舟山干式变压器：舟山干式变压器设计制造中的几个问题

舟山干式变压器设计制造中的几个问题 　　
1.舟山干式变压器取代油浸式舟山干式变压器
油浸式配电舟山干式变压器，其显著的优点和低成本是其他舟山干式变压器难以取代的。在户外以及防火要求一般的场所，目前及今后较长一段时间内，将仍以油浸舟山干式变压器为主。但对防火要求高的场所，采用干式或难燃液、不燃液的舟山干式变压器，也是油浸舟山干式变压器无法取代的。

2.铝、铜箔比较
几种材料的线膨胀系数见，铝箔的线膨胀系教与树脂加石英粉的线膨胀系数比较接近。所以国外树脂加石英粉的浇注舟山干式变压器，其导线多用铝箔，价格也比较便宜.而铜箔与树脂加玻璃纤维的线膨胀系数更接近，但铜箔舟山干式变压器价格要比铝箔的贵20%—30%，因此，国外优先用铝箔制造舟山干式变压器。

3.加石英粉与不加石英粉舟山干式变压器
这两种结构性能标准一样。安装尺寸也一样，只是不加石英粉的变压.价格比加石英粉的高10% -15%.谁优谁劣，尚未定论。

4.拢短路能力
国内树脂浇注舟山干式变压器已有100多台做过短路试脸，其抗短路能力是好的。

5.过负载能力
舟山干式变压器较油浸式舟山干式变压器过负载能力高，主要是舟山干式变压器选用的电流密度较低，热容量大，绕组时间常数大。

6.绝缘水平
在GB6450-1986《舟山干式变压器》标准中，规定了舟山干式变压器的绝缘水平，而与油浸式舟山干式变压器有所不同：
舟山干式变压器与油浸式舟山干式变压器相比.绝缘运行条件要求较低。因油浸式舟山干式变压器的使用场所城市和农村均能使用，常安装在户外运行，而[cit华盈非晶合金变压器有限公司是具备生产220KV电压等级变压器的现代化机械制造企业，公司注册资本8800万元，现有员工300余人，占地面积300余亩，公司拥有各种生产和使用设备100余台，产品工艺水平高，检测设备齐全，企业管理严格，产品质量可靠。求精务实，开拓创新，为用户提供完美的变压器解决方案，满足各层次客户的需求。主要产品有非晶合金变压器，干式变压器，SH15-M系列非晶合金变压器，非晶合金铁芯配电变压器，SCRBH15非晶合金干式变压器，SGBH15非晶合金变压器（10KV级），SCRBH15非晶合金卷铁芯干式变压器，35kv非晶干变变压器 35kv非晶油变变压器，超强过载能力变压器、电力变压器、油浸式变压器、矿用变压器、整流变压器、电炉变压器、特种变压器、等等，并提供新能源发电的升压及并网解决方案。我公司除生产以上10多个系列200多个品种，600多种规格的变压器外，还向用户提供非标特种产品的设计、制造。以上产品符合GB1094、GB/T6451、GB6450标准和等效IEC（国际电工委员会）标准。yname]干式变压器的供电范围较小，只安装在户内运行。

7.发展展望
1)舟山干式变压器特别是浇注舟山干式变压器，在十多年来有了很大的发展，它占配电舟山干式变压器的比例，会接近达到20%左右。由于其价格比油浸式舟山干式变压器高出一倍，会影响发展，因此，降低成本是关键的因素。目前树脂舟山干式变压器所用的树脂及其他材料大部分靠进口，因而售价较高。如优先选用国产材料，这样总体成本会降低。
2)从结构上看。玻璃纤维加强的薄绝缘结构是我国舟山干式变压器的一种发展趋势，舟山干式变压器温控系统和辐流式风机的使用会更受欢迎。

Dry-type transformers manufactured in several issues

1 dry-type transformers instead of oil-immersed transformer
Oil-immersed distribution transformers, the significant cost advantages and other difficult to replace the transformer. Outdoor and general fire safety requirements in place, now and for a long period of time, would remain the main oil-immersed transformers. But the fire protection requirements of high places, the use of dry or fire resistant fluids, non-flammable liquid transformers, transformer oil also can not be replaced.

2 aluminum, copper more
Coefficient of linear expansion of several materials see, aluminum foil and resin, Department of linear expansion increase the linear expansion coefficient of quartz powder closer. So foreign cast resin transformer plus quartz powder, the wire multi-purpose aluminum foil, the price is relatively cheap, while the copper foil with resin and glass fiber linear expansion coefficient is closer, but the transformer price of copper foil expensive than the 20% -30% Therefore, the priority of foreign manufacture transformers with aluminum foil.

3 plus quartz powder and quartz powder without transformer
Like these two structural performance criteria. Installation size is the same, but without quartz powder transformer. Price plus quartz powder by 10% -15%. Who is superior, not yet conclusive.

4 Long short-circuit capability
China has been cast resin transformer short circuit test done more than 100 face, the short circuit capacity is good.

5 overload capability
Dry-type transformers than the oil-immersed transformer is too high load capacity, dry-type transformers are mainly used in low current density, heat capacity, time constant winding large.

6 insulation level
In GB6450-1986 "dry-type power transformers," standard, provides the level of insulation dry-type transformers, oil-immersed transformers with different:
Dry-type transformers, compared with oil-immersed power transformers, insulation less demanding operating conditions. Due to the use of oil-immersed power transformers can use in urban and rural sites, often installed in the outdoor run, and dry-type transformers power supply range of smaller, only installed in the indoor run.

7 Prospect
1) dry-type transformers, especially cast dry-type transformers, in ten years has been greatly developed, which accounts for the proportion of distribution transformers, will be close to 20%. Because of its price twice than oil-immersed transformer, will affect the development, and therefo传 真：0635-8888109re, reduce costs is the key factor. Currently resin dry-type transformers used in resins and other materials, most of the imported, and thus higher prices. Such as the priority use of domestic materials, this will reduce the overall cost.
2) From a structural point of view. A thin glass fiber reinforced insulation dry-type transformers in China of a trend, dry-type transformers and radial-flow temperature control system using fans will be more popular.

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