Design of Automatic Detection System for Relay Protection Tester
Relay protection tester is an important instrument for commissioning and inspection of relay protection devices.To further improve the testing accuracy,stability and testing efficiency of the relay protection tester,an automatic detection system for relay protection tester based on LabVIEW is designed.The system adopts LabVIEW modular programming ideas to realize the automatic testing,manual testing,saving reports and other functions of the relay protection tester.To solve the problem that the output of the relay protection tester is three-phase,while the multimeter and oscilloscope only support single-phase testing,an output conversion device is designed.Based on the conversion device,all wiring can be completed at once before the test starts,and the test circuit can be automatically switched according to different calibration items during the test.Functional test results show that the system can meet the requirements of inspection standardization,report standardization and closed-loop automatic testing.The system has a certain reference significance for the automatic detection and calibration of other secondary measuring equipment.
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