Electric Power Calculation System Using Fourier Correction Coefficients
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Solution Overview
Problem
Existing computation systems for calculating electrical energy in alternating current systems are not optimal, as they rely on limited data sets and do not accurately account for voltage variations over time, leading to less precise energy calculations.
Innovation Solution
The system uses a correction coefficient based on the modulus of the Fourier series decomposition of voltage, applied to each phase where the voltage is greater than a threshold, to calculate electrical energy over multiple periods, enhancing precision without increasing data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a data set representative of measured voltage is determined based on a single selected voltage period, then the amount of data transmitted by radio waves is limited, but the accuracy of electrical energy calculation is reduced
Solution Approach 1:
The system performs preliminary action by determining a correction coefficient based on voltage measurements from multiple voltage periods before the actual energy calculation. This correction coefficient is then applied to compensate for voltage variations during the energy calculation process, thereby improving accuracy without requiring transmission of all raw voltage data.
Solution Approach 2:
The invention changes the parameter representation by introducing a correction coefficient that captures essential voltage variation characteristics. Instead of transmitting complete voltage waveforms or multiple period data sets, the system transforms voltage measurements into a corrected parameter set that maintains calculation accuracy while minimizing data transmission requirements.
2Measurement precision
If voltage measurements from multiple voltage periods are used to calculate electrical energy, then calculation accuracy is improved, but the quantity of data to be transmitted increases
Solution Approach 1:
The system extracts only the essential information needed for accurate energy calculation by determining a correction coefficient from multiple voltage periods. This coefficient captures the critical voltage variation characteristics without requiring transmission of the complete multi-period voltage data, thus separating the essential measurement information from the redundant data.
Solution Approach 2:
The correction coefficient is calculated in advance based on voltage measurements from multiple periods, allowing the system to account for voltage variations without transmitting the actual multi-period data. This preliminary processing of voltage information enables accurate energy calculation with minimal data transmission.
Data Source
AI summary
This system comprises a first device comprising a member for measuring voltage of a primary conductor, means for sampling the measured voltage, means for transmitting a first message, and means for determining a set of variable values representative of the voltage, based on the voltage measured during a given transmission period; at least one second device having a current sensor for determining intensity in a secondary conductor connected to the primary conductor, means for sampling the measured intensity; and a member for calculating said energy, including means for receiving the first message and being configured for calculating an energy during the given transmission period on the basis of said data set and intensity samples associated with the given transmission period.The determination means are configured for determining said data set based on a correction coefficient which depends on a value representative of the voltage only for each voltage period where said value is greater than a threshold.