate.

Vă rugăm să marcaţi cu X  punctajul considerat corespunzător

 

1 2 3 4 5
Adequacy of testing activity undertaken so farGradul de adecvare al activităţii de testare desfăşurate pănă în prezent X
Adequacy and availability of technical resources of the development teamGradul de adecvare şi disponibilitatea resurselor tehnice ale echipei X
Current development stageStadiul actual de dezvoltare X
Overall technical feasibilityFezabilitatea tehnică generală X

 

 

We agree that all informations contained in this form to be made public in the project „Inter-regional cooperation for valorization of research results – INTERVALUE”, by publication on the project website: http://www.urenio.org/intervalue/.

Suntem de acord ca informaţiile cuprinse în acest formular să fie făcute publice în cadrul proiectului „Inter-regional cooperation for valorization of research results – INTERVALUE”, prin publicarea lor pe site-ul proiectului, la adresa: http://www.urenio.org/intervalue/.

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