主变低压侧b相电流为零是什么原因造成的

主变低压侧b相电流为零是什么原因造成的

我觉得做变压器变比试验时不用将低压侧中性线接地，因为Y/y接线只是代表高压侧与低压侧绕组的接线方式，可以说明高低压侧之间的相位和向量关系，对变比没有影响，至于低压侧是否接地也只是代表在实际运行时中性点引线的连接方式，即接地或不接地，对于变比也不会产生影响。另外在变压器生产过程中高低压绕组的匝数比就决定了变比的大小，分接开关改变的就是高压侧接入的绕组数，从而可以改变低压侧的电压值。

要么是B相上没负荷，要么是变压器内部断线，

I think that the transformers do not change than the test line will be low-pressure side of the neutral ground, as Y / y wiring only on behalf of high-pressure side and low voltage winding of the cable side, it can be that high and low pressure side and the vector between the phase relationship between the ratio of no effect, as to whether the grounding of low pressure side is only representative of the actual run-time connection neutral point lead, that is grounded or not grounded, the change will not affect the ratio. In addition the transformer production process in high-than low-voltage winding turns ratio determines the size of the tap is to change the access to high-pressure side of the winding number, which can change the low voltage side.I think that the transformers do not change than the test line will be low-pressure side of the neutral ground, as Y / y wiring only on behalf of high-pressure side and low voltage winding of the cable side, it can be that high and low pressure side and the vector between the phase relationship between the ratio of no effect, as to whether the grounding of low pressure side is only representative of the actual run-time connection neutral point lead, that is grounded or not grounded, the change will not affect the ratio. In addition the transformer production process in high-than low-voltage winding turns ratio determines the size of the tap is to change the access to high-pressure side of the winding number, which can change the low voltage side.I think that the transformers do not change than the test line will be low-pressure side of the neutral ground, as Y / y wiring only on behalf of high-pressure side and low voltage winding of the cable side, it can be that high and low pressure side and the vector between the phase relationship between the ratio of no effect, as to whether the grounding of low pressure side is only representative of the actual run-time connection neutral point lead, that is grounded or not grounded, the change will not affect the ratio. In addition the transformer production process in high-than low-voltage winding turns ratio determines the size of the tap is to change the access to high-pressure side of the winding number, which can change the low voltage side.