Constant-frequency variable dot power grid harmonic wave detection method and admeasuring apparatus thereof
A technology of harmonic detection and power grid cycle, applied in spectrum analysis/Fourier analysis, etc., can solve the problem of difficulty in reducing synchronization error, and achieve the effect of reducing harmonic measurement error, improving real-time performance, and no delay.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment Construction
[0026] Below in conjunction with accompanying drawing, the technical scheme of invention is described in detail:
[0027] like figure 1 As shown, the fixed-frequency variable-point harmonic measuring instrument includes two special components: (1) fixed-frequency full cycle sampler: with a constant sampling frequency f S The grid voltage (current) waveform is sampled, and each data window is controlled by a zero-crossing detector to be very close to S full cycles; (2) Variable point DFT calculator: when the grid frequency fluctuates, the number of sampling points of each data window is variable , designed a 'change point DFT calculator'.
[0028] like figure 2 As shown, the fixed-frequency full-cycle sampler includes an analog / digital converter, a zero-crossing detector and a DSP, the variable-point DFT calculator includes a programmable on-chip system and memory, and the fixed-frequency variable-point harmonic measuring instrument also includes three voltage mutual inducta...
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, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com