Electric Furnace Power Supply with Hybrid Grid and Renewable Input
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional metal melting and heating plants relying on the public electricity grid face high energy costs, require continuous connection, and are vulnerable to blackouts, leading to production limitations and increased CO2 emissions.
Innovation Solution
A plant with an electric furnace and a power apparatus that includes a transformer, rectifiers, and converters, connected to both the electricity grid and an independent alternative energy source, such as renewable energy, allowing for partial or temporary disconnection from the grid and optimized energy usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the plant is continuously connected to the public electricity grid to ensure sufficient energy supply, then the reliability of energy supply is improved, but the energy costs increase and the plant becomes vulnerable to blackouts
Solution Approach 1:
The energy supply system is segmented into multiple independent sources: the public electricity grid and one or more alternative energy sources (such as solar panels, wind turbines, or diesel generators). This segmentation allows the plant to diversify its energy supply portfolio, reducing dependence on a single source and thereby lowering energy costs while maintaining reliability through redundancy.
Solution Approach 2:
The system dynamically changes the parameter of energy source selection based on availability, cost, and demand conditions. The control unit monitors the state of the grid and alternative sources, switching between them to optimize the balance between reliability and cost efficiency.
2Productivity
If the plant relies on the public electricity grid for high-power supply, then the productivity is improved, but the plant becomes vulnerable to shutdowns during blackouts
Solution Approach 1:
The plant is equipped with alternative energy sources that serve as a cushion against grid failures. These alternative sources are prepared in advance and can be activated immediately during blackouts, cushioning the impact of grid failures and preventing shutdowns, thereby maintaining productivity and reliability.
3Device complexity
If traditional power apparatuses are used with non-controllable current, then the device complexity is reduced, but the manufacturing precision of the melting process deteriorates
Solution Approach 1:
The power apparatus incorporates converters that enable dynamic control of the current supplied to the electric furnace. This dynamic control allows precise adjustment of electrical parameters during different process stages (perforation, melting, refining), improving manufacturing precision without excessively increasing device complexity, as the control is achieved through electronic conversion rather than mechanical means.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Reduces energy costs, enhances production flexibility, minimizes the risk of shutdowns due to grid failures, and decreases CO2 emissions by utilizing alternative energy sources.
Implementation Method 1
at least one transformer connected to an electricity grid and configured to receive an alternating primary electric voltage and an alternating primary electric current and transform them into an alternating secondary electric voltage and an alternating secondary electric current
Implementation Method 2
a plurality of rectifiers connected to the transformer and configured to transform the alternating secondary electric voltage and the alternating secondary electric current into a direct intermediate electric voltage and a direct intermediate electric current
Implementation Method 3
a plurality of converters connected on one side to the rectifiers, and on the other side to the furnace, and configured to convert the direct intermediate electric voltage and the direct intermediate electric current into an alternating supply voltage and an alternating supply current, to be supplied to the furnace
Implementation Method 4
electric furnaces in which the material to be melted is introduced... electric arc furnaces, ladle furnaces, and in general melting, refining, heating or induction furnaces
Implementation Method 5
induction melting furnaces or induction heating furnaces
Data Source
AI summary
A plant for melting and/or heating metal material includes a furnace, electrical energy feed means and an electric power apparatus connected between the feed means and the furnace; and a corresponding method to power the melting and/or heating plant.