Rearch On Increase The Transmission Capacity Of Transmission Lines

Electricity consumption in the growing community today, how to increase the transmission capacity of transmission line is currently more concerned about a problem in electric power sector, and improve the conductor temperature of allowed to increase the transmission capacity of transmission lines is one of the main way. Appropriate to increase to allow the norms temperature of the wire existing provisions, you can increase the carrying capacity of the system stability, thereby enhancing the transmission capacity of the normal line. Line has been built to increase the transmission capacity and reduce investment in new lines, with real economic significance.In this paper, introduced based on the concept of a number of transmission capacity calculation, consider some of the major measures to raising transmission capacity, analysis you can get the potential economic benefits to increase the capacity of the transmission wire. Analysis the factors that impact the Carrying capacity of the wire, for example, wind speed, sunshine intensity, environmental temperature, wire temperature and wire extent of old and new.Wire to allow the temperature to improve its feasibility must be considered, namely, major indicators meet demand or not after increase temperature of wore. This article from the point of view of mechanical strength at different temperatures on the strength of lead wire, tensile force, and hardware fittings (junction pipe,wire strain) grip strength were studied, from the analysis we can see that the wire temperature from 70℃to 80℃to meet the requirements for each indicator. Increase the wire to allow the temperature to 80℃, with the support of the gold standard of the electrical performance requirements. Wire jiont between the two points of resistance, the compression type fittings shall not be greater than the resistance of the same length of wire; conductor temperature rise in wire jiont should be not more than the temperature rise that be jionted; to endure the load of electrical fittings should be the carrying capacity was less than the carrying capacity of connecting wires.In this paper, we introduce the paper from relationship between the thermal capacity of wire and carrying capacity of electric transmission line, first of all put forward a concept of dynamic monitoring system of the capacity, and based on this ,we put forward the system programs and ideas of dynamic monitoring system of the electric transmission line capacity. Give the composition and overall structure of the monitoring system. Finally, this paper introduce the Sichuan Electric Power Test Research Institute of the transmission line real-time transmission limit management system, introduced two lines of wire of sichuan power grid in the application of dynamic monitoring system Compatibilizer, and compared between calculation and real-time current of the line,the last we conclused the dynamic capacity to substantially increase the capacity of transmission lines of the conclusions.In this paper, we erect the mathematical model of transmission power with transmission lines operating temperature and sag. Measured mathematical model according to the actual model data analysis on the line, and we have data fitted throught method of least square to study the level of fit, test of the size of the error,check up the quality of test model. For actual data of sag ,temperature and current, the adoption of MATLAB programming, the use of non-linear regression method of fitting to check the mathematical model, and draw the various coefficients of model. Model test results showed that the mathematical mode of transmission power with transmission lines operating temperature and sag is feasible.