Method for using one-phase photovoltaic grid-connected inverter to detect network voltage phase
A grid voltage and inverter technology, applied to the phase angle between voltage and current, instruments, measuring devices, etc., can solve the problems of poor phase-locking accuracy, inability to filter out harmonic interference, and poor phase-locking accuracy , to achieve the effect of strong anti-interference ability, good adaptability and quick response
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Example Embodiment
[0027] The specific method of its realization mainly has five steps: the first step is to filter the signal through the band-pass filter module. This filter has a great attenuation of the signal outside the resonant frequency. Use this feature to achieve the collected voltage signal Filter out harmonics and DC components. In the second step, the filtered signal Vα is passed through the quadrature signal generating module to generate a voltage signal Vβ lagging 90 degrees. The third step is to use the last estimated angle θ'to perform d-q transformation on Vα and Vβ, and perform the difference operation between the result Vq and 0. The fourth step is to do a proportional integral (PI) operation on the difference. In the fifth step, the calculation result in the fourth step and the base angular frequency of the power grid will be summed to obtain the estimated angular frequency of the power grid. The sixth step is to integrate the estimated angular frequency to obtain the estim...
PUM

Abstract
Description
Claims
Application Information

- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.
© 2023 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap