Assessment and Protection of Electromagnetic Fields Generated from Electric Power Systems

电力系统产生的电磁场的评估和保护

• 批准号: 07455122
• 负责人: KAWAMURA Tatsuo
• 金额: $ 4.54万
• 依托单位: Shibaura Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07455122/
• 关键词: electric power system; electric field; magnetic field; electromagnetic field; electric installation; environment

The research project has been carried out according to the scheme specified at first. The obtained results are as follows.Concerning the electric field generated from electric power systems and the induction current through a human body caused by this field, analytical calculations on the current distribution through a model of the body were carried out and the results of the analysis were shown in good agreement with experimental results. Also, induction current density through a spherical model of the human body and effects of the non-uniformity of the magnetic flux density to the induced electric field in the model have been clarified.With regard to the magnetic field with power frequency, magnetic fields in and outside a gas insulated transmission line of single phase and three phases configurations were investigated experimentally taking into account the eddy current. Environment concerning the magnetic field near the transmission line were assessed by the obtained data. The data … More were compared with the theoretical analysis. Also, environment of the magnetic field near the electric power apparatus and its improvement were investigated.Concerning the interference due to the noise by corona discharge, Walsh transform was applied to the waveform of the corona discharge and obtained spectrum was investigated. The spectrum has shown in good correlation with the deterioration of the insulation oil. This result shows that this method is effective for the diagnosis of the deterioration of the insulating oil. Moreover, the site location of the corona discharge in insulation oil using radiated electromagnetic wave were investigated and it has been shown that this method is useful for the diagnosis of the insulation deterioration in oil.The Image processing technique has been applied in the analysis of the progressing of the corona discharge in air under DC high voltage. The results show that this method is very useful for the analysis of the progressing of the corona under the environmental condition of air flow. The assessment of the environment for corona discharge with different conditions of air flow was investigated. Also, the chaos theory was applied in the analysis of the corona discharges and confirmed its effectiveness. Less

研究项目已按照最初确定的方案进行。根据电力系统产生的电场及其产生的人体感应电流，对人体模型中的电流分布进行了解析计算，分析结果与实验结果吻合较好。阐明了人体球形模型中的感应电流密度以及磁通密度的不均匀性对模型中感应电场的影响。针对工频磁场，在考虑涡流的情况下，对单相和三相结构的气体绝缘传输线内外的磁场进行了实验研究。通过获得的数据对输电线路附近的磁场环境进行了评估。《The Data…》更多的与理论分析进行了比较。针对电晕放电产生的噪声干扰，对电晕放电的波形进行沃尔什变换，得到频谱。谱图与绝缘油的劣化程度有很好的相关性。结果表明，该方法对绝缘油劣化的诊断是有效的。利用辐射电磁波对绝缘油中电晕放电的位置进行了研究，结果表明该方法可用于油中绝缘劣化的诊断，并将图像处理技术应用于直流高压空气中电晕放电过程的分析。结果表明，该方法对于分析气流环境下的电晕过程是非常有用的。对不同气流条件下的电晕放电环境进行了评价。并将混沌理论应用于电晕放电的分析，验证了其有效性。较少

项目成果

M.Siregar,N.Hayashi,J.Hashimoto,K.Isaka: "Induced Current Characteristics of Square Probe Phaced at Ground Level in a Parallel DC and AC Lines-to-Plate Electrode System" Proceedings of the Institute of Electrostatics Japan. 20. 238-246 (1996)

M.Siregar、N.Hayashi、J.Hashimoto、K.Isaka：“平行直流和交流线对板电极系统中方形探针在地面定相的感应电流特性”日本静电研究所论文集。

K. Okumura, T. Kawamura, et al.: "Development of the Failure Diagnosis Techniques for HV Oil-filled Transformers by using the Corona Discharge Noise" Proceedings of the Ninth International Symposium on High Voltage Engineering. S5. 5641-1-5641-4 (1995)

K. Okumura、T. Kawamura等人：“利用电晕放电噪声开发高压油浸式变压器故障诊断技术”第九届国际高压工程研讨会论文集。

K. Okumura, T. Kawamura, et al.: "Measurements of Fluctuation and Pluse Waveform of DC negative Corona Pulse with Needle to Plane Gap in Air Flow" Proceedings of the Eleventh International Conference on Gas Discharges and Their Applications. I. I-124-I-12

K. Okumura、T. Kawamura 等人：“测量气流中针与平面间隙的直流负电晕脉冲的波动和脉冲波形”第十一届气体放电及其应用国际会议论文集。

H.Tarao, N.Hayashi, K.Isaka: "Impedance Method for Calculation of Induced Electric Field inside the Biological System Exposed to ELF Magnetic Field" Bulletin of Faculty of Engineering, The University of Tokushima. No.41. 69-77 (1996)

H.Tarao、N.Hayashi、K.Isaka：“暴露于 ELF 磁场的生物系统内感应电场的阻抗计算方法”德岛大学工学院通报。

M.Taguchi, K.Okumura, T.Kawamura: "Diagnostic Method of Deterioration of Insulation Oil using Walsh Transform" Journal of the Japan research Group of Electrical Discharges. No.153. 60-63 (1996)

M.Taguchi、K.Okumura、T.Kawamura：“使用沃尔什变换的绝缘油劣化诊断方法”日本放电研究组杂志。