受直流偏置影响的变流器变压器的强化热力学建模

IF 1.8 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC
Suman Yadav;Gourav Kumar Suman;Ram Krishna Mehta
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引用次数: 0

摘要

高压直流变压器中的直流偏压是由变流器运行和直流输电引起的,这对变压器的性能提出了重大挑战。直流偏压的有害影响主要表现为温度升高,危及变压器的安全运行。本文通过扩展热等效电路 (TEC) 的使用范围,提出了一种新方法,以准确预测直流偏置条件下换流器变压器不同元件的温度。热等效电路专为 240 MVA 变流器变压器设计,将电容和动态电阻作为模型参数。此外,还采用了电热有限元模型,以全面分析变压器在不同直流偏置水平下的行为。为了估算 TEC 参数,采用了基于测量值的混合 GWO-CS(灰狼优化-布谷鸟搜索)算法。此外,考虑到老化加速因素,本文还强调了直流偏压对转换变压器预期寿命的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Enhanced Thermodynamic Modeling of Converter Transformer Influenced by DC Bias
DC bias in high-voltage DC transformers, arising from converter operations and DC transmission, poses significant challenges to their performance. The detrimental effects of DC bias primarily manifest in increased temperature, jeopardizing the safe operation of the transformers. This article presents a novel approach by extending the utilization of the Thermal Equivalent Circuit (TEC) to accurately predict temperatures at different elements of a converter transformer under DC bias conditions. Specifically designed for a 240 MVA converter transformer, the TEC incorporates capacitances and dynamic resistances as model parameters. Additionally, an electro-thermal finite element model is implemented to comprehensively analyze the transformer's behavior under varying levels of DC bias. To estimate the TEC parameters, a hybrid GWO-CS (Grey Wolf Optimization – Cuckoo Search) algorithm is employed based on measured values. Furthermore, the paper highlights the impact of DC bias on the converter transformer's life expectancy, considering the aging acceleration factor.
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CiteScore
4.30
自引率
0.00%
发文量
27
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