某电厂2#电锅炉变的保护开关定值优化评估

Optimization Evaluation of Protection Switch Setting for No.2 Boiler Transformer of a Power Plant

某电厂2#电锅炉供电方式发生改变后,在电锅炉空充时由于励磁涌流导致过流保护动作,多次发生跳闸。故重新进行保护核算,对相关保护定值优化评估,提高继电保护动作的可靠性、灵敏性、选择性、速动性的四性指标,保障电气一次设备安全稳定运行。

After the change of power supply mode of No.2 electric boiler in a certain power plant,during the electric boiler empty charging,inrush current caused the activation of overcurrent protection,resulting in repeated occurrence of tripping.Therefore,the present work conducted re-accounting of the protection,and optimized and evaluated the value setting of relevant constants of protection,so as to improve reliability,sensitivity,selectivity and speed of the relay protection action and ensure safe and stable operation of electrical primary equipment.