Search results

Introduced on the Russian Railways network monitoring system download the snow train has allowed to identify cases of export volume of the snow mass is much less possible when cleaning railway tracks from snow, which leads to the underutilization of capacity of the snow trains and shunting locomotives and irrational use of fuel and energy resources for operation of rolling stock. The purpose of the work is to consider the fuel and energy efficiency of snow-removal trains and shunting locomotives carrying out their movement and to determine ways to reduce the consumption of fuel and energy resources for the performance of works on cleaning the tracks from snow (in economic traffic). To achieve this goal, one of the structural divisions of JSC "Russian Railways" estimated the volume of snow removal by snow-removal trains, calculated the values of mechanical work performed by locomotives to move snow-removal equipment and fuel consumption by snow-removal trains and locomotives to perform work on clearing snow from the tracks. On the basis of the comparative analysis the conclusion is made on the available reserves of increase of fuel and energy performance of the rolling stock while clearing paths of snow and the technique allowing to estimate the total fuel consumption for snow removal snow plow trains and traction units (locomotives), and ways to improve the power efficiency of snow-removing trains and working with them traction means, such as the use of rolling stock with a rational value of mass and power depending on weather conditions.

An analysis of the operation of electric locomotives on certain sections of railways shows that their power is used irrationally and electric locomotives are operated with low energy indicators, especially on long-distance flat stretches, which indicates that there are reserves for reducing the consumption of electric energy. The purpose of the work is to determine the optimal value of the rated power of electric locomotives by minimizing the electricity consumption on the site and to estimate the loss of electric energy from the non-optimal use of electric locomotives' power. To achieve this goal, an equation was drawn up for the dependence of the electric power consumption on the traction of an electric locomotive on the value of its rated power. To find the optimal value, this equation was differentiated by the value of the rated power of the electric locomotive and solved using the Cardano method. The expression allowed us to determine the minimum consumption of electric power is the rated power of the electric locomotive, depending on the required for a given traffic conditions and to evaluate the variation of energy consumption from non-optimal use of its structural capacity. The obtained equations allowed us to solve the problems of choosing the optimal value of the rated power of electric locomotives and evaluating the irrational consumption of electric energy from the non-optimal use of their power and can be used to determine the optimal parameters of electric locomotives. The conclusion is made about the importance of choosing the optimal power values of electric locomotives in order to obtain the highest technical and economic indicators during their operation.

Currently operating on the network of Russian Railways passenger electric locomotives, while driving trains on different difficulty stages, not equally utilize the available capacity and work with different energy performance. The purpose of the work is to consider the energy efficiency of passenger electric locomotives when driving trains on certain sections of Railways and to determine ways to improve their energy performance. To achieve this goal, the work of passenger locomotives EP1 and EP2K on the sections of the mid-Siberian railway was analyzed, the average mass of passenger trains and their speed were determined, the values of the power realized by electric locomotives in operation were calculated, as well as the rational values of the power and mass of locomotives needed for driving passenger trains on the considered sections of the track, and a comparative assessment of the possible operation of electric locomotives with rational values of power and mass with the operated locomotives EP1 and EP2K. On the basis of the comparative analysis, the conclusion is made about the available reserves for increasing the energy indicators of passenger electric locomotives in certain sections of the Russian Railways, such as the operation of locomotives with rational values of power and mass required to provide modern passenger transportation, and the method of determining the energy efficiency of electric locomotives, which allows without calculating the traction and energy characteristics to estimate the cost of electricity for traction of trains.

Electricity consumption for traction depends on a number of operational parameters, including the use of power of electric rolling stock. Due to the fact that the Russian Railways are characterized by pronounced uneven sections of track, which, along with the hilly-mountain and mountain profile and has flat stretches long-haul locomotives when operating on different difficulty sections of the road have a different load and therefore operated with a different energy indicators. The purpose of this study was to evaluate the energy performance of the electric locomotives for driving passenger trains on flat terrain and the possible ways to increase their energy efficiency. To achieve this goal was the analysis of passenger electric locomotives EP2K on a flat site Novosibirsk-Omsk, West-Siberian railway, the mean values of the speeds and masses of passenger trains have been calculated for capacity, utilization factor, power rating and efficiency of electric locomotives. On the basis of the conducted research it was determined that the EP2K electric locomotives in the plains of the Railways a large extent operate in inefficient modes, due to their excess capacity, which is impossible to implement. In this regard, it was concluded that reserves of energy saving in those areas of Railways, where the operating conditions there is a clear underutilization of the capacity of the locomotives, a method of increasing the efficiency of their use through the use of a stepped power control and comparative evaluation of EP2K electric locomotives on all parts and traction motors.

Rational way to improve the operational efficiency of the locomotive is adjustable power.The implementation of this method possible with the use of automatic power regulation implementing the optimal load,the operation mode of the traction and energy unit (TEU) of the locomotive. The aim of this work is to obtain mathematical relationships,establishing the optimal ratio between the number of employees of TD given thrust and speed. Determination of the optimal ratio being in the traction motors is based on finding the minimum power losses at the nodes of the TEU. Search the minimum of complex functions is an optimization problem,which from a mathematical point of view is to determine the minimum of function of several variables with a number of constraints,and relationships. To solve the problem of finding the minimum of a complex function,we used the method of indeterminate Lagrange multipliers. The optimization process is considered at a constant value of the voltage supplied to the TD and sold power.Variables - the force of traction,speed of movement,the ratio of incremental losses,the resistance of the circuit of the armature of TD was assumed constant,which allowed to simplify the solution of the problem,reducing it to find three unknown quantities - current,the number of TD and magnetic flux. The solution to this system of equations for the number TD,participating in the work were obtained analytical dependences the optimum values of the TD depending on the speed,the thrust force on the rim of the driving wheels of the locomotive and tension. Analytical expressions for determining optimal parameters of power regulation of electric DC,allow to obtain the optimal values of the number of workers so and the load depending on the given values of thrust and speed in the entire range of load modes of EPS. The analytical expressions can be used when drawing up regime maps and energy performance certificates EPS,and also in the most important automatic devices of power control of the rolling stock to set the optimal ratio of number of employees and so on.

Electricity consumption for traction depends on a number of operational parameters, including the use of power of electric rolling stock. On Russian Railways there are flat areas of great extent, which operated the locomotives inefficient use of power and work modes with low energy performance. The aim of this work is to examine ways to improve the energy efficiency of passenger locomotives, such as the operation of electric rolling stock with rational values of power and number of axes for the modern passenger transport on the flat sections of the road long-haul and assess their energy performance. To achieve this goal was determined by the rational value of the power required for driving trains on this stretch of track with maximum speeds of 160 km/h, the calculations of the asynchronous traction motors obtained traction and power characteristics of electric locomotives with asynchronous traction drive, and a proposed comparison methodology, allowing to evaluate the difference of power consumption for traction of electric locomotives with asynchronous traction drive (with rational values of power and number of axes) currently operating a DC electric locomotive EP2K. On the basis of the conducted research it was concluded that there are reserves for improvement of energy efficiency of passenger locomotives on the flat sections of the road long-haul, such as operation of electric rolling stock with rational values of power and number of axes corresponding to the train weight, speed and track profile, which will significantly reduce the cost of electricity for traction of trains.