提高220 kV变电所三台主变输送容量的研究

为了达到既能满足主变N－1的要求，又能提高主变的供电能力的目的，针对杭州地区三台主变运行的220 kV变电所的实际运行情况，提出了当三台主变中有一台或两台主变跳闸后迅速地消除剩余主变过载运行的方法。通过进一步的分析，进而提出了110 kV母联开关备自投逻辑方案及过载联切装置的逻辑方案。该方法应用于杭州地区220 kV变电所收到了很好的效果，进一步提高了主变的输送电能力，保证系统的稳定性和可靠性。

Research on improving transport capacity of three transformers in 220kV substation

In order to achieve the requirements of transformer N-1 and improve transport capacity,o wing to the operation mode of 220kV substation in Hangzhou,an analysis is made of improving transport capacity especially when one or two transformers were cut off.Based on the above analysis,a method of BATS and transformer overload cutoff is put forward.T he method has been applied in 220 kV substation in Hangzhou district,thus the transport capacity and system stability and reliability are improved.