# FUNDAMENTAL PRINCIPLES FOR THE METHODOLOGY OF PRELIMINARY SELECTION OF VARIANTS FOR DETERMINING WITH THE USE OF ELECTRONIC COMPUTERS, THE OPTIMAL PARAMETERS OF POWER SUPPLY DEVICES

## OSNOVNYE POLOZHENIIA METODIKI PREDVARITEL'-NOGO OTBORA VARIANTOV DLIA VYBORA NA E.TS.V.M. OPTIMAL'NYKH PARAMETROV USTROISTV ELEKTROSNABZHENIIA

With the use of computers for planning energy supply arrangements the necessity arises to examine a large quantity of variants of the distribution of traction substations, the equipment installed in them, and a cross section of the leads of the catenary network. In order to accelerate and simplify the calculations it is expedient to choose fundamental parameters according to a statistical methodology based on the analysis of operational data, and then variants which ensure a minimum of expenditures by a mathematical modelling method; these are verified as to reliabiity and insurance of a given capacity in normal and forced regimens of operation. The basic principles of the statistical methodology consist of the following: (1) according to output data (cargo flows, types of electric locomotives, train weight) to define the line midyear load (in square tons - hour per km.) of all trains; (2) according to nomograms define the optimal distances in the area of economical cross sections, and taking into account the tying of the substations to the distant points, and the types of suspensions, set the variants; and (3) to calculate the mid- 24-hour expenditure of energy for each substation. This is used as output to define the calculated loads and choose parameters for the electrical energy system. In this way, by using statistical methodology, it is possible to carry out a preparatory selection of those variants which yield a minimum of expenditures, and then to complete on the electronic computer verification calculations with the concentration of trains, as well as to consider the throughput according to energy supply arrangements when switching off one or several in series of the traction substations.

• Supplemental Notes:
• Abstract only is available in English, original untranslated as of November 1976.
• Corporate Authors:

All-Union Labor Red Banner Railway Research Inst

USSR Ministry of Railways
Moscow B-174,   USSR
• Authors:
• Miroshnichenko, R I
• Publication Date: 0

• Russian

## Media Info

• Features: Figures; References; Tables;
• Pagination: p. 51-60

## Filing Info

• Accession Number: 00130292
• Record Type: Publication