Method and device for online limit early-warning to shunt capacitor bank
US10742027B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 25, 2018 |
| Grant date | Aug 11, 2020 |
| Priority date | — |
| Expiry date | Nov 3, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J3/1864
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for online limit early-warning to a shunt capacitor bank, and the method comprises: performing harmonic monitoring to the shunt capacitor bank; obtaining a measured voltage and a measured current, based on raw data obtained by the harmonic monitoring; obtaining a first parameter representing a ratio of the measured voltage to a rated voltage and a second parameter representing a ratio of the measured current to a rated current, based on the measured voltage and the measured current; obtaining a relation between an impedance correlation quantity of the shunt capacitor bank and a background harmonic voltage ratio, based on the first parameter, the second parameter, and an obtained series reactance ratio of a detected capacitor circuit; and performing online limit early-warning to the shunt capacitor bank, based on the relation. The present invention also discloses a device for online limit early-warning to a shunt capacitor bank.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.