Summation of electrical loads of residential and public buildings of a residential complex

Relevance. The aim of the research is to improve the regulatory framework governing the procedure for determining the estimated load when summing up residential and public buildings of residential complexes.

The purposes. To analyze the graphs of electrical loads of transformer substations supplying a mixed load: apartment buildings, preschool educational institutions and secondary schools at different times of the year, days of the week, times of day, with subsequent development of proposals for updating SP 256.1325800.2016 "Electrical installations of residential and public buildings. Design and installation rules" in terms of the methodology for determining the total load of residential and public buildings of a residential complex.

Methods. In achieving the set goal, experimental, mathematical and statistical methods were used.

Results. The performed analysis of the load graphs allowed us to determine the time periods of maximum loads of transformer substations feeding a mixed load. The results of the analysis will be used to update the coefficients of simultaneity and noncoincidence of maximums for summing up the mixed load at the transformer substation.

Conclusion. The maximum load of transformer substations feeding only apartment buildings falls on the evening hours of weekends in the winter period (the load is lower on weekdays). On the contrary, the maximum loads of transformer substations feeding apartment buildings and preschool educational institutions, as well as apartment buildings and secondary schools, fall on weekdays. The estimated load of such transformer substations should be summed up with the load of apartment buildings on weekdays, taking into account the daily maximum load of educational institutions, for which it is necessary to provide a correction factor.

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