Analysis on the spectrum characteristic of corona Current and its relationship with Radio Interference on UHVDC transmission line

Research on the correlation between the frequency‐domain characteristics of corona current and A‐weighted sound level of audible noise for UHV DC transmission line

“…According to our previous research, the interfering signals mixed in the corona current include three types [27]: (i) the 100 Hz signal and its harmonic signals, which are produced due to incomplete inversion and rectification of the high-voltage generator. The amplitudes of these harmonic signals are relatively high when the frequency is within 600 Hz.…”

“…For the above three types of signals, different methods are adopted to eliminate their influences in this paper. The specific noise reduction process will not be discussed in detail since it is not the key point of this paper, and relative research could refer to the work in [27,28]. Fig.…”

Time Domain Measurement System for Electric Field of Radio Interference Generated by Corona Discharge

“…However, the existing research mainly focuses on the measurement of single frequency points (0.5MHz or 1MHz) or multiple frequency points of radio interference. This measurement method belongs to the frequency domain measurement method [7][8][9][10][11]. The measurement results reflect the IOP Publishing doi:10.1088/1742-6596/2384/1/012031 2 comprehensive effect of radio interference over a period of time, but it is difficult to reflect the intrinsic characteristics of radio interference [12].…”

Analysis of the relationship between DC component and spectral components of corona current on HVDC transmission lines

“…On the other hand, researches in recent years showed that the frequency domain characteristics of corona current are closely related with a variety of corona effects, such as audible noise [27][28][29][30]. In [29], the correlation between corona current spectrum and audible noise spectrum below 20 kHz was studied, and it has been found that the variation laws of audible noise and corona current are very similar in the band of 2-20 kHz.…”

“…In [26], it was pointed out that, the 1/3 octave power spectrum (1/3 OPS) of corona current, which can be used to calculate corona inception voltage, increases with voltage raise of HVDC transmission lines. In [27], the change rule of corona current spectrum was found in the frequency range of 0.15–4 MHz. In [1], the self‐correlation of corona current spectrum was analysed in the band of 5–20 kHz.…”