The Design of Mine High Voltage Intelligence Switch
|School||Liaoning Technical University|
|Keywords||Zero-sequence active power Selective Reliability Sensitivity AVR Microcontroller|
Existing protection devices for Qianjiaying Mine selective leakage protection function failure of the design is developed with leakage protection function of high voltage intelligent switch , overload , short circuit and monitoring to reduce failure blackouts range , easy to find fault shorten the outage time , improve the reliability of the power supply . This paper analyzes the resonant power grid operation mode suppression coil grounding the neutral point , research and analysis based on the zero-sequence active power selective leakage protection principle . From the perspective of power system structure , signal sampling device performance and electromagnetic compatibility , discusses the impact protection device reliability and sensitivity of the main factors to guarantee the reliability and sensitivity should be noted that the problem to determine the active power election line selective leakage protection hardware structure , the software calculation method , and through software correction system integrated angular error method , developed based on the AVR high speed microcontroller and CAN bus intelligent protection system . After the experimental test , the system achieved selective leakage protection and other protection functions .