【摘要】 针对目前微机变压器保护中广泛使用的二次谐波制动原理的缺陷,介绍一种新的微机变压器保护方案。该方案将比值式电流制动作为变压器的主保护方案。利用变压器处于不同状态时差动电流的不同特性再引入不同的辅助判据进行鉴别。实验表明,其具有较好的动作特性。更多还原

【Abstract】 Aiming at the disadvantages of second harmonic restraint, a new transformer protection based on microprocessor is presented. The new method takes specific value formula restraint as main protection of transformer. It uses different characteristic of differential current of transformer and different auxiliary criteria to do the discrimination. The test shows that the new method has a good reliability.更多还原