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- W2388847292 abstract "Resistive current is an important AC measuring procedure of MOV(metal oxygen varistor).There are various measuring methods of resistive current,which includes hardware compensation method,harmonic analysis method,VCCT(variable coefficient compensation technique) and multi-coefficient compensation method.Currently,VCCT is a general method for measuring resistive current of MOV,but the compensation coefficients of VCCT are derived by the base current and voltage,the capacitive humonic components can not be compensated,the zero points of the resistive current and the added voltage of MOV can not superpose,and distortion in the V-I characteristic curve occurs,so the measuring error of MOV resistive current is caused inevitably.HCT(harmonic compensative technique) for measuring the resistive current of MOV is put forward,the capacitive harmonic current components can be subtracted from the leakage current.The quasi-synchronous sampling technique and DFT(disperse Fourier transform) technique are adopted to deal current and voltage signals,then the measuring error of signals,which include the amplitude and phase measuring errors of voltage and resistive current of MOV,is less than 5‰,effectively minimizing the spectrum leakage caused by non-integer period sampling.The experimental results show that the method can eliminate the resistive current measuring errors which are caused by harmonic voltage and lesson the sampling error caused by the fluctuation of power frequency,it can compensate the capacitive component of total leakage current of MOV almost completely,and it can make the resistance current has almost same phase as the acted voltage.The results of adopting the test and calibration circuit of standard resistance and capacitor and comparing the test results with FLUKE-45 digital multimeter reveal that the relative measuring error of resistive current of MOV is less than 1%.The measuring method can measure the resistive current precisely." @default.
- W2388847292 created "2016-06-24" @default.
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- W2388847292 date "2007-01-01" @default.
- W2388847292 modified "2023-09-26" @default.
- W2388847292 title "Investigation of Harmonic Compensation Technique for Measuring MOV Resistive Current" @default.
- W2388847292 hasPublicationYear "2007" @default.
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