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The paper presents modeling and simulation programme of the synchronize conditions for synchronous generator in the thermal power plants. The programme is utilized for educational purposes in the laboratory “Electrical Section of Power Plants” for the conditions study and the practical skill moulding to the thermal power units interconnected. Are studied the synchronize conditions and the admissible...
Demand for useful heat it is the essential condition in the qualification of electricity production in high efficiency cogeneration. A solution to provide the demand for useful heat and compensation of load variations over time it is the storage of thermal energy. The paper presents the technical and economic analysis of the heat storage systems use for a cogeneration unit with ORC technology and...
In case of the combined heat and power plants, heat supplied to consumers it has a decisive influence to qualified of electricity generated in high efficiency cogeneration. The paper present the options for determining the amount of useful heat delivered to consumers considering the specific operating conditions of the cogeneration unit with ORC technology and biomass fuel.
Use of renewable energy sources is promoted across European Union by support schemes that are applied in order to achieve energy policy goals of sustainability, security of supply and improved competitiveness. The paper presents in a synthetic manner the evolution of the support scheme of quota obligation system with tradable green certificates in Romania. Also, it is analyzed the profitability of...
The Municipal Solid Waste (MSW) from the household, commercial or industrial represent materials with significant energy value. The directives of European Union (EU) discourage landfilling of waste and promotes their recycling and recovery. Until the present, in Romania there are no plants in operation for the municipal waste incineration. The municipal waste disposal is carried out solely through...
This paper identifies several directions to improve the performances of the operating mechanism for medium voltage circuit breakers in order to get variable moving characteristics of the moving contact adjusted to the value of the switching current. Different drive solutions currently used in the operation of vacuum circuit breakers and SF6 were analyzed comparatively, as well as the performances...
In the present conditions of operation of the electricity market, the production and consumption of reactive power by the synchronous generators in power plants shows a special importance. The paper analyzes the possibility of optimal distribution of reactive power on the synchronous generators in the case of a combined heat and power plant with 60 MW turbogenerators. The optimization problem consists...
The power quality monitoring is one of the modern issues of the electricity market. The permanent monitoring of power quality parameters is used to verify the contractual requirements presented in regulations. There is a need for common power quality indices that are the result of synthesis, reducing or extracting from a large volume of power quality measurement data. The values for these indices...
The paper presents a new type of electro-thermal converter whose particular applications are used especially in heating materials or residential buildings. The converter is in fact a single-phase transformer with a massif secondary winding, calculated to work in short-circuit but in a stabilized thermal regime. The authors developed a coupled electric-magnetic-thermal numerical model that improved...
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