Dynamic Electricity Feed Control for Grid Safety
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Solution Overview
Problem
Existing systems for controlling electricity feeds from renewable sources into household grids are limited by safety concerns, leading to reduced energy output due to fixed circuit reserves, and lack fail-safe mechanisms to prevent overheating, especially when external control signals fail.
Innovation Solution
A method and system that use a controller integrated with an electric power converter to dynamically adjust electricity feeds based on installation parameters and real-time load measurements, ensuring the temperature of the electric circuit remains below a maximum threshold by providing a defined feed duration and switching to safe modes if external signals are lost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electricity feed is limited to the permanent circuit reserve to ensure safety, then the electric circuit does not overheat, but the electricity generation from renewable sources cannot be fully utilized
Solution Approach 1:
The patent implements dynamic control of the electricity feed by continuously monitoring the actual load consumption and adjusting the feed-in power accordingly. The controller dynamically calculates the available circuit reserve as the difference between actual load consumption and fuse nominal current, allowing the electricity feed to vary over time rather than being fixed at a conservative permanent reserve level. This resolves the contradiction by enabling high productivity when load demand is high while maintaining safety through continuous monitoring and adjustment.
Solution Approach 2:
The system changes the operating parameter of electricity feed from a fixed permanent circuit reserve value to a variable value based on real-time load conditions. By monitoring parameters such as actual load consumption, ambient temperature, and feed duration, the system adapts the electricity feed parameter to maximize utilization while staying within safety boundaries defined by thermal constraints and fuse ratings.
2Productivity
If the electricity feed is increased above the permanent reserve to utilize more renewable energy, then more electricity can be fed into the grid, but the electric circuit may overheat causing safety hazards
Solution Approach 1:
The patent implements a feedback control mechanism where the controller continuously monitors the actual load consumption, ambient temperature, and feed duration, then adjusts the electricity feed accordingly. The system calculates the available circuit reserve in real-time and modulates the inverter output to ensure the circuit temperature remains below the maximum threshold. This feedback loop enables increased productivity while preventing overheating by constantly adapting the feed-in power to current thermal conditions.
Solution Approach 2:
The system incorporates protective measures by monitoring ambient temperature and calculating thermal constraints before exceeding safe operating limits. The controller predicts the thermal state of the circuit based on current conditions and adjusts the electricity feed in advance to prevent overheating. This prior cushioning approach allows the system to operate closer to safety boundaries without actually exceeding them, thereby maximizing productivity while preventing harmful overheating effects.
3Ease of operation
If external control signals are used to manage electricity feed, then the system can be operated remotely, but the system lacks fail-safe mechanisms when external control fails
Solution Approach 1:
The patent implements self-service control where the controller autonomously monitors load consumption, calculates available circuit reserve, and adjusts the electricity feed without requiring continuous external control signals. The system independently accesses installation parameters such as fuse nominal current and ambient temperature, then automatically modulates the inverter output based on real-time conditions. This self-service capability ensures fail-safe operation because the system continues to function safely even when external control communication is lost, resolving the contradiction between remote operability and reliability.
4Productivity
If the maximum load of the electric circuit is used to increase electricity feed, then more renewable energy can be utilized, but the maximum load conditions are usually very short or hardly met
Solution Approach 1:
The patent implements periodic monitoring and adjustment of the electricity feed based on actual load conditions. Instead of operating at fixed maximum capacity for brief periods, the controller continuously monitors load consumption and periodically adjusts the feed-in power to match available circuit reserve. This periodic action ensures that the system operates at optimal levels throughout extended periods, utilizing the full available capacity whenever load conditions permit while automatically reducing feed-in when load demand decreases, thereby resolving the contradiction between productivity and duration.
Data Source
AI summary
The invention relates to a method for controlling an electricity feed to an electricity grid (12) from a load side of an electric circuit (5), comprising the steps of: a) Providing a electricity feed with an associated feed duration to a controller (13) of an electric power converter (7); b) The controller (13) commissioning the electric power converter (7) to provide the electricity feed, until the electricity feed and feed duration is provided anew or until the feed duration expires. The invention further relates to a system for controlling an electricity feed of an electric source.