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Title: Identification of ions near HVDC (high-voltage direct-current) transmission lines: Final report

Positive and negative ion species were identified and studied at two separate field sites and one laboratory site. The first field study was conducted under an operating HVDC transmission line. The second was near a HVDC test line and measurements were performed with the line in both an energized and de-energized state. During clear, sunny days HSO/sub 4//sup /minus///center dot/H/sub 2/SO/sub 4/ was observed to be the dominant negative ion in the natural ion spectrum. At night, however, HSO/sub 4//sup /minus// core ions virtually disappeared, and were replaced by NO/sub 3//sup /minus// core ions and their first nitric acid cluster. Both negative spectra also typically contained lesser concentrations of the malonate ion. The transmission line negative spectra were similar but were typically dominated by the NO/sub 3//sup /minus// core ions during both day and night. The positive ions observed under HVDC lines were typically either NH/sub 4//sup +/ or C/sub 5/H/sub 6/N/sup +/, which reacted with higher proton affinity species (such as methylpyridines, trimethylamine and quinoline) farther from or in the absence of the transmission line. The observed differences between natural and anthropogenic ion spectra near HVDC lines are attributed primarily to a shortening of ion lifetimes by the strongmore » electric field associated with the HVDC lines. One exception is the production of potassium and probably sodium based ions from the decomposition of insects in transmission line coronas. 22 refs., 29 figs.« less
Authors:
Publication Date:
OSTI Identifier:
6043108
Report Number(s):
EPRI-EN-6391
Resource Type:
Technical Report
Research Org:
Electric Power Research Inst., Palo Alto, CA (USA); Georgia Inst. of Tech., Atlanta (USA). Electromagnetics Lab.
Country of Publication:
United States
Language:
English
Subject:
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.; CORONA DISCHARGES; BIOLOGICAL EFFECTS; IONS; PRODUCTION; ELECTRIC FIELDS; HVDC SYSTEMS; PROGRESS REPORT; QUANTITATIVE CHEMICAL ANALYSIS; CHARGED PARTICLES; CHEMICAL ANALYSIS; DC SYSTEMS; DOCUMENT TYPES; ELECTRIC DISCHARGES; ENERGY SYSTEMS; POWER SYSTEMS 560400* -- Other Environmental Pollutant Effects