SOLVING EMC PROBLEMS IN THE DESIGN OF NEW HV TEST LABORATORY

机译：解决新的高压测试实验室设计中的EMC问题

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The paper deals with solving electromagnetic compatibility (EMC) problems in the design of a new, case study, industrial high voltage test laboratory, intended to be used for testing of transformers and other apparatus up to 550 kV rated voltage. Modern high voltage test facilities are equipped, apart from primary test devices like AC, DC and impulse voltage generators etc., also with sophisticated numerical measuring instruments and informatics technology. Since such devices are sensitive to transient overvoltages, the highest degree of EMC is to be secured. This can be achieved by proper earthing and screening of test laboratory, what shall be designed in a way to satisfy all requirements conditioned by building lightning protection, personal protection and system earthing, avoiding electromagnetic compatibility disturbances at the same time. One of the main tasks is solving electromagnetic compatibility problems caused by outdoor electromagnetic disturbances originating from various unknown sources. Those disturbances and interferences may seriously influence measuring accuracy and readings of test devices, what consequently leads to false results. The stated is especially relating to partial discharge measurements. As to avoid such disturbances, the laboratory shall be completely screened with a net forming optimally designed Faraday cage. On the other hand, at high voltage tests with impulse voltages, especially with chopped tail waves, steep transient overvoltages may be generated. As a consequence, high transient potential differences between particular points along the earth electrode may occur, what can even lead to flashovers between parts of it. Therefore is of utmost importance to provide proper earthing and low inductance current return path for impulse high voltage test equipment where high frequency transients are to be anticipated. Improper earthing and bonding may result, apart from mentioned flashovers, in severe induced voltages in secondary cables with consequential influence on test results, possible destruction of measuring instruments and hazardous touch voltages for personnel. For analyzing transient potential differences, it is important to model, with maximum accuracy, impulse test circuit (impulse generator, chopping spark gap, voltage divider, Faraday cage, fundament earth electrode, earthing strips, earthing rods etc.). Magnitude of transient potential difference between particular points is proportional to earth electrode inductance, i.e. low inductance of earth electrode will result in decrease of transient potential difference.

机译：本文旨在解决新的案例研究工业高压测试实验室的设计中的电磁兼容性（EMC）问题，该实验室旨在用于测试额定电压高达550 kV的变压器和其他设备。除了交流，直流和脉冲电压发生器等主要测试设备外，还配备了现代化的高压测试设备，还配备了先进的数字测量仪器和信息技术。由于此类设备对瞬态过电压敏感，因此必须确保最高程度的EMC。这可以通过对测试实验室进行适当的接地和屏蔽来实现，其设计应满足建筑物防雷，人身保护和系统接地的所有要求，同时避免电磁兼容性干扰。主要任务之一是解决由各种未知源引起的室外电磁干扰引起的电磁兼容性问题。这些干扰和干扰可能会严重影响测量精度和测试设备的读数，从而导致错误的结果。该声明尤其涉及局部放电测量。为了避免此类干扰，应使用网状结构优化设计的法拉第笼对实验室进行全面筛查。另一方面，在具有脉冲电压的高压测试中，尤其是在斩波的尾波情况下，可能会产生陡峭的瞬态过电压。结果，沿接地电极的特定点之间可能会出现高瞬态电势差，甚至会导致其各部分之间发生飞弧。因此，为预期发生高频瞬变的脉冲高压测试设备提供适当的接地和低电感电流返回路径至关重要。除上述闪络外，不正确的接地和粘结还可能导致次级电缆中产生严重的感应电压，进而影响测试结果，可能损坏测量仪器以及对人员造成危险的接触电压。为了分析瞬态电势差，重要的是要以最大的精度建模脉冲测试电路（脉冲发生器，斩波火花隙，分压器，法拉第笼，基本接地电极，接地条，接地棒等）。特定点之间的瞬态电势差的大小与接地电极的电感成正比，即，接地电极的低电感将导致瞬态电势差的减小。

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来源
《Transient phenomena in large electric power systems》|2007年|p.1-6|共6页
会议地点 Zagreb(HR)
作者
Ivo Ugle?i?; Miroslav K?epela; Viktor Milardi?;
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作者单位

University of Zagreb, Faculty of Electrical Engineering and Computing, Unska 3rn10000 Zagreb, Croatia, ivo.uglesic@fer.hr;

EXOR d.o.o., Bani 73Arn10010 Zagreb, Croatia;

University of Zagreb, Faculty of Electrical Engineering and Computing, Unska 3rn10000 Zagreb, Croatia;

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会议组织
原文格式 PDF
正文语种 eng
中图分类输配电工程、电力网及电力系统;
关键词
EMC; earthing; bonding; transient; disturbance; testing; measuring;

机译：EMC;接地;粘结;瞬态;干扰;测试;测量;

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1. Nonunit protection technique for EHV transmission systems based on fault-generated noise. Part 3: Engineering and HV laboratory testing [J] . Aggarwal R.K., Johns A.T. IEE proceedings. Part C . 1996,第3期

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2. Zinc Oxide Sheath Voltage Limiter for HV and EHV Power Cable: Field Experience and Laboratory Tests [J] . Parmigiani B., Quaggia D., Elli E., Power Engineering Review, IEEE . 1986,第1期

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3. Multifrequency HV Capacitive Load Direct Switching Tests in Laboratories Having a Single Frequency Power Supply [J] . Aldrovandi G., Furioli G., Romiti A. Power Engineering Review, IEEE . 1983,第7期

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4. SOLVING EMC PROBLEMS IN THE DESIGN OF NEW HV TEST LABORATORY [C] . Ivo Uglesic, Miroslav Krepela, Viktor Milardic CIGRE ZAGREB Symposium on Transient Phenomena in Large Electric Power Systems . 2007

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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. It was determined that there was no significant difference between pre-test, post-test and follow-up scores obtained from the Spontaneous-Instant Decision Style of experiment and control groups. Thus, it can be said that this situation does not cause a significant difference in the Spontaneous-Decision-Making Style scores from the decision style sub-dimensions of the ACT-oriented psychoeducation program applied to the experimental group. The ACT -oriented psychoeducation program had a decline in the intuitive decision-making styles of the individuals, but this decrease did not create significant differences. Thus, it can be said that this situation does not make a meaningful difference in the intuitive decision style scores from the decision style sub-dimensions of the KKT oriented psychoeducation program applied to the experimental group. The pre-test scores obtained from the rational decision-making style of the experimental and control groups showed that there was a difference between the post-test and the follow-up scores, but this difference was not significant. As a result of the analysis, it was determined that the test group had higher levels of rational decision style than the pre - test scores in the post test and follow - up scores, whereas the post test and follow - up test scores in the control group rational decision style showed a decrease compared to the pre - test scores. the pre - test scores. Decision-making Styles Scale Avoidant Decision Making As a result of the analysis of the mean scores of the subscale scores of pre-test, post-test and follow-up measures, the group effect was found to be insignificant. It was determined that the experimental and control groups differed significantly from the pre-test scores obtained from the avoidant decision-making style but did not show any significant change within the scores of the post-test and follow-up tests. [O] . mustafa ercengiz, ali haydar şar 2018

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SOLVING EMC PROBLEMS IN THE DESIGN OF NEW HV TEST LABORATORY

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