自动调谐动态补偿消弧系统的应用

Application of automatic tuning compensation arc suppression systems

介绍南京烷基苯厂配电系统大量采用电缆线路,单相接地电容电流可达几十安培,原来的中性点不接地方式现已不适用。采用ZDB-II型自动调谐动态补偿消弧装置避开谐振点的动态补偿方法,即在电网正常运行时,不施加励磁电流,将消弧线圈调谐到远离谐振点的状态,同时实时检测电网电容电流的大小,当电网发生单相接地故障时,瞬间(约20 ms)调节消弧线圈实施补偿。实践证明该装置投运后,运行正常,功效良好。

The distribution system of Nanjing Alkyl Benzene Plant used a large number of cables, which increased the single-phase ground capacitive current to several dozen. Therefore, the former neutral point unearth method became unappreciated. The dynamic compensation method that adopts ZDB-II automatic tuning compensation arc suppression device to avoid the resonance point is proposed. When the grid is normally operating, the excitation current will not be added and the arc suppression coil will be tuned to avoid the resonance point. At the same time, the grid＇s capaci- tive current should be checked. On the other hand, when the single-phase ground fault happens, the arc suppression coil will be adjusted during an instantaneous period （about 20 ms） to conduct compensation. Practice proves the device effective.