常州干式变压器：常州干式变压器绕组的电气 耐热 机械强度

常州干式变压器绕组的电气 耐热 机械强度 　　
常州干式变压器绕组是常州干式变压器的重要组成部分.也可以说是常州干式变压器的心脏。绕组是常州干式变压器的电路，它完成电能的传输和转换。在频率不变的倩况下一次绕组将系统的电能引入常州干式变压器中，二次绕组将电能传输出去，因此常州干式变压器绕组是传输和转换电能的静止设备。
绕组结构决定了常州干式变压器的额定容量、电压等级和使用条件。
绕组由导线(铜线或铝线)和绝缘等构成，当额定电流小时采用圆导线;额定电流大时采用扁导线。常州干式变压器的电压等级多数为10、35kV，有的厂家己试制了110kV的产品。绕组根据导线排列方式及其绝缘的耐热等级，而采用B,F,H级的圆、扁漆包线、Nomex纸包线.双玻璃丝包线及双玻璃丝漆包线及双玻璃丝薄膜包线等。导线表面的绝缘漆、Nomex纸和玻璃丝等称为导线绝缘或匝绝缘。
常州干式变压器绕组由于采用了高耐热等级的绝缘材料.因而具有难燃性的特点。
需要指出，绕组导线穿过铁心窗口一次.即与铁心中磁通交链一次称为一匝。对浸渍式绕组而言，多匝导线沿绕组轴向排列组成线段，绕组即由多个线段组成，线段间用相应耐热等级的绝缘垫块隔开;对于树脂绝缘的常州干式变压器的高压绕组采用分段层式绕组.层间以适当厚度的绝缘及带胶玻璃丝构成的层间绝缘，有的层间绝缘采用了OMO或DMD薄膜绝缘。内外绕组的包封绝缘则采用绝缘胶或带胶玻璃丝构成。
常州干式变压器绕组通过电流产生电阻损耗。常州干式变压器的负载损耗由电阻损耗及绕组导线中的附加损耗构成。损耗及其产生的温升必须满足标准要求，为此绕组计算应在满足负载损耗、短路阻抗、温升及绕组在短路电流作用下产生的电动力.并核算常州干式变压器构件的机械强度的情况下，确定绕组尺寸和选定导线规格尺寸，为此绕组计算应满足以下要求：
1.电气强度
绕组绝缘必须满足《常州干式变压器》(GB6450-1986 )规定的工频、雷电冲击试验电压要求，并留有一定的裕度。
2.耐热强度
在负载运行条件下，绕组温升不允许超过绝缘材料耐热等级所规定的温升限值。
3.机械强度
常州干式变压器绕组在短路电流作用下，所产生的电动力使绕组的位移及短路阻抗变化应满足《常州干式变压器 第五部分 承受短路的能力》(GB 1094.5-1985 )要求，并无损坏。
常州干式变压器绕组，在绕制工艺上应该力求简单、方便和节省工时。
此外，常州干式变压器，特别是树脂绝缘于式常州干式变压器应确保免维修，产品设计应力求损耗低和制造成本低。

Dry-type transformer winding
The dry-type power transformer winding is an important part of the dry type power transformers can also be said to be the heart of the dry type power transformers. Winding dry type power transformers, circuit, it has completed the transfer and conversion of electrical energy. The primary winding power system electrical energy into the transformer secondary windings will transmit the electricity went out, dry-type power trans企业账号：1611 0032 092 00213 086former winding is stationary equipment for transmission and conversion of electrical energy in the Qian cases the same frequency.
The winding structure of the rated capacity of the dry type power transformers, voltage level and conditions of use.
Winding wires (copper or aluminum), and insulation structure, when the hours of rated current round wire, flat wire; rated current. The voltage level of the dry type power transformers, most of 10,35 kV, and some manufacturers have been trial 110kV products. Winding according to the wire arrangement insulation of the heat levels, while the use of B, F, H-class round, flat enameled wire, Nomex paper covered wire. Double glass envelope and double glass enameled wire and double glass film wrapped lines. The surface of the wire insulation paint, Nomex paper and glass as wire insulation, turn insulation.
Dry-type power transformer windings due to a high heat insulating material and thus has a flame resistance characteristics.
It should be noted that the winding wire through the core window and the iron hearts of flux cross-linked once called a turn. Impregnated winding many turns of wire along the winding axial arrangement composed of line segments, winding by a number of line segments, line segments between corresponding heat level of insulation pads separated; resin insulation dry-type power transformers, high voltage windings are segmented layer winding layer insulation consisting of the appropriate thickness of insulation and adhesive glass interlayer some insulation between the layers using the OMO or DMD film insulation. The encapsulation of the inside and outside the winding insulation is insulating plastic or with plastic glass composition.
Dry-type power transformer winding current resistive losses. The transformer load loss by the resistive losses and additional losses in the winding wire. Loss and temperature rise must meet the standard requirements of this winding calculation should meet the load loss, short-circuit impedance, temperature rise and winding short-circuit current under-powered. And accounting for the mechanical strength of the dry type power transformer components circumstances, to determine the winding size and selected wire size specifications winding, this calculation should meet the following requirements:
(1) electric strength
Winding insulation must meet the work of the "dry-type power transformers" (GB6450-1986) provides frequency, lightning impulse test voltage requirements, and leave some margin.
(2) heat intensity
Load operating conditions, the winding temperature rise must not exceed the temperature rise limits of heat-resistant grade of insulating materials.
(3) the mechanical strength
Dry-type power transformer windings under short-circuit current generated by the electric power to the winding displacement and short-circuit impedance changes to Part V of the power transformer to withstand short circuit capacity (GB 1094.5-1985) shall meet the requirements, there is no damage.
Dry-type power transformer windings on the winding process should be simple, convenient and time saving.
In addition, dry-type power transformers, resin insulation in power transformers shall ensure maintenance-free, product design should strive for low loss and low manufacturing costs.

更多常州干式变压器资讯：上海常州干式变压器厂家常州干式变压器产品常州干式变压器资讯