Integration and Tests of the 1 250 kV·A Three-Phase High Temperature Superconducting Transformer
Ma Tao1,2,Zhu Zhiqin1,2,Qiu Qingquan1,2,Hu Lei1,2,Teng Yuping1,2
1.Institute of Electrical Engineering Chinese Academy of Sciences Beijing 100190 China
2.Key Laboratory of Applied Superconducting Chinese Academy of Sciences Beijing 100190 China
A 1 250 kV·A/10.5 kV/0.4 kV three-phase high temperature superconducting (HTS) transformer has been designed, integrated,tested and grid-connection demonstrated.The windings of the HTS transformer are made from copper alloy enforced Bi2223/Ag tapes,and the structures of the primary and secondary windings are solenoid and double-pancake,respectively.The three-phase three-limb core is composed of oriented silicon sheet steel,and the cryostat is made of low-temperature resistant glass fiber enforced plastics with room temperature bore.According to the tests,the no-load loss is 2 319.2 W,the no-load current is 0.254%,the short-circuit impedance is 5.6%,and the average load loss is 249 W.Besides,the maximum leakage current between primary and secondary windings is about 12.6 mA under the power frequency voltage withstand test of 35 kV/1 min/50 Hz,and the negative full wave lighting impulse test with a peak voltage of 75kV/1.2 μs/50 μs from the primary winding is carried out.The grid-connection demonstration of the HTS transformer was carried out since September 9th,2014 and is reliable until now.
马韬,朱志芹,邱清泉,胡磊,滕玉平. 1 250 kV·A三相高温超导变压器的系统集成与试验[J]. 电工技术学报, 2016, 31(21): 188-195.
Ma Tao,Zhu Zhiqin,Qiu Qingquan,Hu Lei,Teng Yuping. Integration and Tests of the 1 250 kV·A Three-Phase High Temperature Superconducting Transformer. Transactions of China Electrotechnical Society, 2016, 31(21): 188-195.
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2016, Vol. 31 
