An application of maintaining constant grounding resistance by using a dspic

Grounding is the most important factor in electrical plants for safety of human and equipment. Although grounding systems are able to provide necessary safety, in the future these systems will be negatively affected by external factors such as climate changes and technical requirements. In order to prevent negative effects on the system created by high voltage leaking, grounding resistance should be checked periodically. Dangerous voltages on the devices can cause possible intolerable problems when periodic checking is ignored. The purpose of this study is the continuous measurement of grounding resistance at short periods and to keep it constant at certain value. So that obtained grounding resistance value based on grounding standards on power plants is preserved. Moreover necessary protection for people and equipment is carried out automatically. Finally, experimental results show that the grounding resistance is monitored and kept constant by the system designed.