Double-random SVPWM modulation SVG dual-sequence synchronization control method
A synchronous control, double random technology, applied in reactive power adjustment/elimination/compensation, AC network circuits, electrical components, etc., can solve the problem of unfavorable power quality of power grid, affect power quality, reduce SVG output voltage and current high-order harmonics wave peak value and other problems, to achieve the effect of easy popularization, strong practicability, and improvement of the three-phase unbalance of the power grid
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[0049] Such as figure 1 Shown, the SVG dual sequence synchronous control method of double random SVPWM modulation of the present invention, comprises the following steps:
[0050] Step 1. Detection of load current, SVG output current, DC side capacitor voltage and grid voltage;
[0051] Step 2: Use the positive and negative dual-sequence control strategy to compensate the positive sequence component and the negative sequence component respectively. The specific process is as follows:
[0052] For the positive sequence component, firstly, Clark transform and positive sequence Park transform are performed on the detected load current, and then converted to the positive sequence synchronously rotating dq coordinate system, and the second harmonic is filtered out by a low-pass filter to obtain the positive sequence reactive component command signal i qp * ; Next, carry out Clark transformation and positive sequence Park transformation on the SVG output current to obtain the pos...
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