DOA Estimation of Electromagnetic Wave due to Discharge Phenomena using the Signal Subspace Method
DOA Estimation of Electromagnetic Wave due to Discharge Phenomena using the Signal Subspace Method
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DOI：
10.1541/ieejpes.130.802
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发表时间：
2010
影响因子：
--
通讯作者：
A. Tatematsu;K. Tanabe
中科院分区：
文献类型：
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作者：
A. Tatematsu;K. Tanabe
由于放电现象，可能从电力设备发射引起干扰的脉冲电磁波，这可能发生在故障点，例如金属支撑件之间的非预期窄间隙或劣化的绝缘体。因此，有必要对电磁波源进行有效定位或波达方向（DOA）估计，以减少维护，消除其对通信系统的影响。本文将信号子空间方法应用于电磁波的波达方向估计。提出了一种信号子空间方法来估计连续信号波的到达角。该方法基于特征值分解技术，可以处理多波信号，当电磁波从测试传输线上的球形间隙中发射时，可以在2 °误差内估计出这些信号的到达角，验证了信号子空间方法对放电现象引起的电磁波的到达角估计的适用性。
Pulsed electromagnetic waves causing interference may be emitted from power equipment owing to a discharge phenomenon, which may occur at a faulty point, such as an unintended narrow gap between metal supports or a deteriorated insulator. Therefore, it is necessary to localize the electromagnetic source or estimate its direction of arrival (DOA) effectively to reduce maintenance and eliminate its effect on communication systems.There is also a possibility that multiple sources of electromagnetic wave and multiple waves exist in power equipment. In this study, we apply the signal subspace method to the DOA estimation of the electromagnetic wave. The signal subspace method is developed to estimate the DOAs of continuous signal waves. This method can handle multiple waves and is based on the eigenvalue decomposition technique.When electromagnetic waves are emitted from spherical gaps attached to a test transmission line, We can estimate those DOAs within the errors of 2 degrees, and confirm the applicability of the signal subspace method to the DOA estimation of the electromagnetic wave due to the discharge phenomenon.