Decentralized Power Grid Current Regulation for Overload Selectivity
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Solution Overview
Problem
Decentralized energy systems face challenges in maintaining selectivity and preventing overloading, especially with the integration of renewable energy sources and bidirectional energy flow, leading to potential overloads and safety issues in micro-grids due to the complexity of managing power flows across multiple network participants.
Innovation Solution
A power grid with at least two feed points, incorporating current detection and regulation devices that can monitor and manage currents flowing in different directions, allowing for quick identification and mitigation of overloads by regulating consumer and producer usage, and potentially using AI for optimized power distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complete selectivity is ensured by dimensioning fuses and lines according to the sum of maximum currents from multiple feed-in points, then grid security and overload prevention are improved, but the infrastructure becomes excessively oversized during normal operation
Solution Approach 1:
The patent implements dynamic current regulation that adapts to real-time operating conditions. The system monitors actual current flows from multiple feed-in points and adjusts protection settings dynamically, allowing the grid to operate with optimized infrastructure capacity during normal conditions while maintaining enhanced security during abnormal conditions when the sum of maximum currents could cause overload.
2Quantity of substance
If partial selectivity is implemented to avoid oversizing during normal operation, then infrastructure costs are reduced, but grid areas become vulnerable to overloading when multiple feed-in points operate simultaneously
Solution Approach 1:
The patent employs feedback mechanisms through continuous monitoring of current flows from multiple feed-in points. The system detects when the sum of currents approaches dangerous levels and triggers regulatory actions to prevent overload, thereby maintaining grid security without requiring permanent oversizing of infrastructure capacity.
3Reliability
If conventional fuse protection is used at multiple feed-in points, then individual consumer protection is improved, but coordination between multiple protection devices becomes complex and selective operation cannot be guaranteed
Solution Approach 1:
The patent introduces a central control unit that acts as an intermediary between multiple protection devices at different feed-in points. This coordinator manages the interaction between protection devices, ensuring selective operation and proper coordination without requiring complex interconnections between individual protection devices, thereby maintaining consumer protection while reducing overall system complexity.
Data Source
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AI summary
The invention relates to a power grid (10) for a decentralized energy system, comprising at least one power distribution system (12) with at least two feed-in points (18), at least one current detection device (20), and at least one current regulation device (22), wherein the current detection device (20) is designed and configured to detect currents flowing in different directions into the power distribution system (12) at the feed-in points (18), and wherein the current regulation device (22) is designed and configured to regulate currents in the power distribution system (12) when at least one of the currents detected by the current detection device (20) exceeds a predetermined threshold value.