一种新型数控高频开关恒电位仪的研制与应用

Development and Application of a Novel Digital Control High-Frequent Switch Potentiostat

动态直流杂散电流干扰会导致管道电位持续波动,传统恒电位仪以“恒电位”模式运行时无法根据管道保护电位进行实时调整,阴极保护效果不理想。介绍了一种以断电电位为控制电位运行的新型数控高频开关恒电位仪,并在某管道进行了现场测试。测试结果表明:配合土壤管测量断电电位,新型恒电位仪在动态直流杂散电流干扰下控制电位准确、调整实时、运行平稳,显著提升了线路的阴极保护效果。

The interference of dynamic direct current(DC)stray current leads to continuous fluctuation of cathodic protection potential.Traditional potentiostat cannot adjust in real time according to pipeline protection potentials when it operates in"potentiostatic"mode,so the cathodic protection effect is not ideal.A novel digital control high-frequency switch potentiostat using off-potential as control potential in operation was introduced.Then it was tested in a running pipeline.The results showed that the novel potentiostat could control potentials accurately,adjust in real time and run smoothly under the interference of dynamic DC stray current in cooperation with off-potential measurement with soil tubes.As a result,the effect of cathodic protection was significantly improved.