Objective: The article provides the description of “Traction — Forecast” Software Package to perform traction-power calculations with manual and automatic forming of driving modes. Applied at present software packages possess a number of drawbacks not allowing automating the process of traction-power calculation performance at researches and testing a new and existing rolling stock. The task of search for power-optimal train driving modes under various operation conditions is also relevant. This problem solution is in the development and testing “Traction — Forecast” Software Package. Methods: Numerical solving train motion differential equation was held by travelled distances with successive approximation usage. Preliminary calculation of motion possible trajectories with the purpose to search for power-efficient train driving modes was pursued. Transient processes in power device and brake system of a train were taken into account. The resistance to train motion from longitudinal outline and profile of a track was being defined given per car distribution of the units of traction rolling stock as well as in the case of per car starting of a train. Calculation for pass-through for trains was made taking into account shunting work peculiarities. Results: As the comparison of the results of traction-power calculations and trial travels has shown, the accuracy of traction calculation accomplishment is of about 1,5 %. Proposed by the program power-efficient modes for driving a train makes it possible to reduce power-resource expenditure on more than 3 %. Practical importance: The use of “Traction — Forecast” programming complex would allow to improve traction calculation accuracy for both, current and newly designed rolling stock. The flexibility of forming traction and braking characteristics as well as available options for to set resistance forces to motion allows estimating made decisions’ efficiency in terms of power-efficiency on the stage of rolling stock design. Application of power-efficient modes of train driving, formed by the software complex, provides for the cut of power-resource expenditures for train traction.
Purpose: Development and approbation of the methodology of definition of energy expenses on excitation of traction generator of diesel locomotive on the stage of locomotive traction characteristic prediction. While definition of diesel power spent on traction generator excitation during prediction of traction-energy characteristics of diesel locomotive it’s necessary to consider current technical state of an exciter and traction synchronous generator. This task can be solved as a result of statistical analysis of information being registered by subsystem of board diagnostics of contemporary diesel locomotives. Methods: It’s used in the work the methods of preprocessor handling of information volume and statistical analysis of formed sampling. Results: There have been obtained the dependences allowing to predict with high precision the expenses of power for traction generator excitation in various work modes of diesel locomotive on the basis of preliminary analysis of data of board diagnostics subsystem. The necessity of such analysis is preconditioned by large scatter of parameters of magnetic system of traction synchronous generators and, hence, power values spent on their excitation which reaches 100% for generators 2TE116U at 40 kW power. Practical significance: The obtained results help to rise definition accuracy of traction-energy properties for particular locomotive.
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