变压器差动保护校验辅助计算的LabVIEW实现

LabVIEW realization of auxiliary calculation for transformer differential protection verification

针对中石化西北油田分公司广泛使用的35 kV主变压器(接线组别Y/D-11)和南自PST641U差动保护装置的保护原理,利用LabVIEW软件开发了变压器差动保护校验辅助计算软件,该软件通过输入保护定值、电源和变压器等参数,能够自动计算出保护校验时仪器所加电流值,并绘制出对应的比率制动曲线,可大大提高变压器差动保护装置校验的正确性和效率。

According to the protection principle of 35 kV main transformer(wiring group Y/D-11)and PST641U differential protection device widely used in our unit,the auxiliary calculation software for transformer differential protection verification is developed by using LabVIEW software.The software can automatically calculate the current value added by the instrument during protection verification and draw the corresponding ratio rate braking curve by inputting protection setting value,power supply,transformer and other parameters,can greatly improve the correctness and efficiency of transformer differential protection device verification.