Plasma-Based Electrical Fault Mitigation for Arc Flash Safety
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Summary
Problems
Standard circuit protection devices, such as fuses and circuit breakers, do not react quickly enough to mitigate arc flashes, which can cause significant damage due to the rapid release of energy, heat, light, and pressure waves, and current levels during electrical faults.
Innovation solutions
An electrical fault mitigation system that includes a containment chamber with electrodes and a plasma gun to emit ablative plasma, creating an electrical arc to discharge energy from the fault, and voltage limiter devices to prevent voltage thresholds from being exceeded, thereby preventing secondary arcs.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If standard circuit protection devices (fuses and circuit breakers) are used, then the system has simple structure and low cost, but the response time is too slow to mitigate arc flashes effectively
Why choose this principle:
The plasma gun is pre-positioned within the switchgear enclosure, ready to emit plasma at the moment of fault detection. This preliminary positioning allows the system to respond immediately to arc flash conditions without the mechanical delay of deploying protection components, achieving microsecond-level response times while maintaining relatively simple system architecture
Principle concept:
If standard circuit protection devices (fuses and circuit breakers) are used, then the system has simple structure and low cost, but the response time is too slow to mitigate arc flashes effectively
Why choose this principle:
The invention replaces mechanical protection devices (fuses and circuit breakers) with a plasma-based electrical system. The plasma gun emits ionized plasma that creates a conductive path to divert fault current, eliminating the need for mechanical moving parts and enabling significantly faster response times without proportionally increasing device complexity
Application Domain
Data Source
AI summary:
An electrical fault mitigation system that includes a containment chamber with electrodes and a plasma gun to emit ablative plasma, creating an electrical arc to discharge energy from the fault, and voltage limiter devices to prevent voltage thresholds from being exceeded, thereby preventing secondary arcs.
Abstract
An electrical fault mitigation system includes a mitigation device (202) including a containment chamber (214) defining a cavity (226), a first electrode (220) positioned within the cavity and coupled to a first conductor (112), and a second electrode (222) positioned within the cavity and coupled to a second conductor (114). The mitigation device also includes a first voltage source, and a plasma gun (216) positioned within the cavity and configured to emit ablative plasma using the first voltage source to discharge energy from an electrical fault. The system also includes a first voltage limiter device (206) configured to limit a voltage of the first conductor from increasing above a predetermined threshold to prevent a second voltage source from generating a second electrical arc between the first electrode and the second electrode when the second voltage source applies a voltage across the first electrode and the second electrode.