Fast and reliable low voltage through determination method
The invention discloses a fast and reliable low voltage through determination method, and the method adopts the positive-sequence voltage d axle component combination corresponding to the three-phase voltage instantaneous value for judging, the d axle positive-sequence component of the power grid vo...
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The invention discloses a fast and reliable low voltage through determination method, and the method adopts the positive-sequence voltage d axle component combination corresponding to the three-phase voltage instantaneous value for judging, the d axle positive-sequence component of the power grid voltage instantaneous value is expressed in the formula, the d axle negative-sequence component of the power grid voltage instantaneous value is also expressed in the formula, both components are the constant; when the value expressed in the formula is less than the value expressed in the formula, the power grid voltage is reduced, for the low voltage through, the time for executing the method is short, so that the inverter can work quickly, and the speedability of the photovoltaic power generation system is raised. |
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