Renewable energy source system having a high-frequency fault component based distance protection system
US11002780B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 2020 |
| Grant date | May 11, 2021 |
| Priority date | — |
| Expiry date | Dec 28, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E10/56
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A distance protection system and method based on a high-frequency fault component is provided for a renewal energy source (RES) system. The voltage drop caused by a fault has a full frequency of components and this can be extracted by a wavelet transform. A frequency selection principle that renders high-frequency impedance models a stable impedance phase angle is determined. On this basis, internal and external faults with respect to a transmission line are determined by comparing the magnitude of a high-frequency operating voltage with the magnitude of a high-frequency voltage at the fault point. This disclosed protection system and method can eliminate the influence of frequency offset and weak feed of the RES system by using high-frequency signals generated by voltage drops at the fault point, and can also tolerate signal noises and fault resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.