Abstract
Power line emissions and harmonic radiations have been recognized as a kind of electromagnetic interference to the near-Earth space environment. This study demonstrates their direct dependence on the terrestrial power system used. By examining electric field data obtained by the satellite DEMETER, we observed several typical 50-, 60-, and 180-Hz emissions above Japan originating from a 50-Hz/60-Hz hybrid power system over two consecutive days. We analyzed all the emission events of 50 Hz and its harmonic frequencies detected as DEMETER flew over China. In 2009, the number of power line harmonic radiation (PLHR) events suddenly increased when multiple ultra-high-voltage transmission lines were built and put into operation. Based on the seasonal and diurnal distribution of the observed events, we conclude that PLHR is closely related to power consumption as we observe that it is mainly distributed above highly populated places and as such the radiation may originate from the low-voltage power distribution network. The magnitude and frequency of electrical currents flowing through transmission lines during both regular and faulty operation that can generate emissions reaching the ionosphere are analyzed for different voltage classes.
| Original language | English |
|---|---|
| Article number | 8734797 |
| Pages (from-to) | 947-954 |
| Number of pages | 8 |
| Journal | IEEE Transactions on Electromagnetic Compatibility |
| Volume | 62 |
| Issue number | 3 |
| DOIs | |
| State | Published - Jun 2020 |
Keywords
- Aeronautics and space electromagnetic compatibility
- electromagnetic environment
- low-frequency electromagnetic compatibility
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