Core Loss Studies using FEM of a Three Phase Isolation Transformer under Harmonic Conditions

机译：谐波条件下使用三相隔离变压器的有限元法进行铁损研究

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This paper aims to investigate the effect of voltage harmonics on transformer core losses. A three-dimensional finite element method (FEM) is employed to model a three-phase isolation transformer supplied by a contaminated power source. The effect of harmonics is accurately modelled in FEM. The proposed model in FEM is verified by experiment where the results obtained using FEM show good agreement with experimental results. Different case studies with different harmonic conditions are investigated. The results show an increase in the core loss value up to 67.3% when the input voltage is formed based on the highest percentage of harmonic orders stated in the IEC 61000-3-6. As the core loss is always present, the energy loss continuously accumulates. Thus, voltage harmonics contribute to increase in the core loss in transformers.

机译：本文旨在研究电压谐波对变压器铁芯损耗的影响。使用三维有限元方法（FEM）对由污染电源提供的三相隔离变压器进行建模。谐波的影响已在FEM中精确建模。通过实验验证了所提出的有限元模型，其中使用有限元方法获得的结果与实验结果吻合良好。研究了在不同谐波条件下的不同案例研究。结果表明，根据IEC 61000-3-6中规定的最高谐波阶次形成输入电压时，铁芯损耗值最多可增加67.3％。由于铁心损耗始终存在，因此能量损耗会不断累积。因此，电压谐波会导致变压器铁芯损耗的增加。

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《International Conference on Power and Energy Systems》|2019年|1-5|共5页
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Majid Malekpour; Michael Larkin; Toan Phung;
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Core-loss studies; Finite element analysis; Isolation transformer; Transformer losses; Voltage harmonics;

机译：磁芯损耗研究;有限元分析;隔离变压器;变压器损耗;电压谐波;

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1. Effect Of Excitation Voltage Harmonics On The No-load Loss And Apparent Power Of A 3 Phase 3 Limb Transformer Core [J] . Manjunath. B. BALEHOSUR, Philip. MARKETOS, Anthony. J. MOSES Przeglad Elektrotechniczny . 2009,第1期

机译：励磁电压谐波对三相三臂变压器铁芯空载损耗和视在功率的影响
2. Modeling of magnetizing and core-loss currents in single-phase transformers with voltage harmonics for use in power flow [J] . Stensland T., Fuchs E.F. IEEE Transactions on Power Delivery . 1997,第2期

机译：具有电压谐波的单相变压器中的励磁和铁损电流建模，用于潮流
3. Vital Role of Transformer Core in Contribution of no load loss & excitation Harmonics of Distribution Transformers [J] . Somala Arjuna Rao, D Krishnamurthy, Gireesha S R Electrical India . 2011,第8期

机译：变压器铁芯在无载损耗和励磁谐波中的重要作用
4. Investigation of Core Loss and Flux distribution in single phase power transformers in Distorted Voltage Conditions based on 3-D FEM Method [C] . Ali Mousavi, Hosein Mohseni, AmirAbbas Shayegani Akmal, 11th International Conference on Electrical Machines and Systems（第11届国际电机与系统会议）论文集 . 2008

机译：基于3-D FEM方法的畸变电压条件下单相电力变压器铁心损耗和磁通分布的研究
5. A nonlinear lumped parameter model for transient studies of single-phase core form transformers. [D] . Vakilian, Mehdi. 1993

机译：用于单相铁芯形式变压器瞬态研究的非线性集总参数模型。
6. Two-phase flow visualization under reservoir conditions for highly heterogeneous conglomerate rock: A core-scale study for geologic carbon storage [O] . Kue-Young Kim, Junho Oh, Weon Shik Han, -1

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7. Decision-making is the process of analyzing information about a problem situation and comparing it to a specific conclusion in order to solve a specific problematic (Yıkılmaz, 2001; Miller and Byrnes, 2001). Decision-making styles are a mechanism that is influenced by the internal and external conditions that determine the direction of the decisions of the individual, the content of the decision-making process, and the outcome of the decision-making process (Payne, Bettman and Johson, 1993; Bavol’ár and Orosová, 2015). ACT is a contemporary member of the Cognitive Behavioral Therapy family. ACT (Acceptance and commitment therapy) has both similar and different directions with Behavioral Therapies and Cognitive Therapies (Herbet and Forman, 2011; Hayes, 2004). KKT responds to classical behavioral treatments using both existential and cognitive approaches in the analysis of behavior. KKT is a science wing that tries to solve human problems with a wider perspective aimed at solving problematic human behaviors (Plumb, Stewart, Dahl and Lundgren, 2009). It is seen that there is very little research about the new approach of ACT approach when the aiming country of our country is screened and it is thought that our country will contribute to the field of psychological counseling with the work done. In the scope of the research, experimental and control groups and preliminary test, post-test and follow-up measurements of 2x3 experimental design were used. The study's study group consists of a total of 24 (12 experimental and 12 control groups) university students studying in different departments and levels, continuing their education in the academic year of 2015-2016 in Ağrı province and İbrahim Chechen University in 2015-2016 academic year. The average age of participants in the experiment and control group is 20. There were 12 participants in the experimental group, 7 female and 5 male, and 12 participants, 7 female and 5 male in the control group. Personal Information Form and Decision Making Style Scale prepared by the researcher were used in the research. In order to decide on the tests to be used in the course of analyzing the data, the scores of the participant's Decision Styles Scale pre-test, which are placed primarily in the experimental and control groups, it was analyzed whether the basic expectations of parametric tests were answered. As a result of the analysis made, the scores, skewness and kurtosis coefficients obtained from the Decision Making Styles Scale were given to the experimental and control groups. It was determined that the distribution was normal in the result of Shapiro-Wilk test, in which the skewness and kurtosis coefficients of each sub-scale were ranked between -1 and +1. Participants in the experimental and control groups; homogeneity test results for decision-style pre-test measurements indicate that the data are homogeneous. According to the results of the Mauchly Globalness Test, it has been determined that working supports the hypothesis. It was determined that there was no significant difference between the pre-test scores obtained from dependent decision-making style of experiment and control groups, but the test group showed lower mean scores at the significant level within the scores of post-test and follow-up tests. Therefore, it can be said that the ACT-oriented psychoeducation program applied to the experimental group reduces the dependent decision-making style scores from the decision style sub-dimensions and the psychoeducation program has a lasting effect. 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机译：决策是分析有关问题情况的信息并将其与特定结论进行比较的过程，以解决特定的问题（Yıkılmaz，2001; Miller和Byrnes，2001）。决策风格是一种机制，受到内部和外部条件的影响，确定个人决定的方向，决策过程的内容以及决策过程的结果（PAYNE，BETTMAN和BEDNE） Johson，1993;Bavol'ár和奥萨洛瓦，2015）。法案是认知行为治疗家庭的当代成员。行为（验收和承诺治疗）具有与行为疗法和认知疗法的类似和不同方向（Herbet和Forman，2011; Hayes，2004）。 KKT在分析行为中使用存在性和认知方法来响应古典行为治疗方法。 KKT是一个科学翼，试图解决人类问题，旨在解决有问题的人类行为（铅垂，斯图尔特，Dahl和Lundgren，2009）。有人认为，当我们国家的瞄准国家进行筛选时，有关行动方法的新方法几乎没有研究，并且认为我们的国家将为完成工作做出贡献的心理咨询领域。在研究的范围内，使用实验和对照组和初步测试，使用后测试和后续测量的2x3实验设计。该研究的研究小组包括共24名（12个实验和12个对照组）大学学生在不同的部门和水平上学习，在2015-2016学术上继续进行2015-2016的学术年度2015-2016学年年。实验和对照组参与者的平均年龄是20.实验组中有12名参与者，7名女性和5名男性，12名参与者，7名女性和5名男性。研究人员准备的个人信息表格和决策制定风格规模在研究中使用。为了决定在分析数据的过程中使用的测试，参与者的决策风格刻度预测的分数主要在实验和对照组中进行，分析了参数的基本期望吗？测试得到了回答。由于对实验和对照组给出了从决策曲调标度获得的分数，偏移和峰度分子系数。确定该分布是正常的在成熟的-WILK试验结果中，其中每亚级的偏差和刚度系数在-1到+1之间排名。实验和对照组的参与者;决策式预测测量的同质性测试结果表明数据是均匀的。根据毛毛环保试验的结果，已确定工作支持假设。据确定，从依赖决策风格的实验和对照组获得的预测分数之间没有显着差异，但测试组在测试后的分数内显示出较低的平均分数和后续的分数 - 测试。因此，可以说，应用于实验组的面向活动的心理教育程序减少了决策风格子维度的依赖决策风格分数，并且心理教育程序具有持久的效果。据确定，从实验和对照组自发决策风格获得的预测试，测试后和后续评分之间没有显着差异。因此，可以说这种情况不会导致从应用于实验组的活动导向的心理教育程序的决策风格分数的自发决策风格分数显着差异。行为的心理教育计划在个人直观的决策风格下降，但这种减少并没有产生显着的差异。因此，可以说，这种情况不会在从应用于实验组的KKT导向的心理教育程序的决策风格分数中产生有意义的决策风格分数。从实验和对照组的理性决策风格获得的预测分数显示后检验后和随访评分之间存在差异，但这种差异并不重要。由于分析，确定测试组的理性决策风格较高，而不是后测试和后续分数的预测分数，而对照组合理决策风格的后测试和后续测试分数显示出与预测试分数相比的减少。预测分数。决策款式扩展避免决策由于分析了预测试，测试后和后续措施的班次评分的平均分数，发现群体效应是微不足道的。确定实验和对照组从避免决策风格获得的预测评分中显着不同，但在测试后和后续测试的分数内没有显示出任何重大变化。

Core Loss Studies using FEM of a Three Phase Isolation Transformer under Harmonic Conditions

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