Research On Catenary Melting Ice Based On The High Frequency Current

ABSTRAC:In winter, The contact line iceing is one of the most serious natural disasters for traction power supply system, the affected area is large, it is difficult to repair. In the process of driving electric locomotive running, Catenary ice will lead to the arc phenomenon When the contact line and pantograph contact, at the same time.affect pantograph flow normal current from Catenary which lead to locomotive run unnormally.When the Contact wire ice very serious can make the pillar bear weight beyond the ability of the design requirements, so the pillar will dumping, caused economic losses to the traction power supply system. At present, The research in the ice of the traction supply power system are mainly frequency alternating current (ac) to melt ice, research on dc and high frequency current to melt ice for the traction power supply system is less.In this thesis, through establish model of contact wire ice and contact wire melting ice, analysis of the calculation model of melting ice by thermodynamic Derive the formulate of melting ice time, MATLAB software are used to draw the three dimensional relationship of melting time and melting current value and the frequency of current under the condition of a given environment, According to the diagram, put forward the ideal frequency of melting ice current, designed a cascade type of conversion device which is high power and high frequency of voltage. Determined Melting ice scheme for the traction power supply system. When the high frequency ac current which produce by device flows through the line of contact, the resistance of contact line will produce enough of joule heat in a short period of time, make the contact line take off the ice quickly. Using MATLAB with Simulink package simulate the high voltage and high power frequency conversion device output voltage and current waveform when the contact line melting ice Verified using the high frequency alternating current to solve the problem of melting ice quickly by ANSYS simulation temperature filed, which cost time less and improve the economic benefits of railway, provide a reference to resolve the problem quickly which the transmission lines cover ice...