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Partial discharge detection under DC is an appropriate method for insulation condition estimation. This paper presented a DCPD measurement and analysis system. System, characterized by high signal to noise ratio and strong ability for interference suppression, was composed with narrowband RLC balanced detection circuit, gain-stable amplifier and band-pass filter. Through trigger acquisition, DCPD...
As for storage capacitor charged under DC and discharges with a large pulse, partial discharge detection under DC is fit for its work condition. The paper presents the principle and construction of a detecting instrument for DC partial discharge (PD) within storage capacitor as well as the results of the first stage experiments. In order to increase the sensitivity of measurement system for large...
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