Research for Electric Energy Systems
- ed.
This report documents the technical progress in investigations. The first investigation is concerned with the measurement of magnetic fields in support of epidemiogical and in vitro studies of biological field effects. NIST cohosted a workshop on exposure and biological parameters that should be considered during the vitro studies with extremely low frequency (ELF) magnetic and electric fields. Also, equations were developed to predict the magnetic field in a parallel plate magnetic field exposure system. The second investigation is concerned with two different activities: the detection of trace levels of S{sub 2}F{sub 10} in SF{sub 6} and the development of an improved stochastic analyzer for pulsating phenomena (SAPP). The detection of S{sub 2}F{sub 10} in the presence of SF{sub 6} using mass-spectrometric detection coupled to a gas chromatograph is difficult because of the similar mass spectra. A technique is described that enables the detection of S{sub 2}F{sub 10} in gaseous SF{sub 6} down to the ppb level using a modified gas chromatograph-mass spectrometer. The new system was applied to an investigation of the stochastic behavior of negative corona (Trichel pulses) and the effect of a dielectric barrier on these discharges. The third investigation is concerned with breakdown and prebreakdown phenomena in liquid dielectrics. The activity reported here was a study of negative steamers preceding electric breakdown in hexanes. Using the image preserving optical delay, the growth of the streamers associated with partial discharges at a point cathode are photographed at high magnification. The last investigation is concerned with the evaluation and improvement of methods for measuring fast transients in electrical power systems such as might be associated with an electromagnetic impulse. A compact resistive divider, NIST4, was designed. It is anticipated that this divider together with some Kerr electro-optical devices will be used as the reference system at NIST.
- Research Organization:
- National Inst. of Standards and Technology (NML), Gaithersburg, MD (United States). Electricity Div.
- Sponsoring Organization:
- National Institute of Standards and Technology (NIST); National Inst. of Standards and Technology, Gaithersburg, MD (United States)
- OSTI ID:
- 5189145
- Report Number(s):
- NISTIR-4691; ON: DE92001714
- Country of Publication:
- United States
- Language:
- English
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Research for electric energy systems: An annual report
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Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
DIELECTRIC MATERIALS
BREAKDOWN
MAGNETIC FIELDS
BIOLOGICAL EFFECTS
MEASURING METHODS
POWER SYSTEMS
RESEARCH PROGRAMS
SULFUR FLUORIDES
DECOMPOSITION
CORONA DISCHARGES
ELECTRIC FIELDS
ELECTRICAL INSULATORS
ELECTRICAL TRANSIENTS
EPIDEMIOLOGY
GAS CHROMATOGRAPHY
GASES
LIQUIDS
MASS SPECTROSCOPY
POWER TRANSMISSION
PROGRESS REPORT
PULSES
TOXIC MATERIALS
CHEMICAL REACTIONS
CHROMATOGRAPHY
DOCUMENT TYPES
ELECTRIC DISCHARGES
ELECTRICAL EQUIPMENT
ENERGY SYSTEMS
EQUIPMENT
FLUIDS
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
MATERIALS
SEPARATION PROCESSES
SPECTROSCOPY
SULFUR COMPOUNDS
TRANSIENTS
VOLTAGE DROP
240500* - Power Transmission & Distribution- Environmental Aspects- (1990-)
240400 - Power Transmission & Distribution- Health & Safety- (1990-)
400102 - Chemical & Spectral Procedures