METHOD OF ALLOWANCE FOR SAG OF ARROW OF THREE-PHASE THREE-WIRE POWER LINE AT ITS MATCHING WITH ELECTRIC LOAD

摘要

FIELD: electricity.;SUBSTANCE: invention is used in electrical engineering. Matching of the three-phase three-wire power line with electric load is achieved as a result of compliance with certain conditions which can seasonally change as a result of change of primary parameters of three-phase three-wire power line determined in view of the size of sag of each wire of this power line. Seasonal change of sag of each wire is measured using distance meters. The matching consists in comparison of the valid and reference load resistance, voltages at the ends of the line or currents coming to a load. Initial data on voltage and current in the line are obtained through interfaces or sensors made in a form of voltage or current transformers, spectrum analysers, voltage dividers or alternating-current shunts. As a result of initial data processing by the processor control signals are generated for correcting elements, which can be represented by direct voltage regulators of power transformers, automated process systems, electric energy accumulators, active power sources such as low-power hydroelectric power plants or electric power plants of other types.;EFFECT: decrease of electric energy losses.;2 cl, 7 dwg