Detecting device and detecting method for detecting output impedance angle of inverter
US9933468B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 27, 2016 |
| Grant date | Apr 3, 2018 |
| Priority date | — |
| Expiry date | May 27, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/44
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for detecting an output impedance angle of an inverter includes controlling an inverter to output a second voltage signal and a current signal based on a first voltage signal; receiving the signals, and calculating and outputting first and second active powers, and first and second reactive powers using the signals; calculating and outputting third and fourth active powers, and third and fourth reactive powers based on the first and second active powers, the first and second reactive powers, and the predetermined impedance angle; determining whether the amplitude is a constant value; if so, determining whether an absolute value of the first differential value of the third and fourth reactive powers is less than a first power reference value; if so, the impedance angle outputted from the inverter is the impedance angle; if not, setting the impedance angle as the predetermined impedance angle plus or minus the compensation angle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.