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Wuxi Rongna Electric CO., LTD.

158 6166 8160

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Wuxi Rongna Electric Co., LTD.

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Mob: 158 6166 8160

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What is the pulse forming network

Release date: 2017-09-15 14:58:05 Visits: 529

At present, the gap between domestic products and the international advanced product level, mainly the product appearance is poor, the main technical and economic indicators than the specific characteristics (kg / kvar) larger, poor product sets.
Major product technical indicators Differences:
     1, domestic shell high voltage parallel capacitor single capacity small. From the late 80s of the 20th century, domestic large capacity capacitors are still a single 334kvar products as the leading, in recent years there have been 500kvar capacitor products, Xi''an ABB joint venture products to a single capacity of 823kvar. While the foreign Sweden, the United States GE, the United States COOPER company from 1998 has been in bulk to provide a single 1000kvar capacitor.
     2, domestic high-voltage capacitor specificity gap. Domestic and foreign capacitors are roughly proportional to the ratio of foreign: joint venture: domestic = 1: 1.5: 2, that is, with the capacity of the volume of domestic capacitors, quality than foreign products doubled. At present, China''s production of full-film high-voltage shunt capacitor field is also relatively low (45 ~ 55MV / m), compared with foreign (workplace strong 60 ~ 70MV / m) there is a big gap. The domestic capacity of such a capacitor has been done 500-700kvar / Taiwan, for the collection and reduction of high-voltage parallel capacitor single capacity has been done 10000kvar / Taiwan, the capacitor power loss is no more than 0.5W / kvar, with the international The level of the advanced level of performance in the capacity of the capacitor capacity and volume are larger, the domestic capacitor is 0.2 ~ 0.8kg / kvar, while the developed countries produce the same type of capacitance per kvar of 0.1 ~ 0.2kg / kvar. Domestic and foreign capacitor media field strong, internal components voltage and mass ratio comparison in Table 2.
     3, low-voltage self-healing parallel capacitor overall product and the international level there is still a gap. The equipment used mainly depends on the import, the quality of domestic metallized film is unstable, the raw material part is also imported.
     4, compensation location choice is different. Foreign widely used in the 345kV and below the main load side compensation, the domestic to 66kV and below the three side of the main compensation. The advantage of the main load side compensation is the direct compensation, the effect is good, and the main transformer structure can be simplified, the cost is reduced, improve the transmission power.
     5, the appearance of the product gap. Domestic capacitors are generally not beautiful shape, rough processing technology, welding and anti-corrosion coating poor quality and other significant gaps.

     6, in the static dynamic reactive power compensation and series compensation and other high-tech there is still a big gap. From the beginning of the 20th century, the beginning of the early 80s, through the digestion and absorption of the introduction of technology in the manufacturing technology, product quality and operational technology have a rapid development, fundamentally changed the technical situation of domestic capacitors, from the product operation reliability, Domestic capacitors and imported products is not inferior, and some better than imported products. In recent years, the industry closely follow the development trend of foreign advanced technology, successfully promoted the technological progress of the product, realized by the whole paper medium, film composite media to the whole film medium transformation, product technology and economic indicators greatly improved, Many of the new conditions to adapt to China''s national conditions and conducive to environmental protection, product quality improved significantly, basically to meet the rapid development of China''s power industry needs.


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