简化距离保护整定计算方法

分析了相间距离保护和接地距离保护定值的整定计算公式，发现在相同的计算条件下，即与相同的支路、相同的阶段配合，接地距离定一定小于或等于相间距离定值的规律，得出接地距离保护定值可以代替相间距离保护定值的结论，从而找到简化距离保护整定计算方法。

Discussion on Simplified Setting Calculation for Distant Protections

The setting calculation formulas for phase distant and grounding distant protections are analyzed.The rule is found that,under same calculation conditions,i.e.matching with same branches and same stages,the grounding distant setting value must be less than or equal to the phase distant setting value.Therefore,the conclusion is achieved that,the grounding distant setting value can replace the phase distant setting value.The simplified setting calculation method for distant protections is hence obtained.