Abstract
The measurement of weak DC signal is the key technique for on-line DC monitoring system with XLPE power cables to improve its measurement accuracy. Designs of the key units in measuring circuit for weak DC signal and a design of digital filter were developed. The measuring circuit was examined, and the results of examination show that the measuring circuit can detect 1 nA DC current, and the average error is less than 2%, which agrees the requirement of on-line DC monitoring system with XLPE power cables for DC signal measurement.
| Original language | English |
|---|---|
| Pages (from-to) | 356-358 |
| Number of pages | 3 |
| Journal | Gaoya Dianqi/High Voltage Apparatus |
| Volume | 44 |
| Issue number | 4 |
| State | Published - 2008 |
Keywords
- Measuring circuit
- On-line monitoring
- Weak DC signal
- XLPE power cable
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