Zero-passing commutation method
The invention discloses a zero-passing commutation method. The zero-passing commutation method comprises the steps of calculating a current zero-passing moment T by a controller when an original phase sequence is removed, closing a silicon-controlled switch by the controller at the moment T, calcula...
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| Hauptverfasser: | , , , |
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The invention discloses a zero-passing commutation method. The zero-passing commutation method comprises the steps of calculating a current zero-passing moment T by a controller when an original phase sequence is removed, closing a silicon-controlled switch by the controller at the moment T, calculating a next current zero-passing moment T by the controller after T, disconnecting athird relay by the controller in advance of time T1 before T, calculating a next current zero-passing moment T by the controller after T, disconnecting the silicon-controlled switch by the controller at the moment T, disconnecting an external load, calculating a voltage zero-passing moment T by the controller after the T |
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