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发明授权
CN105158587B 直流线路电晕可听噪声测试数据中无效数据的判定方法 有权

直流线路电晕可听噪声测试数据中无效数据的判定方法
摘要：
本发明提供了一种直流线路电晕可听噪声测试数据中无效数据的判定方法，包括步骤1：测量在预置工况下高压直流线路的电晕可听噪声，获取高压直流线路的所有测量点的噪声频谱；步骤2：计算噪声频谱的高频段谱包络面积SEAih、中频段谱包络面积SEAim、中频段谱不规律性指标SIim和全频段谱包络面积SEAia；步骤3：依据高频段谱包络面积SEAih、中频段谱包络面积SEAim、中频段谱不规律性指标SIim和全频段谱包络面积SEAia判断噪声频谱是否有效，若噪声频谱为无效数据则停止判断。与现有技术相比，本发明提供的一种直流线路电晕可听噪声测试数据中无效数据的自动判定方法，不需要进行人工剔除，节省了人力、时间等，同时也避免了因人的主观因素而使对噪声测量数据的剔除标准不一致的问题。
摘要（英）：

The invention provides a method for judging invalid data in DC line corona audible noise test data. The method comprises the following steps: 1) measuring corona audible noise of a high-voltage DC line under a preset condition, and obtaining noise spectrum of all measurement points on the high-voltage DC line; 2) calculating high-frequency-band spectrum envelope area SEAih, middle-frequency-band spectrum envelope area SEAim, middle-frequency-band spectrum irregularity index SIim and full-band spectrum envelope area SEAia of the noise spectrum; and 3) judging whether the noise spectrum is valid according to the high-frequency-band spectrum envelope area SEAih, middle-frequency-band spectrum envelope area SEAim, middle-frequency-band spectrum irregularity index SIim and full-band spectrum envelope area SEAia, and if the noise spectrum is invalid data, stop judging. Compared with the prior art, the method for judging invalid data in the DC line corona audible noise test data does not need artificial rejecting, thereby saving manpower and time and the like; and meanwhile, the problem of inconsistent noise measurement data rejecting standard due to subjective factors of different persons is prevented.

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