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Corona cage six bundle conductors corona loss were measured, and corona onset electric field was obtained. The IEC 61284 standard was adopted as altitude correction. And add to this, exponential form and linear form altitude correction formulae were adduced. The results show that, exponential form altitude correction formulae calibration error and dispersion are less, and the adjustment effect is better; for convenient engineering application, linear correction formulae can be adopted; for estimation in the rough, sea level as base, as altitude increases every 1000m, conductor corona onset electric field decreases about 7%.

In order to research high level harmonic wave of six bundle conductors corona current, a measurement system was developed, and a series of wave data was obtained. Corona current is one of important corona characteristic research contents. The corona current measurement system can be used to measure the wide frequency band corona current. Six-bundle conductors was tested, and corona current was obtained. And the current signal collected in this way is safe and reliable. To research the six-bundle conductors’ corona current characteristic, conductor corona current harmonic wave was analyzed, by advanced Hanning windowed interpolation FFT algorithm was adopted. Corona current harmonic characteristics before and after corona onset were compared. Research results show that, after corona onset, corona current odd harmonic increases in evidence, and even-order harmonic increase less relatively. Triple-frequency harmonics and quintuple harmonics increase obviously very much.