Study of electric field and ion effects on HVDC lines

Feasibility of conducting studies of HVDC electrical environment beyond the transmission corridor and of studying human perception of the electrical environment of high voltage transmission lines was investigated. Contract modifications contains the following tasks: (1) extend techniques of measurements of electric field, ion density, and net aerosol charge to off-ground positions; (2) develop measuring technique for the characterization of charged aerosols; (3) calibrate the instrumentation to measure charged aerosols; (4) measure the downwind lateral and vertical profiles of electric field, ion density, and net aersol charge density both at HVTRF and at the site of an operating HVDC line; (5) study the feasibility of measuring aerosol charging and wind transport in aerosol environments other than those normally present at HVTRF or existing HVDC lines; (6) check and validate mathetical methods of prediction of downwind charge for monopolar HVDC lines; and (7) support for research on human perception of fields and ions of ac and dc transmission lines.