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This paper proposes an improved particle swarm optimization (PSO) algorithm to solve the sensor configuring optimization problem for the harmonic monitoring in the power grid. The model of the tested and un-tested node voltage and current is firstly set up. Then the PSO algorithm, which uses the logistic chaos method to obtain the initialized value for a better ergodic property and normalizes the...
This paper focus on harmonics and inter-harmonics with nonsynchronous sampling in IEC 61000-4-7 standard framework measurement problem, proposed the group measurement method and accurate measurement method of harmonics and inter-harmonics, and through removing the leakage value of other components on the concerned lines to eliminate interference of other components, solved the problem of adjacent...
This paper presents the principle and implementation of the wavelet PWM (WPWM) technique based on dyadic-type multi-resolution analyses (MRAs) for single-phase inverters, analyzes and gives the inverter's output features at different parameters based on WPWM technique, which is beneficial to choose suitable parameters. Finally, according to the harmonic eliminating principle, compares WPWM with SPWM...
This paper presents the principle and implementation of the wavelet PWM (WPWM) technique based on non-dyadic type multi-resolution analyses (MRAs) for three-phase inverters, analyses and gives the impacts of the initial values of scales by WPWM on the three-phase full-bridge and half- bridge inverter's output features, which is beneficial to choose suitable initial values of scales. Finally, the performances...
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