Research for Electric Energy Systems: An Annual Report, October 1993

摘要

The report documents the technical progress of two investigations. The first investigation is concerned with the measurement of magnetic fields in support of epidemiological and in vitro studies of biological field effects. During 1992, the derivation of equations which predict differences between the average magnetic flux density using circular coil probes and the flux density at the center of the probe, assuming a dipole magnetic field, were completed. The information gained using these equations allows the determination of measurement uncertainty due to probe size when magnetic fields from many electrical appliances are characterized. Consultations with various state and federal organizations and the development of standards related to electric and magnetic field measurements continue. The second investigation is concerned with two different activities related to compressed-gas insulated high voltage systems: (1) the measurement of dissociative electron attachment cross sections and negative ion production in S2F10, S2OF10, and S2O2F10, and (2) Monte-Carlo simulations of ac-generated partial-discharge pulses that can occur in SF6- insulated power systems and can be sources of gas decomposition.