Controllable Circuit Breakers for Backup Power Switching
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Solution Overview
Problem
Existing electrical systems require an automatic transfer switch (ATS) to safely transition to a local generation source during utility power outages, introducing additional cost and complexity, and limiting flexibility in determining which loads receive backup power.
Innovation Solution
A system with controllable circuit breakers, including a main breaker and branch breakers, controlled by a control component that isolates the load panel from the utility grid, activates the local generation source, and dynamically manages load demand to match local generation supply capacity without the need for an ATS.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an automatic transfer switch (ATS) is used to switch between utility power and local generation source, then safe transition during power outage is achieved, but device complexity and cost increase
Solution Approach 1:
The patent divides the circuit breaker system into multiple independently controllable segments (main breaker, LER breaker, and individual branch breakers) that can be controlled separately through communication signals. This segmentation eliminates the need for a single complex ATS while maintaining safe transition capabilities through coordinated control of individual breaker segments.
Solution Approach 2:
The patent makes conventional circuit breakers multi-functional by equipping them with communication capabilities to receive and execute control signals. The breakers can now perform both their traditional circuit protection function and the additional function of controlled switching between power sources, eliminating the need for a separate ATS device.
2Reliability
If an automatic transfer switch (ATS) is used to switch between utility power and local generation source, then safe transition during power outage is achieved, but cost increases
Solution Approach 1:
The patent uses communication signals (electrical, wireless, or other forms) as a copy/representation of the control command to operate the breakers, rather than using complex mechanical or electrical switching mechanisms like ATS. This information-based control approach significantly reduces hardware costs while achieving the same safe transition objective.
Solution Approach 2:
The patent replaces the expensive ATS with relatively inexpensive controllable circuit breakers that use standard communication protocols. The control system uses low-cost communication signals and standard breaker components rather than specialized expensive switching equipment.
3Reliability
If predetermined load profiles are used to configure backup power distribution, then safety is ensured, but flexibility in determining which loads receive backup power is lost
Solution Approach 1:
The patent enables dynamic control of individual branch breakers through communication signals, allowing the system to adaptively determine which loads receive backup power based on real-time conditions such as local generation source availability, load priority, and power demand. This dynamic control replaces static predetermined configurations while maintaining safety through coordinated breaker operation.
Solution Approach 2:
The control component receives information about power outage conditions, local generation source status, and load requirements, then uses this feedback to intelligently determine which branch breakers should be closed to supply backup power. This feedback mechanism enables flexible, condition-based load management while ensuring safe operation.
Data Source
AI summary
An apparatus (215) for managing an electrical system (200) includes a main breaker (220) structured to be coupled to a utility source (205), an LER breaker (240) structured to be coupled to a local generation source (245), a number of branch breakers (230), each branch breaker being structured to be coupled to one or more loads (235), and a control component (250). The control component is structured to, in response to a determination that the utility source is experiencing a power outage: cause the main breaker to be opened, determine which one or more of the number of branch breakers are to receive backup power from the local generation source, cause the branch breakers to be configured such that only the determined one or more of the number of branch breakers are in a closed condition, and cause the local generation source to be activated.