Resampling Signal for Synchrophasor Measurement
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Solution Overview
Problem
Existing systems face challenges in consistently measuring power quality parameters and synchrophasor measurements across various power systems operating at different frequencies, making it difficult to perform accurate and efficient analysis.
Innovation Solution
A method and system that utilize zero crossing detection to determine even angle positions and fundamental frequency, allowing for resampling of signals to produce an even angle signal, which is then used for power quality and synchrophasor analysis, sharing processing resources for both measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate processing resources are allocated for synchrophasor measurement and power quality analysis, then measurement accuracy is improved, but device complexity and cost increase
Solution Approach 1:
The patent combines synchrophasor measurement and power quality analysis processing resources into a single shared processing unit. The resampling algorithm is implemented once and shared between both measurement types, eliminating the need for separate processing hardware while maintaining measurement accuracy through unified signal processing.
Solution Approach 2:
The processing resources are designed to perform multiple functions - the same resampling algorithm and processing circuitry are used for both synchrophasor measurement and power quality analysis. This multi-functional approach allows a single system to handle different measurement requirements without duplicating hardware resources.
2Reliability
If separate processing resources are allocated for synchrophasor measurement and power quality analysis, then measurement reliability is improved, but hardware cost increases
Solution Approach 1:
The patent merges the processing resources for both measurement types into a single unified system. By implementing a shared resampling algorithm and processing pipeline, the hardware cost is reduced while measurement reliability is maintained through consistent signal processing for both synchrophasor and power quality measurements.
Solution Approach 2:
The processing resources are designed with universal functionality to handle both synchrophasor measurement and power quality analysis reliably. The same processing circuitry and algorithms serve both measurement purposes, reducing hardware duplication and cost while ensuring reliable measurements through unified processing standards.
3Speed
If signals are processed without resampling at even angle positions, then processing speed is improved, but measurement consistency across variable frequencies deteriorates
Solution Approach 1:
The patent applies resampling at even angle positions as a preliminary processing step before performing synchrophasor measurement or power quality analysis. This pre-processing ensures that the signal is properly aligned and normalized for subsequent measurements, achieving consistent results across variable frequencies without requiring complex real-time processing adjustments.
Solution Approach 2:
The resampling process changes the sampling parameters of the input signal to produce an even angle signal with normalized angular positions. This parameter transformation ensures that subsequent measurements are performed on a consistently formatted signal, improving measurement consistency across different input frequencies while maintaining efficient processing through a standardized output format.
Data Source
AI summary
Performing power quality and synchrophasor analysis on a resampled signal. A first signal may be initially received which corresponds to a power system. The first signal may have a plurality of cycles and may have a frequency that varies over time. One or more parameters may be determined from the first signal. Based on the one or more parameters, the first signal may be resampled to produce an even angle signal. Various power quality measurements may be performed on the even angle signal. Similarly, further processing may be performed to perform synchrophasor measurements, e.g., to determine phasor, frequency, and/or rate of frequency change for the first signal. In some embodiments, the resampling processing elements (e.g., circuitry, programmable hardware elements, processors and memories, etc.) may be shared between the two analyses.