Make perturbation, in terms of these errors, to revise wave impedance mod-el until the errors reduce to minimum.
根据此误差，再作摄动，修改波阻抗模型，直到误差趋于最小为止。
When compliance with the minimum requirement of sensitivity of the detector has been thus determined, the added impedance, if any, shall be short-circuited.
最低灵敏度符合要求后，将附加电阻短接(如果有附加电阻)。
Through check, it is found that minimum excitation limit is calculated in P-Q plane, while impedance type loss-of-field protection is analyzed in R-X plane.
“发电厂并网运行安全性评价”要求验证低磁励限制与失磁保护的整定关系，在实际校核中，发现低磁励限制是在P-Q平面进行计算的，而阻抗型失磁保护是在R-X阻抗圆平面进行分析的。
Through check, it is found that minimum excitation limit is calculated in P-Q plane, while impedance type loss-of-field protection is analyzed in R-X plane.
“发电厂并网运行安全性评价”要求验证低磁励限制与失磁保护的整定关系，在实际校核中，发现低磁励限制是在P-Q平面进行计算的，而阻抗型失磁保护是在R-X阻抗圆平面进行分析的。
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