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This paper adopts PAM+PWM hybrid modulation method in a five cascade SVG (Static Var Generator). Four PAM (Pulse Amplitude Modulation) units output a voltage which is of fixed amplitude and in phase with the system voltage; and current direct controlling method was applied in the only PWM (Pulse Width Modulation) unit to adjust the output reactive current. To balance the DC-side voltage, pulses rotated...
The conventional passive filtering has been outdated since it detune with age and the performance of passive filters is affected by the grid impedance, which may cause resonance problems. Active power filters (APFs) are attractive solutions to solve harmonics-related power quality problems due to the development of power semiconductors, control theory and digital signal processors (DSP), and they...
This paper proposes an LCL-filter-based hybrid active power filter for harmonic mitigation of a 10/0.4 kV residential distribution system. Adaptive linear neuron network (ADALINE) is applied for individual harmonic component extraction from distorted nonlinear load currents, and the estimated signals are used for the selective harmonic elimination (SHE) purpose in the current-loop controller. A robust...
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