Dynamic Thermal Modeling of Voltage Divider Capacitive Coupling

This paper deals with the thermal model and compensation of the thermal drift in a capacitive voltage sensor installed on top of the semiconducting layer of cross-linked polyethylene (XLPE) cable. The analysis of the thermal phenomena underlying the system shows a high dependency on the relative permittivity of the XLPE material. The first compensation method consists of installing an external capacitor with the same temperature coefficient as the cable capacitance. This method is limited because of the nonlinear thermal behavior of the cable capacitance. The second method consists of measuring the conductor current and the outer XLPE temperature, and estimating the temperatures and properties of the cable by means of an offline-derived, built-in model. The simulations and tests show the obtained improvements of the different methods in the operational temperature range.

[1]  T·德莱贝尔,et al.  High voltage measurement system , 2012 .

[2]  Sebastian Eggert,et al.  Terminal connection device to a power cable , 2011 .

[3]  Juergen Biela,et al.  Coaxial capacitive voltage divider with high division ratio for high voltage pulses with very fast rise times , 2011, 2011 IEEE Pulsed Power Conference.

[4]  M. Nedjar,et al.  Influence of moisture on the electrical properties of XLPE insulation , 2010, 2010 Annual Report Conference on Electrical Insulation and Dielectic Phenomena.

[5]  K. Väkeväinen.  The effect of material properties to electric field distribution in medium voltage underground cable accessories , 2010 .

[6]  Yongchun Liang,et al.  Coupled Electromagnetic-Thermal Modeling the Temperature Distribution of XLPE Cable , 2009, 2009 Asia-Pacific Power and Energy Engineering Conference.

[7]  Bing Ye,et al.  Coaxial Capacitive Dividers for High-Voltage Pulse Measurements in Intense Electron Beam Accelerator With Water Pulse-Forming Line , 2009, IEEE Transactions on Instrumentation and Measurement.

[8]  R. D. Findlay,et al.  Combined simulation-experimental approach to power cable thermal loading assessment , 2008 .

[9]  G. Mazzanti,et al.  Analysis of the Combined Effects of Load Cycling, Thermal Transients, and Electrothermal Stress on Life Expectancy of High-Voltage AC Cables , 2007, IEEE Transactions on Power Delivery.

[10]  Ion Carstea,et al.  Simulation of coupled electric and thermal fields in coaxial cables , 2003, 6th International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Service, 2003. TELSIKS 2003..

[11]  J. Cidras,et al.  Theoretical Model to Calculate Steady-State and Transient Ampacity and Temperature in Buried Cables , 2002, IEEE Power Engineering Review.

[12]  R. Strobl,et al.  Medium voltage terminations using an advanced stress control technology , 2001, 2001 IEEE/PES Transmission and Distribution Conference and Exposition. Developing New Perspectives (Cat. No.01CH37294).

[13]  Mladen Kezunovic,et al.  Mathematical models for current, voltage, and coupling capacitor voltage transformers , 2000 .

[14]  Eugeniusz Rosolowski,et al.  Dynamic compensation of capacitive voltage transformers , 1998 .

[15]  コー，ローレンス・シー,et al.  Stress control termination for a high voltage cable , 1997 .

[16]  S. V. Nikolajevic,et al.  Investigation of water effects on degradation of crosslinked polyethylene (XLPE) insulation , 1993 .

[17]  R. Eichhorn,et al.  A Critical Comparison of XLPE-and EPR for Use as Electrical Insulation on Underground Power Cables , 1981, IEEE Transactions on Electrical Insulation.

[18]  J. Lienhard.  A heat transfer textbook , 1981 .