Showing papers on "Stand-alone power system published in 1980"

Optimal Generation Scheduling of Hydrothermal Power Systems

Abstract: In this paper decomposition and coordination techniques are applied to minimize the operation al cost of hydrothermal power systems. Through this for muXation large systems are dealt with by a more general and precise model that includes thermal operation costs and hydroelectric power generation as nonlinear functions, water head variations, stochastic load demands, hydraulic networks with cascade plants, time delays, and spilling. An economic interpretation and an example are given.

Generation of electricity with wind power.

Abstract: THE work of the Section on Rural Electrification of the British Electrical and Allied Industries Research Association has already included research on the small-scale generation of electricity, principally by wind power. Recent shortages of power and fuel have aroused interest in the possibility of utilizing wind power on a large scale for the generation of electricity in Great Britain. Following earlier discussions with the relevant Ministries and other interested parties, the Association has established a new Section on Power Generation with the following terms of reference : "To study the technical and economic problem of large-scale aerodynamic generation in Great Britain ; including the collection of all available information and evidence, the principles of the selection of sites and the wind energy derivable therefrom, the co-ordination of wind-driven generators with supply systems, the essential design features of wind-driven generators and the design problems which remain to be solved". The chairman of the new Sectional Committee is to be Mr. T. G. N. Haldane of Messrs. Merz and McLellan. The Committee is expected to comprise representatives from electricity supply, electrical manufacturers, consulting engineers, the Department of Scientific and Industrial Research and the Lord President‘s Office, the Meteorological Office, the Ministry of Fuel and Power and the Ministry of Supply. Representatives of the aircraft industry will also be invited, as may seem desirable. The research officer for the new Section will be Mr. E. W. Golding, who is in charge of the Association‘s work on rural electrification and its field station at Shinfield Green, near Reading.

A dish-Stirling solar-thermal power system

Abstract: This paper presents results of a preliminary design/economic study of a first-generation point focusing distributed receiver solar-thermal electric system optimized for application to industrial and small community power plants at power levels up to 10 MWe. Power conversion is provided by small Stirling cycle engines mounted at the focus of paraboloidal solar concentrators. The output of multiple power modules (concentrator, receiver, engine, and electric generator) is collected by means of a conventional electrical system and interfaced with a utility grid. Based on the United Stirling P-75 engine, a 1 MWe system employing mass-produced components (100,000 modules/year) could produce electricity at costs competitive with those projected for electricity generated by more conventional means, e.g. with fossil fuels.

Impact of weather on power system loads

Abstract: As a result of the growth that has occurred in the use of electricity for space and water heating, as well as for air conditioning, the load requirements of electric utilities have tended to become more sensitive to fluctuations in weather. In general, the approach that is discussed in this paper has been tailored to reflect the limited availability of data on the factors governing peak demand growth. 6 refs.

Computer simulation of the operations of utility grid connected photovoltaic power plants

Abstract: In order to evaluate the commercial viability of photovoltaic power systems it is necessary to have reliable estimates and descriptions of the supply of electricity generated by the solar technology, the demand for that electricity, and the market application A methodology which produces information on performance, cost, and value components of utility grid connected photovoltaic power plants has been developed to assist in these evaluations (References 1, 2) This report describes that analytical model and presents an application to a utility grid connected central power system with a range of operations alternatives

Heating with off-peak electricity: a cost-effective way to save oil and gas

Abstract: Publisher Summary Electric heating, when combined with appropriate load management techniques, is an efficient method of providing building heating services. An important economic consideration is that electricity can be produced from relatively abundant coal and nuclear fuels. A second consideration is that for some years into the future, it will be possible to make use of low cost off-peak electricity while avoiding many of the capital costs normally associated with the generation, transmission, and distribution of electricity. This can be accomplished either by incorporating a thermal energy storage device in the heating system or by adding a dual-fuel backup capability. It is discussed that the thermodynamic argument against electricity can be put to rest if heat pumps are used. When heat pumps are used, the overall thermodynamic efficiency, counting losses in electric generation and transmission, can be brought up to the level for oil and natural gas. Like resistive systems, heat pumps can be combined with off-peak thermal storage technologies.