TRT发电机组长期允许负序电流估算

Estimation of Long-term-allowed Negative-sequence Current for TRT Generator Set

文章利用相量作图法对TRT发电机各种不对称运行状态下的负序电流值进行了比较分析,估算了发电机两相电流约相等且两相电流小于第三相电流时的负序电流,结果表明,在一定的负序电流限值下,发电机组所允许的电流不平衡量相对恒定,从而为监视发电机长期允许负序电流提供一个重要的参考数据。

In the paper, by phasor mapping method, the comparative analysis on the negative-sequence current value of TRT generator under various asymmetric operating conditions was carried out, and it was estimated that two phases of generator current were approximately equal and less than the negative-se- quence third-phase current, and the results showed that, within the certain limited value of negative-se- quence current, the allowed unbalance amount of generator set was relatively constant, thus providing a important reference data for the monitoring of long-term-allowed negative-sequence current of generator.