Research on phase compensation of electronic transformer
Kun Liu · Dianli zidonghua shebei · 2007
A set of phase compensation methods based on the signal transfer principle of electronic transformer is presented.The cause of phase error in electronic transformer is analyzed.The phase-lead caused by Rogowski coil and time-delay in signal transferring from high voltage side to merging unit are defined and analyzed.A set of integrated compensation programs is designed based on phase errors above mentioned.A digital integral circuit with ADE 7759 is designed for com-pensating the led phase;a phase-shifted software algorithm realized in the merging unit DSP(Digital Signal Processor) is introduced for compensating the time-delay.The test shows its effectiveness.Potential problems in the program and their corresponding solutions are discussed.