Lightning Prediction Load Transfer for Power Grid Reliability
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Solution Overview
Problem
Current lightning protection methods for power grids are inadequate, particularly for transmission lines, leading to high costs, low success rates, lack of early warning, and large-scale power outages due to the randomness of lightning strikes and insufficient standby power supplies.
Innovation Solution
A load transfer method and system that predicts lightning strikes, allowing for the proactive transfer of loads from potentially affected transmission lines to standby lines, distributed micro-grids, or power storage devices before the strike occurs, utilizing a system comprising lightning detection, prediction, control, and executive modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all loads on a transmission line are transferred to standby power supply when lightning causes line tripping, then load continuity is maintained, but serious overload occurs on the standby transformer leading to expansion of the accident
Solution Approach 1:
The patent applies partial action by transferring only critical or important loads to standby lines when lightning causes line tripping, rather than transferring all loads. This selective approach maintains load continuity for essential services while preventing serious overload on the standby transformer, thereby avoiding expansion of the accident.
Solution Approach 2:
The patent applies local quality by differentiating between critical loads and non-critical loads, and selectively transferring only the critical loads to standby power supply. This ensures that load continuity is maintained where it matters most while avoiding overloading the standby transformer with non-essential loads.
2Reliability
If rigid processing approach is adopted where all equipment and loads are cut off when normal operation cannot be ensured, then safety is improved, but large-area power outage and economic losses occur
Solution Approach 1:
The patent applies preliminary action by detecting and predicting lightning strikes in advance, then proactively transferring loads before the lightning occurs. This allows the system to maintain safety by avoiding lightning-damaged lines while continuing to supply power to transferred loads, thereby preventing large-area power outages and reducing economic losses.
Solution Approach 2:
The patent applies dynamics by implementing a flexible, dynamic load management system that can adaptively transfer loads based on real-time lightning detection and prediction. Rather than rigidly cutting off all loads, the system dynamically redirects power flow to maintain supply to critical loads while avoiding damaged transmission lines.
3Strength
If standby power supply is rarely put into use due to high load rates on main and standby transformers during on-peak periods, then transformer overload is avoided, but load transfer capability is insufficient when lightning occurs
Solution Approach 1:
The patent applies preliminary action by proactively transferring loads from potentially lightning-affected transmission lines to standby lines before the lightning strike occurs. This advance load transfer allows the standby power supply to be utilized at appropriate load rates, avoiding both transformer overload and insufficient load transfer capability when lightning actually strikes.
Data Source
AI summary
Provided are a load transfer method and system in thunder and lightning weather. The method includes: detecting lightning and predicting a position and time of a lightning strike to obtain a lightning prediction result; determining a transmission line possibly struck by lightning in a power grid according to the lightning prediction result; determining a load transfer scheme; and before the lightning occurs, transferring at least part of loads on the transmission line possibly struck by lightning according to the load transfer scheme.