Influence of value resistance contact units of switching devices on losses of the electric power in shop networks of low tension

This paper presents calculation of resistance of tightening contact joints of switching devices. It allows considering the technical condition of low-voltage switching equipment and to specify energy emitted in the switching device in the mode of electrical networks operation is presented in the article.

Download Full-text

Application of NSGA-II Algorithm to Multiobjective Optimization of Switching Devices Placement in Electric Power Distribution Systems

Technological Innovation for Collective Awareness Systems - IFIP Advances in Information and Communication Technology ◽

10.1007/978-3-642-54734-8_42 ◽

2014 ◽

pp. 380-387 ◽

Cited By ~ 2

Author(s):

António Vieira Pombo ◽

Vitor Fernão Pires ◽

João Murta Pina

Keyword(s):

Multiobjective Optimization ◽

Electric Power ◽

Power Distribution ◽

Distribution Systems ◽

Power Distribution Systems ◽

Nsga Ii ◽

Electric Power Distribution ◽

Switching Devices

Download Full-text

POSSIBLE ERRORS OF CALCULATIONS OF LOSSES OF THE ELECTRIC POWER ON SHOP INDUSTRIAL NETWORKS

Proceedings of the higher educational institutions ENERGY SECTOR PROBLEMS ◽

10.30724/1998-9903-2018-20-11-12-81-92 ◽

2019 ◽

Vol 20 (11-12) ◽

pp. 81-92

Author(s):

E. I. Gracheva ◽

A. N. Alimova

Keyword(s):

Ambient Temperature ◽

Electric Power ◽

Power Supply ◽

Electrical Power ◽

Temperature Resistance ◽

Ambient Temperatures ◽

Industrial Networks ◽

Low Tension ◽

Daily Load

In the article it is devoted the analysis and researches of origins and values of possible errors from not accounting of the main defining characteristics when calculating losses of the electric power on shop networks of a low tension. It is proved that in case of determination of losses of the electric power in lines of shop networks it is necessary to consider influence of the following parameters of the equipment: the heating of conductors caused by passing of current of loading through conductors and ambient temperature; resistance of contact joints of switching devices and their number; type of the load graph; ambient temperatures. The diagram of a shop network and daily load graphs of customers of one of the enterprises is researched. Errors of calculations of losses of the electric power are calculated and the analysis of influence of parameters of the equipment on value of losses of the electric power is carried out. The absence of reliable information about elements of shop networks of a low tension and not accounting of the determining leads to an error 5 - 80% in case of computation of losses of the electric power in the systems of industrial electrical power supply.

Download Full-text