THE POSSIBILITY SOLUTIONS ONE CLASS ILL-POSED ELECTROTECHNICAL PROBLEMS WITH ENERGY METHOD

Energy processes are not the main to the electrical circuit analysis, which can be explained by insufficient using of integrated methods. Despite their simplicity and clarity they lead to the loss of information about the energy process. On the other hand, there are many important problems for practical purposes with incorrectly posed conditions for which there is no acceptable solution methods. To analyze these processes can be used energy method proposed by the author. The aim is identifying opportunities for energy identification method to estimate the parameters of electrical circuits in incorrectly set conditions. The method is based on the analysis of time dependences of voltage, current, and their products i.e. instantaneous power. Energy method is developed on this basis. Feature of the method is that the energy mode in particular electromechanical system can be expressed in the form of balance equations of instantaneous power components for the source and the consumer. Typically, in this case analyzes the non-sinusoidal voltages and currents. Enhanced capabilities of the energy method possible when the power circuit is a sinusoidal voltage source. To ensure the application the energy method is implemented power mode follow circuit from the source with the necessary harmonic structure. For this purpose introduces additional synthetically produced spectra of the current and voltage harmonics with a period different from the period of the mains voltage. Efficiency of use the energy method for identification of parameters of the circuit that contains series connection of resistance, inductance and capacitance has been shown. Harmonic components of the instantaneous power on the specified elements for the formation of identity equations have been obtained. The error of parameter identification circuit when administered artificial spectra of voltage and current harmonics with different periods using the energy method does not exceed 5 %. Similar results are obtained for parameter identification of induction motors for T-equivalent circuit. The error parameter identification is less than 4 %. Thus, the work confirms the efficiency of using the energy method for parameter identification of electric circuits with incorrectly posed conditions.