直流去耦合器对管道断电电位测量的影响
直流去耦合器的影响
固态直流去耦合器电容充放电会导致断电电位测量误差。当管道通电时，固态直流去耦合器电容充电，当管道断电时，固态直流去耦合器电容放电，该电流将流到管道上，影响管道断电电位测量。当固态直流去耦合器电容较小，交流电压降大，且单向导通装置具有不平衡的电压导通值时(或接地较材料与管道有较大的直流电位差，如铜裸线接地较)，固态直流去耦合器也会有交流整流作用，影响断电电位测量精度。
Influence of DC decoupler on measurement of pipeline outage potential
Influence of DC decouplerThe charging and discharging of solid-state DC decoupler capacitor will lead to the measurement error of power-off potential. When the pipeline is powered on, the solid-state DC decoupling capacitor is charged. When the pipeline is powered off, the solid-state DC decoupling capacitor is discharged, and the current will flow to the pipeline, affecting the measurement of the pipeline power-off potential. When the capacitance of the solid-state DC decoupler is small, the AC voltage drop is large, and the unidirectional conduction device has an unbalanced voltage conduction value (or there is a large DC potential difference between the grounding electrode material and the pipeline, such as the bare copper wire grounding electrode), the solid-state DC decoupler will also have an AC rectification function, which affects the measurement accuracy of the power-off potential.
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