摘要:合闸控制是船舶电站自动准同期并网的难点与关键所在。PLC系统实时采集差频三角波电压,以PLC的平均扫描周期作为差频电压采样周期的计时单位,根据相似三角形原理对合闸超前时间进行计算,快速、准确地捕捉合闸时机,实现发电机的自动准同期并网操作。在实训室电站的实际运行试验表明,此合闸方法可靠且装置成本低。
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