Abstract
In the previous study, we proposed an adaptive pulse separation algorithm to separate the pulse-shaped interferences in frequency-tuned resonant (ACRF) tests. However, the interference separation effect of this algorithm was limited in the long test cable and low interference amplitude condition. In this study, a double-sensor detection method is proposed to suppress pulse-shaped interference generated by ACRF systems, to realize the partial discharge (PD) measurement for long cable equipment. First, the transmission characteristics of pulse interference in the ACRF system are analyzed. Then, the principle of the double-sensor-based PD detection technology is introduced; this entails simultaneous using an antenna to acquire the interference of the variable-frequency source and a high-frequency current transformer to collect the PD signals and interference at the test object, then realizing the interference suppression by calculating the intersection of the time series of the two sets of pulse signals. Finally, the effectiveness of the proposed method is validated by performing ACRF tests on a 400-m cable. The experimental results show that this method can effectively realize the suppression of pulse-shaped interference in long-cable ACRF tests. The proposed method provides a feasible way for noise suppression in intense pulse-shaped interference environments.
Published Version
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