Influence of the type of load graphs on the service life transformers 33/11 Kv at substation "Kabun-1" (Syrian Arab Republic)

E. Y. Abdullazyanov, E. Gracheva, A. Alzakkar, S. Valtchev, N. Mestnikov
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Abstract

Power transformers are one of the main components of power supply systems needed to reliably supply electricity to consumers. As we know, the value of the allowable load of transformers is determined by the value of the allowable heating of structural elements, on which the service life of transformer period depends. Reliable data on the technical condition of the structural elements of transformers is the decisive information for making decisions on the replacement and maintenance of transformers. METHODS. To assess the service life of transformers, methods were used to evaluate the statistical parameters of consumer load graphs, load factors and the heating temperature of the windings of transformers with a capacity of Sn.T = 20 MVA, a voltage of 33/11 kV at substation Kabun-1. THE AIM. The aim of the work is to evaluate the service life of the transformers at substation Kabun-1 (Syrian Arab Republic) with various options for the type of load power consumption graph (first; second; third). THE RESULTS. The main statistical parameters of the characteristics of the original and proposed options of load power graphs (active, reactive and apparent) per day of transformers, the main electrical consumer of which is the spinning and weaving factory, are determined. Approximating functions of daily graphs of power loads of transformers, from which the spinning and weaving factory receives power (first and second approximations), have been developed. It is proved that with the considered options for shifting the time of the start of work of electrical consumers - with the third option -the maximum load power is reduced by 12.8%, load variation is reduced from 0.33 to 0.17 in relation to the second option for the subdivisions of the spinning and weaving factory. It has been established that for all the considered options, the average value of the load power of the transformers at substation Kabun-1 is constant. The laws of change in the relative value of the service life of transformers during the implementation of various technical measures are determined.
“Kabun-1”变电站负荷图类型对33/11 Kv变压器使用寿命的影响(阿拉伯叙利亚共和国)
电力变压器是向用户可靠供电所需的供电系统的主要部件之一。我们知道,变压器的许用负荷的大小是由结构元件的许用发热值决定的,而变压器的使用寿命取决于结构元件的许用发热值。变压器结构元件技术状况的可靠数据是制定变压器更换和维修决策的决定性信息。方法。为了评估变压器的使用寿命,采用了对容量为Sn的变压器的用户负荷图统计参数、负荷因子和绕组加热温度进行评估的方法。T = 20 MVA, Kabun-1变电站电压为33/11 kV。的目标。本工作的目的是评估Kabun-1(叙利亚阿拉伯共和国)变电站变压器的使用寿命,并采用各种负载功耗图(第一;第二个;第三)。结果。确定了以纺织厂为主要用电量的变压器每日负荷功率图(有功、无功和表观)的原始和建议选项的主要统计参数。提出了纺织厂用电的变压器日负荷图的近似函数(第一次近似和第二次近似)。结果表明,考虑到电力用户开始工作的时间的变化,在第三种情况下,最大负荷功率减少了12.8%,与第二种情况相比,纺纱厂和织布厂的负荷变化从0.33减少到0.17。确定了在所有考虑的方案中,Kabun-1变电站变压器负荷功率的平均值为常数。确定了各种技术措施实施过程中变压器使用寿命相对值的变化规律。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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