Dual-Mechanism Switch Control for Fast Fault Clearance
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Solution Overview
Problem
Current medium-voltage circuit breakers experience high failure rates due to slow fault clearance, leading to economic losses and system damage, with over 85% of faults attributed to breaker operation failures, including mechanism deadlock, control part crashes, and short circuits.
Innovation Solution
A switch with a control system that manages two manipulating mechanisms at different speeds, enabling rapid fault clearance and improved grid stability through redundant operations, reducing the likelihood of switch operation failures and enhancing smart grid security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single manipulating mechanism is used in circuit breakers, then the device complexity is reduced, but the reliability of switch operation deteriorates due to high failure rates from mechanism deadlock, control part crashes, and short circuits
Solution Approach 1:
The patent divides the single manipulating mechanism into two independent manipulating mechanisms (first and second manipulating mechanisms) that can operate separately or cooperatively. Each mechanism has its own control circuit and driving force, allowing independent operation to perform opening and closing actions on the switch, thereby improving reliability through redundancy while maintaining manageable complexity through modular design
Solution Approach 2:
The patent applies different characteristics to different parts of the manipulating mechanisms - the first manipulating mechanism is designed for fast operation with a first operating time, while the second manipulating mechanism operates slower with a second operating time. This local differentiation allows the system to optimize for both speed and reliability in different operational contexts
2Productivity
If the opening action of circuit breakers is accelerated to clear faults quickly, then the productivity of fault clearance is improved, but the device complexity increases due to the need for multiple manipulating mechanisms with different operating speeds
Solution Approach 1:
The patent implements a dynamic control system that can selectively activate the first manipulating mechanism for fast opening operations when immediate fault clearance is needed, or rely on the second manipulating mechanism for normal operations. The control system dynamically adjusts which mechanism operates based on system conditions, enabling variable operating speeds without requiring both mechanisms to be equally complex
Solution Approach 2:
The patent pre-configures the two manipulating mechanisms with different operating characteristics before operation. The first manipulating mechanism is prepared for rapid response with pre-charged energy storage or pre-positioned components, while the second is configured for steady operation. This preliminary preparation allows instant switching between fast and normal operating modes without adding complex real-time control logic
Data Source
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AI summary
Provides a switch, comprising a control system (101), a first manipulating mechanism (102), and a second manipulating mechanism (103), wherein the control system (101) emits a first action instruction to the first manipulating mechanism (102) and a second action instruction to the second manipulating mechanism (103), respectively, the first action instruction being configured for instructing the first manipulating mechanism (102) to perform a first action, and the second action instruction being configured for instructing the second manipulating mechanism (103) to perform a second action; and the time taken by the first manipulating mechanism (102) to implement the first action is different from the time taken by the second manipulating mechanism (103) to implement the second action.