哈西一次变电所66kV电流相位比较式母差保护的改进建议

哈西一次变66kV电流相位比较式母差保护在运行母线故障时，母差保护元件不能快速地、有选择地将故障切除。通过对66kV电流相位比较式回路的局部改进或更换比率式母差保护，可提高66kV母差保护动作的可靠性和选择性。

Improvement of 66 Kv current phase comparative mother dilfereuce protection at Itarbin-W substation

In the case of operating bus failure, the 66 kV current phase comparative mother difference protection components failed to guickly cut off the failure on a selective basis. The reliability and selectivity of the 66 kV mother difference protection action can be improved by local modification of the comparative mother difference protection loop or changing the ratio mother difference protection.