scholarly journals Identification Method for Conductor Measurement Temperature in Dynamic Capacity-Increase of Transmission Line

2016 ◽  
Author(s):  
Peng Wang ◽  
Shuhai Feng ◽  
Yong Wang ◽  
Jun Liu ◽  
Jinquan Zhao
Keyword(s):  
Transmission Line ◽  
Measurement Temperature ◽  
Dynamic Capacity ◽  
Identification Method ◽  
Capacity Increase

scholarly journals External Breaking Vibration Identification Method of Transmission Line Tower Based on Solar-Powered RFID Sensor and CNN

Electronics ◽  
2020 ◽  
Vol 9 (3) ◽  
pp. 519
Author(s):  
Fangming Deng ◽  
Kaiyun Wen ◽  
Zhongxin Xie ◽  
Huafeng Liu ◽  
Jin Tong
Keyword(s):  
Transmission Line ◽  
Radio Frequency Identification ◽  
Descent Method ◽  
Identification Accuracy ◽  
Batch Size ◽  
Optimum Number ◽  
Gradient Descent Method ◽  
Super Capacitor ◽  
Identification Method ◽  
Solar Powered

This paper proposes an external breaking vibration identification method of transmission line tower based on a radio frequency identification (RFID) sensor and deep learning. The RFID sensor is designed to obtain the vibration signal of the transmission line tower. In order to achieve long-time monitoring and longer working distance, the proposed RFID sensor tag employs a photovoltaic cell combined with a super capacitor as the power management module. convolution neural network (CNN) is adopted to extract the characteristics of vibration signals and relevance vector machine (RVM) is then employed to achieve vibration pattern identification. Furthermore, the Softmax classifier and gradient descent method are used to adjust the weights and thresholds of CNN, so as to obtain a high-precision identification structure. The experiment results show that the minimum sensitivity of the proposed solar-powered RFID sensor tag is −29 dBm and the discharge duration of the super capacitor is 63.35 h when the query frequencies are 5/min. The optimum batch size of CNN is 5, and the optimum number of convolution cores in the first layer and the second layer are 2 and 4, respectively. The maximum number of iterations is 10 times. The vibration identification accuracy of the proposed method is over 99% under three different conditions.

The Research and Application of Power Grid Transmission Interface Dynamic Capacity-Increase Technology

2013 ◽  
Vol 462-463 ◽  
pp. 141-149
Author(s):  
Xiang Fu Guo ◽  
Xin Bo Huang ◽  
Di Ming Wan ◽  
Zhi Min Guo ◽  
Lei Liu
Keyword(s):  
Transmission Lines ◽  
Power Grid ◽  
Current Line ◽  
Mathematical Relationship ◽  
Dynamic Capacity ◽  
Capacity Increase ◽  
Interface Dynamic ◽  
New Type ◽  
Allowable Temperature ◽  
Important Significance

The real-time capacity-increase technology of transmission lines is adopted to increase transmission current capacity of transmission lines, by which the conductor temperature, the ambient temperature and the wind speed can be timely measured and the transmission current capacity can be adjusted dynamically without breach of available rules. A new type of Morgan's transmission line dynamic capacity-increase model is established, which can fast and effective computing the current line transmission capacity, and the transient running formula of transmission lines is established, the mathematical relationship between the conductor allowable temperature and the variety of sag of the span is presented, and the application of the monitoring device is introduced, it has important significance to research the power grid transmission interface dynamic capacity-increase technology.

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