Location and Modeling of VHF/UHF Electro Magnetic Wave Radiated from Power Apparatus

为了事先知道绝缘子等绝缘设备会因退化而损坏，并引起事故，提出了应对方法，并对各种通信系统的干扰波进行了保护，确定了保持良好通信状态的基本数据。然后，在平成12财年中，由于长期劣化等原因，从配电绝缘子发射的VHF频段进行了两个或两个以上的广域天线接收，并通过获得时滞法对噪声进行了位置定位。由于与背景噪声相比，通常从劣化状态的绝缘子发射的电磁波是伴随局部放电的事物。用小幅度感应是不容易的。近年来在信号处理领域得到了更大的发展，研究将主动小波变换应用于信号处理，大大提高了信噪比。此外，由于该技术在现场使用时考虑到存在两个或两个以上的退化绝缘子，并且一个波的来源不止一个，因此提出了能够假定一部分的两个或两个以上的方法电源产生位置的测量方法和方法，并通过仿真实验进行了验证。此外，为了进行局部放电电流与是否发出的电磁波的因果关系，还进行了局部放电电流与辐射电磁波的同时测量。关于结果，虽然在得到不一定明确的因果关系时没有很多是，但得到了定性的认识。也就是说，根据目标绝缘体superkuto的形式，局部放电电流形式不同，因此发射的电磁波也不同。它能够变得清晰，电磁波的频谱测量能够显示出可以推测辐射源的可能性。对这一点的定量认识是今后的课题。少

We specified the generation source of the thing for which the method of coping with it for knowing beforehand that insulated apparatus, such as an insulator, will result in destruction from degradation, and will cause the accident in the main purpose of this year of this research, and protecting is offered, and the disturbance wave to various communication systems, and decided that the basic data for maintaining a good communication state are obtained. then, VHF band emitted for reasons, such as the secular degradation, from the insulator for power distribution in the Heisei 12 fiscal year-electromagnetism-it performed two or more extensive zone antennas receiving, and carrying out position locating of the noise by the attainment time lag method Since the electromagnetic wave generally emitted from the insulator of a degradation state is a thing accompanied by partial electric discharge, compared with background noise, sense with the small amplitude is not easy for it. Then, it was dev … More eloped in the field of signal processing in recent years, research applied the active wavelet transformation to signal processing, and we decided that a substantial signal pair noise ratio is raised. Furthermore, since it was considered when two or more degradation insulators exist when using this kind of technique on the spot, and more than one exist as a source of an electric wave, the measuring method and method for the ability to presume two or more method power supply generating positions of a portion was proposed, and it verified by the imitation experiment. furthermore, in order to carry out causal relationship of partial electric discharge current and the electromagnetic wave emitted for whether being dawn, simultaneous measurement of partial electric discharge current and a radiation electromagnetic wave was also performed About the result, although there is no yes very much by the time it obtains not necessarily clear causal relationship, qualitative understanding is obtained. That is, depending on the form of the target insulator SUPEKUTO of that partial electric discharge current form differs and the electromagnetic wave emitted as a result differs. It was able to become clear and spectrum measurement of an electromagnetic wave was able to show a possibility that the source of radiation could be presumed. Quantitive understanding about this point has been a future subject. Less