Method for accurately controlling phase selection closing angle

The invention discloses a method for accurately controlling a phase selection closing angle. The method is used for realizing accurate control of a thyristor closing input angle, and comprises the following steps: S1: a processor acquiring alternating current voltage through a high-speed analog-to-d...

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Bibliographische Detailangaben
Hauptverfasser: ZHOU ZHENGQING, ZHANG CHEN, DONG JISHENG, ZHAO FEI, WU WEIDONG, PAN LIJIE, JIAO CAIDONG, SHEN HAITAO, HUANG FANG, XU BENLIANG, ZHU QI, CAO YEFENG, WANG GUOZHONG, YAO BO
Format: Patent
Sprache:chi ; eng
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Beschreibung
Zusammenfassung:The invention discloses a method for accurately controlling a phase selection closing angle. The method is used for realizing accurate control of a thyristor closing input angle, and comprises the following steps: S1: a processor acquiring alternating current voltage through a high-speed analog-to-digital conversion channel and acquiring a voltage zero crossing point position in combination with asmoothing algorithm; S2, the processor obtaining a voltage change period and configuring a timer; and S3, the processor starting a configured timer and performing closing through a thyristor. According to the method for accurately controlling the phase selection closing angle, a voltage zero point signal is acquired by using software, and interference and influence caused by jittering at a voltage zero point are effectively filtered by using a smoothing algorithm. Meanwhile, the thyristor is used as an actuating mechanism for closing, so that the response time is stable and extremely short, and the error of an actual