苏州干式变压器：苏州干式变压器绕组的等值电路

苏州干式变压器绕组的等值电路 　　
苏州干式变压器从一种状态过渡到另一种状态称为过渡过程，由于过渡过程时间很短也称为顺变过程。如由正常电压过渡到雷电过电压等。在苏州干式变压器中还有其它过渡过程。
苏州干式变压器联结于系统中，因而系统中产生的过电压必然传播到联结于其上的苏州干式变压器的绕组中.并在其中引起复杂的波过程，尤其是在雷电过电压作用下，沿绕组的起始电压分布是不均匀的，有时甚至引起振荡过程。这对苏州干式变压器绝缘.特别是对于绕组的纵绝缘是很不利的。为此在苏州干式变压器绝缘结构中，了解作用于绕组纵绝缘上在雷电冲击波作用下.苏州干式变压器绕组波过程中各点对地电位，绕组中相邻两元件(线匝、层间及线段间)的电位差。绕组首端到某一点的电位差.即梯度电压等，对于确定合埋的纵绝缘结构具有实际意义。
对于苏州干式变压器而言，由于联结于系统的末端，雷电过电压经过系统和其它电气设备，其幅值将有所衰减。
由于浸渍式苏州干式变压器、浇注和绕包绝缘苏州干式变压器绕组结构型式的不同，浸渍式苏州干式变压器的绕组多为连续式、螺旋式；而浇注绝缘和绕包绝缘苏州干式变压器的高压绕组多为分段层式，因此绕组波过程的等位电路、计算参数等均有所不同。在雷电冲击作用下，绕组应为具有分布参数电路，其中电感、电容和电阻均为分布参数。为了分析方便.传统方法是将分布今数化为集中参数求解。


Winding equivalent circuit
The dry type power transformers transition from one state to another state is called the transition process, also known as a very short time of the transition process a smooth change process. Transition from normal voltage to lightning overvoltage. Dry-type power transformers transition process.
Dry type power transformers coupling the power system, and thus the power system over-voltage must be spread to the links on which the dry-type power transformer winding and which lead to complex wave process, especially the role of lightning over voltage the threshold voltage distribution along the winding, uneven, and sometimes even cause oscillat邮 箱：1262980066@qq.comion process. This dry-type power transformer insulation, especially for the vertical of the winding insulation is very unfavorable. This dry type power transformer insulation structure, understanding the role of lightning shock wave on the vertical insulation of the winding transformer winding process on the ground potential, winding two adjacent elements (turns, between layers and segments ) the potential difference. Winding first end to a point of potential difference gradient voltage has practical significance for ascertaining buried longitudinal insulation structure.
, Since the end of the links in the power system for the dry type power transformers, lightning over-voltage through the system and other electrical equipment, its amplitude will be attenuation.
Impregnated dry type power transformers, cast and wrapped with insulation dry-type power transformer winding structure type, impregnated dry type power transformer windings are mostly continuous, spiral; pouring insulation and wrapped insulation dry-type power transformers the high voltage winding multi-segment layer type winding wave process equipotential circuit, calculation parameters, etc. is different. Lightning impulse under the winding should be to have the distributed parameter circuit including inductors, capacitors and resistors are distribution parameters. In order to facilitate the analysis of traditional methods will be distributed this number into centralized Parameter Solution.

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