7VE6320-5EB99-0CA0 7VE6320-5EB92-0CA0 7VE6110-5EB92-0BB0
SIPROTEC 4 7VE61/63同期装置用于电网中开关同步检查或者电站中发电机同期并列操作。
“同频并网模式”要求电网中开关两侧的电压频率在足够长时间内几乎相同,此时表明两侧系统已经同步,因此允许相对较大的合闸角差。
“差频并网模式”主要应用于发电机的同期并列操作,此时机端电压和系统电压之间存在较大的频差,则只有在角差几乎为零的时刻允许合闸操作。7VE61/63提供自动准同期模式,即装置会根据实时的压差和频差自动调整发电机的励磁和转速,使之差值处于定值范围内。装置会提前一个开关合闸时间发出合闸命令,以便开关合闸时刻两侧相角重合。7VE61/63也提供手动准同期模式即用作同步检查继电器,此时装置会检查压差、频差和角差,在条件满足时发出允许合闸信号。
西门子同期装置7VE61/63在设计时考虑了的合闸安全。同期装置7VE61采用“一个半通道”理念,即只有在导前时间判据和同步检查判据同时满足的情况下才会发出合闸命令;而同期装置7VE63则采用“双通道”理念,即只有在导前时间判据和导前相角判据同时满足的情况下才会发出合闸命令。
7VE6110-2EB01-0CA07VE6110-2EB01-0CA07VE6110-2EB01-0CA07VE6110-2EB01-0CA07VE6110-2EB01-0CA0
7VE6110-2EB01-0CA07VE6110-2EB01-0CA0NUMERICAL SYNCHRONIZING UNIT
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