超高压变压器线圈分区绝缘结构设计的优化算法

An Optimization Algorithm for the Graded Insulation Design of EHV Transformer Windings

提出了大型超高压变压器线圈分区绝缘结构设计的优法算法。该算法以离散 变量优化方法为基础，通过调整分区线圈类型和分区长度，使入波绕组的起始电压分布 满足给定的对地电位或油道电压的限制，且尽可能接近最终电压分布，以减弱线圈内部 的电压振荡。此外，还提出一种快速计算起始电压分布的方法，使联立求解节点电压方 程的规模显著减少。

In this paper an optimization algorithm is presented for the graded insulation design of large EHV transformer windings each of which is divided into several coil parts. The algorithm is based on discrete optimization. For each step of the optimization, either the type of coil parts or the length of coil parts may be changed. The algorithm can provide several optional designs, in which the initial voltage distribution satisfies the node voltage constraints or the duct voltage constraints at each coil part and the difference between initial voltage distribution and final voltage distribution can be minimized as well. The paper presents also a time-saving computation method to calculate the initial voltage distribution in which only those equations associated with the changed coil part have to be solved simultaneously.