Grid-connected PWM converter anti-power-grid-disturbance method
A power grid disturbance and converter technology, which is applied in the direction of single-network parallel feeding arrangement, can solve the problems of poor anti-grid disturbance ability, achieve the effect of improving the anti-disturbance level, reducing the failure downtime rate, and improving the ride-through ability
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[0041] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.
[0042] The grid-connected PWM converter anti-grid disturbance method provided by the present invention operates for a short time through the current hardware clamp under the grid disturbance detection, so as to pass through the grid voltage waveform disturbance interval, reduce the failure shutdown rate caused by grid disturbance, and improve Converter immunity level.
[0043] Based on above-mentioned principle, concrete scheme of the present invention is formed by the following steps:
[0044] (1) Detect the grid voltage and output current, and judge in real time whether there is a transient disturbance of the voltage waveform;
[0045] (2) If an overcurrent is detected and a transient disturbance of the voltage waveform is detected at the sam...
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