Humidity effects on the ground-level resultant electric field of positive DC conductors
|
摘要
The effects of humidity on the ground-level resultant electric field around positive DC conductors were studied both experimentally and numerically. Experiments were carried out in an artificial climate chamber, the results of which showed that the photon count and the groundlevel resultant electric field strength both increased with increasing relative humidity. Numerical calculations for different values of relative humidity were carried out, including solutions of the positive corona inception voltage and the ion-flow field, for which a photoionization model and the upstream finite element method were employed, respectively. In order to analyze the effects of humidity, three main factors were considered: the ionization coefficient, the attachment coefficient in the photoionization model and the modified ion mobility of the charged water particles. The results indicated that, with increasing relative humidity, increasing values of the effective ionization coefficient were responsible for a reduction in the inception voltage, and the reduction reinforced the ground-level resultant electric field. Moreover, due to the charged water particles and the lower ion mobility with increasing relative humidity, the space charge density distribution was enhanced, which also strengthened the ground-level resultant electric field.
The effects of humidity on the ground-level resultant electric field around positive DC conductors were studied both experimentally and numerically. Experiments were carried out in an artificial climate chamber, the results of which showed that the photon count and the groundlevel resultant electric field strength both increased with increasing relative humidity. Numerical calculations for different values of relative humidity were carried out, including solutions of the positive corona inception voltage and the ion-flow field, for which a photoionization model and the upstream finite element method were employed, respectively. In order to analyze the effects of humidity, three main factors were considered: the ionization coefficient, the attachment coefficient in the photoionization model and the modified ion mobility of the charged water particles. The results indicated that, with increasing relative humidity, increasing values of the effective ionization coefficient were responsible for a reduction in the inception voltage, and the reduction reinforced the ground-level resultant electric field. Moreover, due to the charged water particles and the lower ion mobility with increasing relative humidity, the space charge density distribution was enhanced, which also strengthened the ground-level resultant electric field.
The effects of humidity on the ground-level resultant electric field around positive DC conductors were studied both experimentally and numerically. Experiments were carried out in an artificial climate chamber, the results of which showed that the photon count and the groundlevel resultant electric field strength both increased with increasing relative humidity. Numerical calculations for different values of relative humidity were carried out, including solutions of the positive corona inception voltage and the ion-flow field, for which a photoionization model and the upstream finite element method were employed, respectively. In order to analyze the effects of humidity, three main factors were considered: the ionization coefficient, the attachment coefficient in the photoionization model and the modified ion mobility of the charged water particles. The results indicated that, with increasing relative humidity, increasing values of the effective ionization coefficient were responsible for a reduction in the inception voltage, and the reduction reinforced the ground-level resultant electric field. Moreover, due to the charged water particles and the lower ion mobility with increasing relative humidity, the space charge density distribution was enhanced, which also strengthened the ground-level resultant electric field.
引文
[1] Bian X M et al 2018 High Volt. 3 126
[2] Xu J Y et al 2018 Sci. China Technol. Sci. 61 1197
[3] Li X B et al 2018 Plasma Sci. Technol. 20 054014
[4] Liu Y P et al 2014 IEEE Trans. Power Deliv. 29 615
[5] Bian X M et al 2018 Appl. Phys. Lett. 113 204102
[6] Maruvada P S 2012 IEEE Trans. Power Deliv. 27 401
[7] Maruvada P S 2011 Corona in Transmission Systems:Theory,Design, and Performance(Johannesburg, South Africa:Eskom Holdings)pp 92–8
[8] Jin S et al 2016 Plasma Sci. Technol. 18 998
[9] Maruvada P S 2014 IEEE Trans. Power Deliv. 29 2561
[10] Peek F W 1929 Dielectric Phenomena in High Voltage Engineering(New York:McGraw-Hill Press)
[11] Hartmann G 1984 IEEE Trans. Ind. Appl. 20 1647
[12] Abdel-Salam M and Allen N L 2005 IEE Proc. Sci. Meas.Technol. 152 227
[13] Lowke J J and D’Alessandro F 2003 J. Phys. D:Appl. Phys.36 2673
[14] Yamazaki K and Olsen R G 2004 IEEE Trans. Dielectr. Electr.Insul. 11 674
[15] Bian X M et al 2010 IEEE Trans. Dielectr. Electr. Insul. 17 63
[16] Ortéga P et al 2007 J. Phys. D:Appl. Phys. 40 7000
[17] Wang W et al 2008 The effect of temperature and humidity on corona inception voltage gradient of UHV DC transmission line Proc. of 2008 Int. Conf. on Condition Monitoring and Diagnosis(Beijing, China:IEEE)2008, p 816
[18] Hu Q et al 2011 IET Gener. Transm. Distrib. 5 621
[19] Xu M M, Tan Z Y and Li K J 2012 IEEE Trans. Dielectr.Electr. Insul. 19 1377
[20] Hu Q et al 2014 Int. Trans. Electr. Energy Syst. 24 723
[21] Takuma T and Kawamoto T 1987 IEEE Trans. Power Deliv.2 189
[22] Zeng Y Z, Cui X and Lu T B 2014 Sci. China Technol. Sci.57 747
[23] Zhen Y Z et al 2011 Proceed. CSEE 31 120(in Chinese)
[24] Qiao J et al 2017 IET Gener. Transm. Distrib. 11 1055
[25] Wang D L et al 2018 Plasma Sci. Technol. 20 054008
[26] Zhou Y X et al 2018 Plasma Sci. Technol. 20 054016
[27] Bian X M et al 2011 IEEE Trans. Dielectr. Electr. Insul.18 809
[28] Loeb L B 1965 Electrical Coronas:Their Basic Physical Mechanisms(Berkeley:University of California Press)
[29] Zheng Y S, Zhang B and He J L 2015 Phys. Plasmas 22063514
[30] Yi Y et al 2017 IEEE Trans. Power Deliv. 32 2171
[31] Morrow R and Lowke J J 1997 J. Phys. D:Appl. Phys. 30 614
[32] Abdel-Salam M 1985 IEEE Trans. Ind. Appl. IA-21 35
[33] Raizer Y P 1991 Gas Discharge Physics(Berlin:Springer)
[34] Maruvada P S 2000 Corona Performance of High-Voltage Transmission Lines(London, UK:Research Studies Press)pp 63–4
[35] Zou Z L, Cui X and Lu T B 2016 CSEE J. Power Energy Syst.2 88
[36] Li Z H, Zhong L X and Yu X R 1992 Acta Geogr. Sin. 47 242(in Chinese)
[37] Lu T B et al 2007 IEEE Trans. Magn. 43 1221
[2] Xu J Y et al 2018 Sci. China Technol. Sci. 61 1197
[3] Li X B et al 2018 Plasma Sci. Technol. 20 054014
[4] Liu Y P et al 2014 IEEE Trans. Power Deliv. 29 615
[5] Bian X M et al 2018 Appl. Phys. Lett. 113 204102
[6] Maruvada P S 2012 IEEE Trans. Power Deliv. 27 401
[7] Maruvada P S 2011 Corona in Transmission Systems:Theory,Design, and Performance(Johannesburg, South Africa:Eskom Holdings)pp 92–8
[8] Jin S et al 2016 Plasma Sci. Technol. 18 998
[9] Maruvada P S 2014 IEEE Trans. Power Deliv. 29 2561
[10] Peek F W 1929 Dielectric Phenomena in High Voltage Engineering(New York:McGraw-Hill Press)
[11] Hartmann G 1984 IEEE Trans. Ind. Appl. 20 1647
[12] Abdel-Salam M and Allen N L 2005 IEE Proc. Sci. Meas.Technol. 152 227
[13] Lowke J J and D’Alessandro F 2003 J. Phys. D:Appl. Phys.36 2673
[14] Yamazaki K and Olsen R G 2004 IEEE Trans. Dielectr. Electr.Insul. 11 674
[15] Bian X M et al 2010 IEEE Trans. Dielectr. Electr. Insul. 17 63
[16] Ortéga P et al 2007 J. Phys. D:Appl. Phys. 40 7000
[17] Wang W et al 2008 The effect of temperature and humidity on corona inception voltage gradient of UHV DC transmission line Proc. of 2008 Int. Conf. on Condition Monitoring and Diagnosis(Beijing, China:IEEE)2008, p 816
[18] Hu Q et al 2011 IET Gener. Transm. Distrib. 5 621
[19] Xu M M, Tan Z Y and Li K J 2012 IEEE Trans. Dielectr.Electr. Insul. 19 1377
[20] Hu Q et al 2014 Int. Trans. Electr. Energy Syst. 24 723
[21] Takuma T and Kawamoto T 1987 IEEE Trans. Power Deliv.2 189
[22] Zeng Y Z, Cui X and Lu T B 2014 Sci. China Technol. Sci.57 747
[23] Zhen Y Z et al 2011 Proceed. CSEE 31 120(in Chinese)
[24] Qiao J et al 2017 IET Gener. Transm. Distrib. 11 1055
[25] Wang D L et al 2018 Plasma Sci. Technol. 20 054008
[26] Zhou Y X et al 2018 Plasma Sci. Technol. 20 054016
[27] Bian X M et al 2011 IEEE Trans. Dielectr. Electr. Insul.18 809
[28] Loeb L B 1965 Electrical Coronas:Their Basic Physical Mechanisms(Berkeley:University of California Press)
[29] Zheng Y S, Zhang B and He J L 2015 Phys. Plasmas 22063514
[30] Yi Y et al 2017 IEEE Trans. Power Deliv. 32 2171
[31] Morrow R and Lowke J J 1997 J. Phys. D:Appl. Phys. 30 614
[32] Abdel-Salam M 1985 IEEE Trans. Ind. Appl. IA-21 35
[33] Raizer Y P 1991 Gas Discharge Physics(Berlin:Springer)
[34] Maruvada P S 2000 Corona Performance of High-Voltage Transmission Lines(London, UK:Research Studies Press)pp 63–4
[35] Zou Z L, Cui X and Lu T B 2016 CSEE J. Power Energy Syst.2 88
[36] Li Z H, Zhong L X and Yu X R 1992 Acta Geogr. Sin. 47 242(in Chinese)
[37] Lu T B et al 2007 IEEE Trans. Magn. 43 1221