In the research and development of active power filter,it was necessary to test and verify the circuit parameters and functional characteristics.At present,the acquisition system applied to the acquisition and research and analysis of the required test data could not meet the requirements of the whole development stage of the active power filter.In view of this situation,a data acquisition system which can be applied to research and development test and commissioned test was designed.The functions of real-time monitoring and abnormal alarm of active power filter were realized.It can automatically calculate the harmonic filtering rate,total harmonic filtering rate,response time,active power loss and other parameters.At the same time,the protection functions,such as AC input overvoltage and undervoltage protection,output overcurrent protection and current limiting protection,were verified.The experimental results showed that the acquisition system designed could meet the requirements of on-line monitoring of operational data and automatic calculation of characteristic parameters during the research and development of active power filter,and also be able to complete relevant standard test items.
