Unified power quality controller suitable for fault ride-through and control method
A technology for power quality and fault ride-through, applied in photovoltaic power generation, AC network voltage adjustment, harmonic reduction devices, etc., can solve problems that are not suitable for popularization and application, affect the response speed and accuracy of photovoltaic power plants, and cannot adjust voltage smoothly
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[0047] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0048] The topology of the present invention is as Figure 5 As shown, the APF is connected to the low-voltage side of the 110KV transformer, and the DVR is connected to the high-voltage side of the 110KV transformer.
[0049] Such as Figure 5 As shown, the voltage at PCC V pcc , PV outlet voltage V after DVR compensation pv , DVR adopts the same phase compensation of voltage, then there are:
[0050] S out = P out + jQ out = V pv V pcc ( P g + jQ g )
[0051] P ...
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