Control algorithm for single-phase unified power quality regulator
A technology of power quality and control algorithm, which is applied in the direction of electrical components, circuit devices, AC network circuits, etc., can solve problems such as poor compensation and insufficient UPQC research, and achieve simple and easy detection and control parameter setting Simple, real-time effect
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[0031] The present invention provides a single-phase unified power quality regulator control algorithm, such as figure 1 , 2 , 3, its specific implementation process includes the following steps:
[0032] Step 1: Use the digital phase-locked loop to obtain the phase-locked angular frequency ω, and the phase-locked angle θ=ωt;
[0033] Step 2: Desired voltage from the load side Multiply with sinθ (the angle θ obtained in step 1) to get u 1 , u 1 and single-phase grid voltage u S Subtract to obtain the command value of the harmonic voltage
[0034] Step 3: The voltage u across the filter capacitor on the UPQC series side filter capacitor at time k obtained through data acquisition c (k), and command value After the subtraction, it enters the digital PI controller and compares it with the triangular carrier to generate the modulation signal of the single-phase full-bridge inverter unit on the series side;
[0035] Step 4: Generate the driving pulse of the single-phase...
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