Power Grid Oscillation Source Identification for Rapid Suppression
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Solution Overview
Problem
Existing methods struggle to identify the generation source of unstable oscillations in power systems in real-time, leading to potential power failures due to delayed identification and ineffective suppression strategies.
Innovation Solution
A power system operation assisting device and method that utilizes multi-signal frequency identification and generation source assurance testing to quickly identify and validate the generation source of unstable oscillations, enabling immediate suppression actions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If Fourier analysis is used to identify oscillation frequency, then the generation source can be identified in the oscillation frequency domain, but it requires a long analysis window and takes time to identify the generation source
Solution Approach 1:
The patent pre-calculates and stores transfer impedance characteristics and oscillation source candidate information before actual oscillation events occur. When oscillation is detected, the system immediately queries pre-computed data based on oscillation frequency, eliminating the need for time-consuming real-time analysis and enabling instant generation source identification.
Solution Approach 2:
The patent creates a library of pre-computed transfer impedance characteristics and oscillation source candidate data that can be quickly referenced. Instead of performing complex calculations during actual oscillation events, the system copies and retrieves pre-analyzed data patterns that match the current oscillation frequency, significantly reducing identification time.
2Loss of information
If offline analysis is used to identify generation source, then past unstable oscillation data can be analyzed, but it is impossible to identify the generation source of unknown unstable events occurring online
Solution Approach 1:
The patent implements a feedback mechanism where the system continuously monitors oscillation events, identifies generation sources using pre-computed data, validates results through assurance tests, and updates the oscillation source candidate information in the library. This allows the system to adapt to new oscillation patterns and unknown events while maintaining the benefits of pre-computed analysis.
Solution Approach 2:
The patent transitions from static offline analysis to a dynamic hybrid approach where pre-computed data structures are combined with real-time oscillation monitoring and adaptive updates. The system dynamically queries pre-computed libraries based on real-time oscillation frequency and updates candidate information as new patterns are learned, enabling both historical data utilization and adaptability to unknown events.
3Productivity
If generation source candidates are calculated without assurance testing, then identification speed is improved, but the identification may be inaccurate leading to useless operation
Solution Approach 1:
The patent pre-calculates and stores transfer impedance characteristics and oscillation source candidate information before oscillation events occur. This preliminary preparation enables rapid querying and identification during actual events while maintaining high accuracy through pre-validated data, eliminating the need for time-consuming assurance tests during critical suppression operations.
Data Source
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AI summary
This power system operation assisting device is provided with: a multiple signal frequency specifying unit that uses, as inputs, measured data of an object to be measured and a frequency specifying parameter for calculating a frequency component of the measured data to calculate an oscillation frequency; a generation source candidate calculation unit that uses, as an input, the calculated oscillation frequency to calculate a generation source candidate of an unstable oscillation occurring in a power system; a generation source guarantee test unit that calculates the guarantee test result of the generation source candidate; and a display unit that displays the oscillation frequency, the generation source candidate, and the guarantee test result.