Design of Grounding Resistance Monitoring and Alarm System Based on Task Mechanism
At the present stage,the grounding resistance monitoring system has the problems of long preparation time,complicated process,unstable data transmission,high false alarm rate,as well as low degree of automation,intelligence and informatization,etc.For different forms of grounding,a grounding resistance monitoring and alarm system based on task mechanism is designed.The system consists of type Ⅰ moxitoring node and type Ⅱ monitoring node,pulse-isolated power supply equipment and center monitoring and alarm software.A distance-based threshold judgment optimization algorithm is proposed.Under the test conditions,the false alarm rate can be effectively reduced by more than 50％when the difference between the measured value and the standard value is about±1％of indication.A quarterly system application validation of the system is conducted in a key facility.The application results show that the system operates reliably and stably for a quarterly and can complete individualized and customized tasks.The system can meet the demand for intelligent monitoring and alarm of regional multi-point grounding resistance.
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