Showing papers on "Grid-connected photovoltaic power system published in 1974"

Feasibility study of a satellite solar power station. Final report

Abstract: A feasibility study of a satellite solar power station (SSPS) was conducted to: (1) explore how an SSPS could be flown and controlled in orbit; (2) determine the techniques needed to avoid radio frequency interference (RFI); and (3) determine the key environmental, technological, and economic issues involved. Structural and dynamic analyses of the SSPS structure were performed, and deflections and internal member loads were determined. Desirable material characteristics were assessed and technology developments identified. Flight control performance of the SSPS baseline design was evaluated and parametric sizing studies were performed. The study of RFI avoidance techniques covered (1) optimization of the microwave transmission system; (2) device design and expected RFI; and (3) SSPS RFI effects. The identification of key issues involved (1) microwave generation, transmissions, and rectification and solar energy conversion; (2) environmental-ecological impact and biological effects; and (3) economic issues, i.e., costs and benefits associated with the SSPS. The feasibility of the SSPS based on the parameters of the study was established.

Solutions to Industrial and Commercial Needs Using Multiple Utility Services and Emergency Generator Sets

Abstract: Industrial and commercial installations generally require more than one power source to ensure continuity of electrical power to essential loads. Two principal methods are 1) two utility services and 2) one utility service and on-site generation. Load requirements, reliability, installation feasibility, and economy are some of the governing factors in the selection of which combination of power sources should be used. Furthermore, transfer switches, overcurrent protective devices, and associated controls must be coordinated in the system.

Uncertainties in predicting solar panel power output

Abstract: The problem of calculating solar panel power output at launch and during a space mission is considered. The major sources of uncertainty and error in predicting the post launch electrical performance of the panel are considered. A general discussion of error analysis is given. Examples of uncertainty calculations are included. A general method of calculating the effect on the panel of various degrading environments is presented, with references supplied for specific methods. A technique for sizing a solar panel for a required mission power profile is developed.