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Improvement of the control performance of cable AC voltage withstand testers
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Improvement of the control performance of cable AC voltage withstand testers
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Journal Article
Improvement of the control performance of cable AC voltage withstand testers
2024
Overview
The traditional cable AC withstand voltage test device has poor control accuracy and slow protection performance, and the inverter based on power switching devices can be applied to the test device to effectively solve the above problems. However, the LCL-type inverter contains resonance, which tends to cause system destabilization and reduces current quality, affecting the effectiveness of the device for testing. Differential feedback filter capacitor voltage can solve the problem and can save a high-accuracy sensor, but the differential limits its application. This paper proposes to use the negative-band pass filter (NBPF) connected to lag correction (LC) link to equivalent the differential, and it can not only effectively suppress the resonance, but also can significantly suppress high-frequency noise. An experimental platform is built for validation.
Publisher
IOP Publishing
Subject
