INFLUENCE OF FILTERS OF HIGHLY HAGMONY ON VOLTAGE LEVEL AND ENERGY PARAMETERS OF NODE THE ELECTRICAL SUPPLY

The energy indicators of the substation 150/10 kV, equipped with the filter-compensating devices (FCD), installed on each tire section in the filters 3-5-7-11 harmonics are studied. For each of the load options, the optimal combination of switching filters is selected, the voltage is calculated for 10 kV tires and the power consumption in the equipment. The normal power circuit assumes the independent operation of the main transformers, but in some cases, three workshop substations are powered by a single transformer, which leads to its overload. For the purpose of studying the degree of unloading of the main transformer, one-minute values of the primary current of the transformer T-3 were recorded, as well as two-month control measurements of the daily electricity consumption in the case switching on of power filters with capacitor banks (СB) of increased power. It is advisable to select such CВ for the filter F-11, which will effectively limit the harmonics of order . In case of unloading of the main transformer at full power by 20-25% simultaneously the problem of increasing the power factor from 0,65-0,7 to 0,95-0,98 at the switching of power filters is solved. Proposals for improvement of the voltage mode of the power supply unit are proposed, namely: to dismantle the F-3 filters to their low efficiency and to install semiconductor power stabilizers on each section of the tires. The thyristor compensator stabilizes the consumed reactive power and voltage on the bus 10 kV substation deep input, and 5-7-11 harmonics filters will work in normal mode.