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Research on the Space Electric Field Around HVAC-HVDC Hybrid Transmission Lines

Author: LiZuo
Tutor: LinFuChang
School: Huazhong University of Science and Technology
Course: High Voltage and Insulation Technology
Keywords: Hybrid Transmission Line Surface electric field Ground electric field Step - by - step method of images Deutsch assumption method
CLC: TM721.3
Type: Master's thesis
Year: 2011
Downloads: 49
Quote: 0
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Abstract


With the shortage of resources in the transmission line corridor , the HVDC line AC transmission lines parallel erection is inevitable . For saving the consideration of the transmission corridor in the future , and may even adopt the same tower of AC and DC . The size of the surface electric field of the transmission lines is an important basis Conductor Selection . The size of the ground electric field on reasonable assurance as to the width of the transmission line corridors and decided to wire height is very important . Study of AC and DC parallel hybrid transmission lines around the same tower space electric field is of great significance . AC and DC lines parallel or the same tower , another DC offset and AC ripple affect . Papers are used for the calculation of the transmission line surface electric field and ground electric field voltage instantaneous value . Will the AC subconductor and DC sub wire on a system calculated to fully consider the cross , the interaction between the DC line . Surface electric field for hybrid transmission lines , the paper is a step - by - step method of images . First analyzes the the subconductor circumferential surface of the electric field distribution characteristics and calculate the maximum of the the subconductor circumferential surface space , and then to calculate the maximum value at different times . Contrast , a numerical example , on this basis , to verify the effectiveness of the algorithm . AC transmission lines under ground electric field , the paper equivalent charge calculation ; ground electric field in the DC transmission line , the thesis Deutsch assumption method . In the the original Deutsch assumptions Law on the basis of the papers further amended , applied to the calculation of the ground electric field of the DC transmission line in the rainy case . Contrast , a numerical example , on this basis , to verify the reliability of the algorithm . Finally, four areas from the wire radius , wire split wire space structure ( parallel structure with the tower structure ) and weather conditions ( good weather and rainy ) analyzed the impact of the the wire surface electric field and the ground electric field . The results show that : reduce the wire radius ; increasing the number of wires split ; positive polarity DC line near the AC line parallel structure ; DC line in the AC line the upper and the tower structure , these measures can effectively reduce hybrid transmission lines space electric field.

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CLC: > Industrial Technology > Electrotechnical > Transmission and distribution engineering, power network and power system > Transmission and distribution technology > Transmission system > Hybrid Transmission
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