2021年5月21日晚上110KV海正电气部门於薇发现变电所在22:2

On the evening of May 21, 2021, 110KV Hisun Electric Department Yu Wei discovered that all the substations were losing power at 22:29:39, and the whole plant resumed power transmission at 22:29:59. The power loss time was 20 seconds. <br><br><br>The most likely cause of this deviation is that during the automatic load reversal of the 1# main transformer switch and the 2# main transformer switch, although the 10 KV circuit breakers of the #1 and #2 main transformers were put into use at the same time, it may be due to electrical appliances. Individual differences in component performance, 1# main transformer circuit breaker due to long service life, performance degradation, unqualified operating indicators, when the 2# main transformer switch is disconnected, 1# main transformer circuit breaker trips because it cannot carry all the load. Electricity causes this deviation to occur.

On the evening of May 21, 2021, the 110kV Haizheng electrical department found that the substation was lost at 22:29:39, and the power was restored at 22:29:59, and the power loss time was 20 seconds.<br>The most likely reason for this deviation is that during the process of load switching between 1 main transformer and 2 main transformer, although 10kV circuit breaker of main transformer 1 and 2 main transformer is put into use in the same period, it may be due to the individual difference of electrical component performance. 1. The main transformer breaker is not qualified due to its long service life, poor performance and unqualified operation index. When 2 main transformer switch is off, 1. The main transformer breaker tripped and lost power because it could not bear all the load, which led to this deviation.<br>

On the evening of May 21, 2021, Yu Wei, 110KV Haizheng Electric Department, found that the substation lost power at 22:29:39, and the whole plant resumed power transmission at 22:29:59. The power loss time was 20 seconds.The most likely cause of this deviation is that the 10 KV circuit breakers of the #1 and #2 main transformers were put into use at the same time during the load self-reversing process of the 1# and 2# main transformer switches, but it may be due to the individual differences in the performance of electrical components. Because of the long service life, the performance of the 1# main transformer circuit breaker declined and the operation index failed. When the 2# main transformer switch was turned off, the 1# main transformer circuit breaker tripped and lost power because it could not bear all the loads.