变压器空载合闸，会产生较高的励磁涌流，造成变压器合闸失败，甚至引起发电机出口断路器误动作。为提高变压器合闸成功率，保证海洋平台主电站安全运行，需要抑制励磁涌流。介绍了励磁涌流的产生原因及海洋平台常用的三种抑制励磁涌流的方法： 相控合闸、软启动、预充磁技术。对比分析了这三种方法的优缺点及其在海洋平台上的应用情况。
Transformer no-load closing may cause large inrush current. This large current may cause the fail of transformer closing and the malfunction of generator vacuum circuit breaker (VCB). In order to improve the success rate of transformer closing, and thus to ensure the safe operation of offshore platform, it is essential to suppress inrush current. The cause of inrush current is introduced, and three common suppression methods including phase control, soft start and pre-magnetizing technology are described. The advantages and disadvantages of these methods, as well as their applications in offshore platforms, are compared briefly.
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