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YN／V阻抗匹配平衡牵引变压器(SF2-QY)

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阻抗匹配平衡牵引变压器电流平衡度指标

    YN/V阻抗匹配平衡牵引变压器，是我公司与湖南大学、铁道部第二勘测设计院、成都铁路局共同开发的牵引变压器，容量为10000~63000kVA。该产品1990年9月样机研制成功，在宝成线青白江站通过一年的试运行后于1991年11月通过了两部鉴定，1997年11月获中国专利发明创造金奖，已被列为国家火炬计划高新技术产品。该系列产品1999年11月在沈阳虎石台变压器国家检测中心，一次顺利通过突发短路试验。迄今为止，已为京郑线、成昆线、武广线、内昆线、贵娄线、衡广线、宝二线、渝达线、广深线、宝成线、宝兰线、丰沙大线、株六复线、盘西线等线路提供了二百多台平衡牵引变压器，通过实际运行，都取得了较好的效果。

YN/V Impedance-matched Balance Traction Transformer (SF2-QY)

  YN/V connected impedance-matched balance traction transformer is a cooperation product of Yunnan Transformer Electric Co., Ltd., Hunan University, No.2 Survey & Design Institute of Railway Ministry and Chengdu Railway Bureau. The capacity range is 10000 ~ 63000 kVA. The first model machine was made in September, 1990 and passed the appraisal of Railway Ministry and Machinery Ministry in November, 1991 after being tested operation for one year in Qingbaijiang substation on Bao-Cheng line. YTEC got Gold Prize of China Patent Invention in November 1997. It is listed as High-tech product in National Torch Plan. In November, 1999, this product once passed through the sudden short-circuit test in China National Transformer Quality Supervision & Inspection Center in Hushitai, Shenyang. Up to now, YTEC has already provided more than 200 sets of balance traction transformers for Jing-Zheng, Cheng-Kun, Wu-Guang, Guang-Shen, Bao-Cheng, Bao-Lan, Fengshada, Zhu-Liu Double, Nei-Kun, Gui-Lou, Heng-Guang, Bao-Er, Yu-Da and Pan-Xi lines. And these products made better effect through actual operation.

特点：

1．该牵引变压器的接线图在国内外均为首创，结构上有突破性的改进，以不对称的结构实现运
行功能上的平衡与对称，它既可制造成用于铁路电气化“BT”或直接供电方式供电的产品，又能制造成按“AT”供电方式的产品 ,可满足两相制供电的要求，能有效减小零序和负序电
流。 
2．输出容量大、负荷能力强，在原边电流相同的情况下，付边电路电流是YNd11牵引变压器的
1.323倍，一台20000kVA的负荷能力相当于YNd11牵引变压器26460kVA的负荷能力，容量利用率达到了100%。 
3．付边两臂电流相等时，原边三相电流为对称系, 即使付边两相电流不等(一相有，一相无；或者一相大，一相小)原边三相的中性点电流也为零。 
4．原边仍为YN接法，中性点可接地，与传统的电力变压器相同。 
5．付边尽管为两相制，但仍有“△”形接法的线圈，能有效限制高次谐波。 

Characteristics:

1. The connection diagram is pioneer both at home and abroad. A breakthrough is made in transformer construction. After the balance and symmetry on operation function is realized with unsymmetrical structure, the transformer can be made not only for BT power supply, but also for AT power supply, which can meet the requirement of 2-phase power-supply system. It is able to effectively decrease zero sequence and negative sequence current. 
2. Bigger output power and stronger load-bearing ability: its current on secondary side is 1.323 times of that of YNd11 traction transformer when the primary currents are same. Namely, the load bearing ability of 20000kVA is same as 26460 kVA YNd11 traction transformer. Its power utilization ratio reaches 100%.
3. Primary 3-phase current is symmetrical system when 2 arms currents on secondary side are equal. The neutral point current in primary 3-phase system is zero even if the secondary 2-phase currents are unequal (current in 1 phase, and no current in another phase; or higher current in1 phase and lower current in another phase ).
4. Primary side is YN connection and neutral point can be earthed, which are same as conventional power transformer.
5. Secondary side has "△" connected winding even if it is 2-phase system, which can effectively confine frequently harmonic wave.

阻抗匹配平衡牵引变压器电流平衡度指标