Analysis of a Smart Sensor Based Solution for Smart Grids Real-Time Dynamic Thermal Line Rating

Dynamic thermal line rating (DTLR) allows us to take advantage of the maximum transmission capacity of power lines, which is an imperious need for future smart grids. This paper proposes a real-time method to determine the DTLR rating of aluminum conductor steel-reinforced (ACSR) conductors. The proposed approach requires a thermal model of the line to determine the real-time values of the solar radiation and the ambient temperature, which can be obtained from weather stations placed near the analyzed conductors as well as the temperature and the current of the conductor, which can be measured directly with a Smartconductor and can be transmitted wirelessly to a nearby gateway. Real-time weather and overhead line data monitoring and the calculation of DTLR ratings based on models of the power line is a practical smart grid application. Since it is known that the wind speed exhibits important fluctuations, even in nearby areas, and since it plays a key role in determining the DTLR, it is essential to accurately estimate this parameter at the conductor’s location. This paper presents a method to estimate the wind speed and the DTLR rating of the analyzed conductor. Experimental tests have been conducted to validate the accuracy of the proposed approach using ACSR conductors.

Thermoelastic Processes by a Continuous Heat Source Line in an Infinite Solid via Moore–Gibson–Thompson Thermoelasticity

Many attempts have been made to investigate the classical heat transfer of Fourier, and a number of improvements have been implemented. In this work, we consider a novel thermoelasticity model based on the Moore–Gibson–Thompson equation in cases where some of these models fail to be positive. This thermomechanical model has been constructed in combination with a hyperbolic partial differential equation for the variation of the displacement field and a parabolic differential equation for the temperature increment. The presented model is applied to investigate the wave propagation in an isotropic and infinite body subjected to a continuous thermal line source. To solve this problem, together with Laplace and Hankel transform methods, the potential function approach has been used. Laplace and Hankel inverse transformations are used to find solutions to different physical fields in the space–time domain. The problem is validated by calculating the numerical calculations of the physical fields for a given material. The numerical and theoretical results of other thermoelastic models have been compared with those described previously.

The Meridian-like High Thermal Line as the Evidence on Existence of Meridians in Human Body

Background; The acupuncture meridian is the channel through which Qi & Blood flow, and acupuncture is having many thousands year history for treating various illnesses. However, there was no powerful evidence to prove the existence of meridians until now. Objectives; The purpose of this study is to explain that the meridian-like high thermal line (MLHTL) is the powerful evidence to prove the existence of meridians in human body. Methods; The meridian-like high thermal line inducing and the disease cure effect in the target organs connected along the meridians by the mineral pulse light stimuli, was researched and analyzed. Results; The meridian-like high thermal lines were induced along the classic meridians course at the human body surface, and simultaneously the internal refractory diseases such as nephrotic syndrome and angina pectoris were treated in the target organs connected along the meridians without drug use by the mineral pulse light stimuli. Conclusions; The meridian-like high thermal line is the powerful evidence to prove the existence of meridians in human body. From now on, MPL stimulator (Version 1) can induce MLHTL, and can show the non-drug cure effect in target organ connected along MLHTL.