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多个海上采油平台通过海底电缆连接组成的小型电网系统中,因变压器的空载合闸和短路故障切除导致产生励磁涌流,会影响变压器投运失败、变压器继电保护误动作。励磁涌流诱发的一系列问题,严重影响了电网系统运行的稳定性。本文对南海某油田群海上平台电力组网中励磁涌流产生的原因,及在该电网中涌流抑制器的控制原理进行了分析,监测了涌流抑制的现场应用效果。
In a small-scale grid system composed of submarine cables connected by a number of offshore oil production platforms, excitation inrush current caused by no-load closing and short-circuit fault removal of transformers will affect failure of transformer operation and malfunction of transformer relay protection. A series of problems induced by magnetizing inrush current have seriously affected the stability of grid system operation. This paper analyzes the reason of the inrush current in the offshore power platform of a certain oilfield group in the South China Sea and the control principle of the surge suppressor in the power grid, and monitors the field application effect of the inrush suppression.