Maximum Inner Product Method for Extracting the Path-Loss Parameters in Primary Transformer Substations  

作　　者：Qiang Li Hongxin Zhang Tianyi Zheng Xueli Wang Yinghua Lv 

机构地区：[1]School of Electronic Engineering,Beijing University of Posts and Telecommunications,Beijing 100876,China [2]Beijing Key Laboratory of Work Safety Intelligent Monitoring,Beijing 100876,China [3]School of Sciences,Beijing University of Posts and Telecommunications,Beijing 100876,China

出　　处：《China Communications》2019年第4期120-129,共10页中国通信（英文版）

基　　金：the scientific project supported by the National Natural Science Foundation of China (No. 61571063);supported by the Beijing Municipal Natural Science Foundation (No. 3182028)

摘　　要：In order to deploy short-range wireless communication devices in the primary transformer substation, a Maximum Inner Product(MIP) Method is proposed to extract the path-loss parameters in 110 kV and 220 kV primary transformer substations. The maximum inner product of the testing data is calculated to find out the loss index n and the standard deviation σ, and then the pathloss models can be set up. By comparing the MIP with Minimum Mean Square estimation(MMSE) and Cumulative Sum(CUSUM), MIP can match the measured values best. In order to apply the MIP path-loss model, under the initial signal to noise ratio(SNR) at 5 dB and 10 dB, a ZigBee simulation system is constructed to validate the situation that bit error rate(BER) varies with distance. And the ZigBee devices with 5 units are tested in a 220 kV primary transformer substation. The result of the test proves that the path-loss model is accurate.In order to deploy short-range wireless communication devices in the primary transformer substation, a Maximum Inner Product(MIP) Method is proposed to extract the path-loss parameters in 110 kV and 220 kV primary transformer substations. The maximum inner product of the testing data is calculated to find out the loss index n and the standard deviation σ, and then the pathloss models can be set up. By comparing the MIP with Minimum Mean Square estimation(MMSE) and Cumulative Sum(CUSUM), MIP can match the measured values best. In order to apply the MIP path-loss model, under the initial signal to noise ratio(SNR) at 5 dB and 10 dB, a ZigBee simulation system is constructed to validate the situation that bit error rate(BER) varies with distance. And the ZigBee devices with 5 units are tested in a 220 kV primary transformer substation. The result of the test proves that the path-loss model is accurate.

关 键 词：PRIMARY transformer SUBSTATION path-loss ZigBee 

分 类 号：TN[电子电信]