Specificities of the functioning of the loaded resonant circuits in transmission systems of electrical energy

The article presents analytical study of the behavior of the resonant sequential and parallel circuits when they are loading. The significant specificities in the change of the frequency of the own resonance are revealed. Besides when the circuit is loaded, there is a significant decrease in the resonance quality factor, and as a result, a decrease in the output voltage at the output of the system. Developers of equipment using resonant circuits in electric power transmission systems are struggling with the"deviation" of the resonance frequency and with a decrease in voltage at the output of the system by correcting the frequency of the supply current and voltage stabilization using feedback circuits. The aim of the study is to find an alternative power supply strategy for the loaded resonant circuit that does not need to be corrected for the frequency of the supply current. This will enable the generator of the supply current to operate at a constant frequency. Two schemes of connecting reactive components in a loaded resonance circuit are investigated. The general specificities of the operation of contours under loading are revealed. A common specificity of the functioning of circuits is the impossibility of loading a resonant circuit in excess of the natural mode. The variant of transition from a mode of a sequential circuit to a mode of a parallel circuit and on the contrary is offered. Operation with switching modes allows the circuit to work with a load varying from short circuit to idle move. A variant of the generator operation at a frequency, ensuring the invariance of the input current of the resonant system when the load resistance varies from short circuit to idle move, is also proposed.