Spring-Driven Bypass Switch for Fast STATCOM Sub-Module Shorting
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Solution Overview
Problem
Existing bypass switches for STATCOM and HVDC systems are large and inefficient, unable to rapidly short-circuit abnormal sub-modules to prevent failure propagation, which affects operation reliability and increases costs.
Innovation Solution
A bypass switch design incorporating a switch body with a sliding part, driven latch, driving latch, stopper, pressure bearing, and elastic body, utilizing a solenoid and spring mechanism for rapid operation, with a compact structure to reduce size and manufacturing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a coil is used to generate electromagnetic force for operating the switch, then the switch can be operated, but the size of the coil increases and the switch size increases, and the switch cannot be operated at high speed
Solution Approach 1:
The patent replaces the electromagnetic coil system with a mechanical spring-driven system. The spring is pre-compressed to store mechanical energy, and when triggered, it rapidly releases this energy to drive the switch contacts, eliminating the need for a large electromagnetic coil and achieving high-speed operation.
Solution Approach 2:
The spring is pre-compressed before operation to store potential energy in advance. This preliminary action allows the switch to operate at high speed when triggered, as the energy is already prepared and only needs to be released, rather than generating energy in real-time through a large coil.
2Loss of time
If a circuit breaker with stoppers and rollers is used for tripping, then the tripping function is achieved, but the size increases and the circuit breaker cannot be operated in a short time
Solution Approach 1:
The patent extracts and eliminates the complex stopper-roller mechanism from the traditional circuit breaker design. By removing this bulky tripping mechanism and replacing it with a streamlined spring-driven system, the overall size is reduced while achieving faster operation times.
Solution Approach 2:
The patent employs a dynamic spring-driven mechanism that can rapidly transition from a compressed state to an extended state, enabling the switch to operate in a very short time. This dynamic system is more compact and faster than the static stopper-roller mechanism.
3Reliability
If a large-sized bypass switch is used, then the switch can handle high voltage, but the manufacturing cost increases and manufacturing convenience decreases
Solution Approach 1:
The patent changes the design parameters by using a compact spring-driven mechanism instead of a large electromagnetic coil system. This allows the switch to maintain high voltage handling capability through optimized insulation and contact design while significantly reducing the overall size, which lowers manufacturing costs and improves ease of manufacture.
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
Enables rapid short-circuiting of abnormal sub-modules to ensure operation reliability, reduces switch size and manufacturing costs, and enhances operational efficiency.
Implementation Method 1
utilizing a solenoid and spring mechanism for rapid operation
Implementation Method 2
utilizing a solenoid and spring mechanism for rapid operation
Data Source
AI summary
Techniques are described for a bypass switch that includes: a switch body having a column; a switch head which is coupled to the column and in which a sliding part is provided; a sliding part which is inserted into the switch head; a driven latch which is inserted into the sliding part and fixed to a driving shaft penetrating therethrough; a driving latch which is coupled to an end of the driving shaft exposed to an outside of the switch head, and which is provided to be driven by a solenoid; a stop coupled to the front of the switch head; a pressure bearing which is inserted into a lower portion of the sliding part and coupled thereto by a bearing pin; an elastic body provided between the sliding part and the switch body; and a rod coupled to an upper portion of the sliding part.