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| Over-voltage Analysis and Suppression in the Traction Network Double Neutral Section Electrical Sectioning Device |
| QU Zlu-jian, LIU Yu-xin , ZHOU Min |
| East China Jiaotong University，Nanchang, Jiangxi 330013 China |
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Abstract Research purposes:In order to research over-voltage produced by electric locomotive power outage over split-phase which makes equipment insulation breakdown，chain-type equivalent circuit model of timing switch control is established. The new suppression method which suppress the over-voltage is proposed compared with the over -voltage produced by joint simulation model in the single and double neutral section of seven/eight span overlapping electrical sectioning device in electric locomotive-electrical sectioning-traction network.
Research conclusions:(1)The over-voltage of seven-span overlapping electrical sectioning device is consistent with the test results of literature，and the residual pressure co-simulation and the theoretical value are about 11 kV，which further prove the effectiveness of the simulation.(2)The maximum overvoltage decreases from 95. 57 kV in the single neutral section of the seven-span overlapping electrical sectioning device to 59. 28 kV in the bilateral neutral passive RC circuit of the eight-span overlapping electrical sectioning device，which suppressive effect is obvious. （3）Experimental results have the important reference value for anchor section joint electrical phase design.
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Received: 15 July 2013
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2014, Vol. 31 
