Breaking the limit of power capacitor resonance frequency with help of PD pulse spectrum to check and setup PD measurement.
AbstractsPartial discharge (PD) measurement is often performed without prior validation of the calibration pulse spectrum. In most cases, the correct frequency range for PD measurement is well known but measuring the pulse spectrum is a means to verfiy that the PD filter limit frequencies (f1, f2) fit the quasi-integration requirement according to IEC 60270. The pulse spectrum assists to detect wrong connections and defective parts as well as to verify the efficiency of HV noise suppression filters. In case of power capacitors, the resonance frequency is an essential parameter to correctly set the PD measurement frequencies in order to achieve adequate sensitivity as well as compliance with IEC 60270. This paper covers the theory and practical Information required to set the correct PD frequency range with respect to the power capacitor resonance frequency. It demonstrates that PD measurement with limit frequencies set beyond the resonance frequency of the power capacitor is possible if an identical capacitor is used as the PD coupling capacitor. Sensitivity issues when using bridge connections are discussed and PD detector and coupling impedance requirements are equally covered.
File Size: 547,1 KB
may download free of charge all publications including most recent ones
may download free of charge publications over three years old and purchase all publications
Designing HVDC grids for optimal reliability and availability performance
Control and automation systems for Electricity Distribution Networks (EDN) of the future
Voltage Source Converter (VSC) HVDC for Power Transmission - Economic Aspects and Comparison with other AC and DC Technologies
Update of Service Experience of HV Underground and Submarine Cable Systems
Recommendations for testing of long AC submarine cables with extruded insulation for system voltage above 30 (36) to 500 (550) kV (This TB replaces electra article ELT_189_1)
Integration of large Scale Wind Generation using HVDC and Power Electronics
For any questions in connection with the on-line library, contact:
Publications and Editions Manager