Electric Power System Waveform Search Indexing
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Solution Overview
Problem
The existing methods for searching electric power system waveforms are inefficient, requiring hours or days to find relevant data due to the large volume of archived synchrophasor data, making it challenging to analyze and improve power system reliability and diagnose issues in a timely manner.
Innovation Solution
The development of indexing systems that create summaries of waveform data based on attributes like frequency, amplitude, and rate of change, allowing for high-speed searches by using multiple indexes with overlapping temporal segments, enabling users to specify multiple search criteria and focus on specific time periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional waveform search methods are used on archived synchrophasor data, then complete data analysis is achieved, but search time increases to hours or days
Solution Approach 1:
The patent applies preliminary action by pre-processing waveform data to extract and store key attributes (frequency, amplitude, rate of change, angle) in index structures before search operations. This allows the system to quickly retrieve relevant waveform segments without analyzing entire archived datasets, reducing search time from hours/days to minutes while maintaining measurement precision through attribute-based filtering.
Solution Approach 2:
The patent segments the continuous waveform data into discrete attribute components (frequency, amplitude, rate of change, angle) that can be independently indexed and searched. This segmentation enables the search system to filter data using multiple criteria simultaneously without processing the complete waveform dataset, significantly reducing search time while preserving data accuracy.
2Measurement precision
If multiple search criteria are applied to filter waveform data, then search precision is improved, but search complexity increases
Solution Approach 1:
The patent implements universality by creating a multi-functional index structure that handles multiple search criteria (frequency ranges, amplitude thresholds, rate of change limits, angle constraints) through a unified search interface. The index system simultaneously supports various attribute-based queries without requiring separate processing mechanisms, improving search precision while managing complexity through standardized attribute handling.
Solution Approach 2:
The patent applies parameter changes by transforming complex waveform data into standardized attribute parameters (frequency, amplitude, rate of change, angle) with defined ranges and thresholds. This parameterization enables precise multi-criteria filtering while simplifying the search system structure, as all search operations reduce to parameter range queries rather than complex waveform analysis.
3Adaptability or versatility
If comprehensive waveform attributes are indexed, then search capability is enhanced, but data processing overhead increases
Solution Approach 1:
The patent extracts only the essential waveform attributes (frequency, amplitude, rate of change, angle) needed for search operations, rather than processing and storing complete waveform data. This extraction approach enhances search flexibility by enabling multi-criteria queries while reducing data processing energy consumption by working with compact attribute representations instead of full waveform datasets.
Data Source
AI summary
The present disclosure relates to searching electric power system waveforms. Disclosed herein are various systems and methods for improving search performance through indexing electric power system waveforms using waveform attributes such as frequency, amplitude, angle, rate of change, and the like. According to some embodiments, multiple indexes may be used together to find information of interest. A reference signal may be utilized according to some embodiments. Normalizing a plurality of waveforms using a reference signal may facilitate the use of an index for comparing two arbitrary waveforms. This disclosure also relates to detecting and indexing islanding conditions in an electric power system. Various embodiments may utilize information relating to islanding conditions in connection with search operations.