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Your search keyword '"Teng, Jen-Hao"' showing total 83 results
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83 results on '"Teng, Jen-Hao"'

55. Communication Performance Assessment for Advanced Metering Infrastructure.

Author

Teng, Jen-Hao, Chao, Chia-Wei, Liu, Bin-Han, Huang, Wei-Hao, and Chiu, Jih-Ching

Subjects
*SMART meters, *COMMUNICATION infrastructure, *FUZZY logic, *TIME management, *SUCCESS
Abstract

Advanced Metering Infrastructure (AMI), the foundation of smart grids, can be used to provide numerous intelligent power applications and services based on the data acquired from AMI. Effective and efficient communication performance between widely-spread smart meters and Data Concentrator Units (DCUs) is one of the most important issues for the successful deployment and operation of AMI and needs to be further investigated. This paper proposes an effective Communication Performance Index (CPI) to assess and supervise the communication performance of each smart meter. Some communication quality measurements that can be easily acquired from a smart meter such as reading success rate and response time are used to design the proposed CPI. Fuzzy logic is adopted to combine these measurements to calculate the proposed CPI. The CPIs for communication paths, DCUs and whole AMI can then be derived from meter CPIs. Simulation and experimental results for small-scale AMIs demonstrate the validity of the proposed CPI. Through the calculated CPIs, the communication performance and stability for AMI can be effectively assessed and supervised. [ABSTRACT FROM AUTHOR]

Published
2019
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79. 3-D IR imaging system for heat spot tracer.

Author

Pan, Jun-Ming, Chen, Chia-Yen, Teng, Jen-Hao, and Chen, Chi-Fa

Abstract

Two-dimensional (2-D) infrared thermography (IRT) has been widely used in various domains. The methodology can be further extended to 3-D applications if the spatial information of the temperature distribution is available. In this paper a 3-D infrared imaging system based on Silhouette Volume Intersection has been proposed to reconstruct the volumetric temperature data. The method first calibrates the intrinsic and extrinsic parameters of the IR sensor; the poses of the sensor are then used to estimate the rotation axis of the turntable. By means of the estimated parameters, the system is able to calculate the rigid transformation of the sensor with respect to a measured object which is placed on a turntable and viewed from different directions. Once the sensory parameters and viewing directions are acquired, we apply the Silhouette Volume Intersection algorithm to the 2-D IR images to produce a volumetric thermal accumulation. In the experimental results we demonstrate that the method can effectively identify the source of heat in 3-D space. [ABSTRACT FROM PUBLISHER]

Published
2013
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83. Backward/Forward Sweep-Based Harmonic Analysis Method for Distribution Systems

Author

Teng, Jen-Hao and Chang, Chuo-Yean

Abstract

A fast harmonic analysis method designed for three- phase radial distribution systems is proposed in this paper. The proposed method is developed based on the exact three-phase component models, frequency-scan formulation, and a commonly used forward/backward sweep technique. The backward sweep is used to build the relationship between branch currents and bus current injections of a distribution system, and then the forward sweep can use the aforementioned relationship to calculate bus voltages. The forward/backward sweep technique is a powerful method and has been widely used in distribution system analysis; however, it cannot be used for harmonic analysis directly. Therefore, the proposed method designs some specific data formats, integrates them into the commonly used forward/backward sweep technique, and derives useful formulas to calculate the effects of system status induced by harmonic pollution. The proposed method is more efficient than the conventional harmonic analysis algorithms since the time-consuming procedure of the admittance matrix inverse is not necessary in the solution procedure. Test results demonstrate the accuracy and efficiency of the proposed method.

Published
1995
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