Oil-Immersed Transformer Carbon Emission Calculation
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Solution Overview
Problem
Current methods for calculating carbon emissions from oil-immersed power transformers lack accuracy due to unconsidered factors like harmonic and three-phase imbalance losses, and temperature changes, as well as complex parameter requirements.
Innovation Solution
A method that calculates load power, three-phase current balance, and harmonic distortion rate using real-time monitoring data, then applies these parameters to formulas that account for temperature corrections and harmonic influences to determine electrical energy loss and subsequently carbon emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional carbon emission calculation methods are used, then the calculation process is simple, but the accuracy is low due to unconsidered harmonic and three-phase imbalance losses
Solution Approach 1:
The patent segments the carbon emission calculation into distinct components: base carbon emission calculation and correction terms for harmonic losses and three-phase imbalance losses. Each component is calculated separately using specific formulas and parameters, then combined to produce the final accurate carbon emission value. This segmentation allows the complex calculation to be broken down into manageable parts while maintaining high precision.
Solution Approach 2:
The patent introduces multiple correction parameters to account for harmonic distortion rates, three-phase current balance, and temperature effects. These parameters modify the base carbon emission calculation dynamically, allowing the system to adapt to varying operating conditions and achieve accurate carbon emission measurements under different load and environmental conditions.
2Measurement precision
If temperature corrections and harmonic influences are considered, then carbon emission calculation accuracy improves, but calculation complexity increases
Solution Approach 1:
The patent uses temperature correction coefficients and harmonic distortion parameters as intermediary factors that mediate between the base carbon emission calculation and the final accurate value. These intermediaries capture the complex effects of temperature and harmonics in a simplified manner, allowing the system to account for these factors without requiring overly complex direct calculations.
3Productivity
If real-time monitoring data is used for calculation, then carbon emission estimation becomes rapid and accurate, but data collection requirements increase
Solution Approach 1:
The patent leverages existing real-time monitoring data that is already being collected for transformer operation monitoring. The system uses readily available parameters such as voltage, current, and temperature from standard monitoring systems, eliminating the need for additional specialized measurement equipment. This self-service approach allows rapid carbon emission estimation using existing infrastructure.
Data Source
AI summary
A method for calculating carbon emissions of oil-immersed power transformer. The method includes: obtaining operation data of the oil-immersed power transformer; determining input parameters according to the operating data; the input parameters include: a load power P of the oil-immersed power transformer, a three-phase current balance ε, and a harmonic distortion rate THD; obtaining a top oil temperature Ttop of the oil-immersed power transformer; determining an average temperature Twnd and a temperature correction coefficient Ktemp of a winding of the oil-immersed power transformer according to the top oil temperature Ttop; determining an electrical energy loss S of the oil-immersed power transformer based on the input parameters, the average temperature Twnd, and the temperature correction coefficient Ktemp; determining the carbon emission G of the oil-immersed power transformer according to the electrical energy loss S.