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: D- -
: 118
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: 2025
: .. D- - // . - 2025. - . 118. - .300-324.
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(.): microgrid, voltage inverter, phase-locked loop, total harmonic distortion, power quality
: D- . RC- THD. MATLAB/SIMULINK D-. -, . D- c , , , D- (), . D- - . , . , .
(.): The paper investigates the synchronization of voltage inverters based on a self-oscillating D-class amplifier under nonlinear rectifier load conditions. The influence of a rectifier load with an RC chain on power quality is studied by measuring the total harmonic distortion (THD) coefficient. The paper simulates a self-oscillating D-class amplifier in the MATLAB/SIMULINK environment. Methods for synchronizing two such voltage inverters in master-slave mode are considered, and a method for synchronization by copying the reference signal is proposed. For the first time, a method of phase-locked frequency synchronization of a D-class self-oscillating amplifier with the same amplifier is applied, and simulation is performed in the environment, as a result of which the invariance of the operation of an inverter consisting of a self-oscillating D-class amplifier and a phase-locked frequency (PLL) module with respect to the connected load. A comparative analysis of the operation of a self-oscillating D-class amplifier and a classic half-bridge microgrid voltage inverter under a nonlinear load was performed. An analysis of the voltage spectrum obtained when operating under a rectifier load was performed. The paper proposes a method for generating a reference signal using the PLL method for parallel operation with a general-purpose network, and mathematical modeling of operation with a resistive and rectifier load in a microgrid was performed.
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