A parameter estimation method of simultaneous sampling signal generated by optical current transducer

LIU Minghao, YUAN Yanhong
(Faculty of Mechanical Engineering & Automation, Zhejiang SciTech University, Hangzhou 310018, China)

Abstract: Aiming at meeting the demand of digital grid，optical electronic transformer which is used for real time supervising of AC becomes a new research subject. In order to calculate AC, the parameters were estimated of its own output which is small sine signal after optical electronic transformation. Depending on the technology of simultaneous sampling, a series of points can be found. A method was introduced based on least square method, these points were utilized to calculate the parameter of sine signal and it was improved with recursive leastsquare(RLS). This method was proved by the program of LabVIEW, and the relative error was calculated.
Key words: optical current transducer; parameter estimate; least square; recursive leastsquare(RLS); LabVIEW