Near field coupling to shielded cable due to switching operation in substation

Abstract

It is vital to study the electromagnetic coupling to shielded cable for improving electromagnetic anti- interference ability of secondary equipment in a substation. As a hybrid of method of moment (MoM) and transmission line method, a frequency domain model is put forward to study the near field coupling to shielded cable due to the switching operation in substation. Compared with the results of EMTP, the proposed method has been proven correct. Furthermore, this method overcomes the disadvantage of EMTP, which is only applicable for transient analysis of parallel conductors. As an example, the presented method is applied to evaluating the electromagnetic interference (EMI) to the shielded cable, whose shield is grounded at both ends, due to the switching operation in 500 kV air insulation substation (AIS).

References

1. Paul C R Analysisof Multi-Conductor Transmission LinesNew YorkJohn Wiley and Sons Press 1994
2. Tesche F M Ianoz M V Karlsson T EMC Analysis Methods and Computation ModelsNew YorkJohn Wiley and Sons Press 1996
3. Zhao Zhibin Cui Xiang Zhang Bo et al.The electromagnetic field calculation in substationby the method of momentProceedings of theChinese Society for Electrical Engineering 2004 24(11)148153(in Chinese)
4. Zhang Bo Zhao Zhibin Cui Xiang et al.Diagnosis of breaks in substation's grounding gridby using the electromagnetic methodIEEETransactions on Magnetics 2002 38(2)473476. doi:10.1109/20.996125
5. Zhang Bo Cui Xiang Zhao Zhibin et al.An electromagnetic approach to analyze the performanceof the substation's grounding grid in high frequency domainThe International Journal for Computation and Mathematicsin Electrical and Electronic Engineering (COMPEL) 2003 22(3)756769. doi:10.1108/03321640310475173
6. Nucci C A Rachidi F On the contribution of theelectromagnetic field components in field to transmission line interactionIEEE Transactions on Electromagnetic Compatibility 1995 37(4)505508. doi:10.1109/15.477334
7. Qi Lei Cui Xiang Lu Tiebing et al.Measurement of distributed parameters and transientanalysis of shielded cableProceedings ofthe Chinese Society for Electrical Engineering 2005 25(6)119123(in Chinese)
8. Lu Tiebing Yang Peiming Guo Lin et al.Measurement of transfer impedance of control cablesin substationsIn: Proceedings of the 7thInternational Conference on Electronic Measurement and Instruments,Beijing. 2005 1124127