Split-Bus Electrical Panel With MID for Backup Load Isolation
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Solution Overview
Problem
Residential photovoltaic systems with battery back-up struggle to efficiently power critical loads during utility power outages, requiring separate backup panels and relocation of critical loads, which is cumbersome and inefficient.
Innovation Solution
A single split-bus electrical panel with back-feed circuit breakers and a Microgrid Interconnection Device (MID) allows for isolation of critical loads from standard loads, using renewable energy and battery back-up power to supply critical loads during outages, with a relay system and outage detector ensuring seamless power transition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate back-up panel is installed for critical loads, then critical loads can be powered during utility outages, but the system complexity and installation difficulty increase
Solution Approach 1:
The patent combines the main service panel and critical loads back-up panel into a single integrated split-bus electrical panel. The bus system is divided into a first bus for non-critical loads and a second bus for critical loads, allowing both functions to coexist in one panel without requiring separate installations.
Solution Approach 2:
The integrated electrical panel serves multiple functions: it handles utility power distribution to all loads, manages photovoltaic system integration, provides battery back-up for critical loads, and enables seamless switching between power sources. This multi-functional design eliminates the need for separate dedicated back-up panels.
2Adaptability or versatility
If critical loads are relocated to a separate back-up panel, then power allocation during outages is possible, but installation and maintenance difficulty increase
Solution Approach 1:
The patent integrates critical loads management directly into the main service panel through a split-bus configuration. Circuit breakers are organized into first and second groups corresponding to non-critical and critical loads, respectively, allowing power allocation during outages without relocating loads to a separate panel.
Solution Approach 2:
The electrical panel is segmented into distinct bus sections for non-critical and critical loads, with dedicated circuit breakers for each group. This segmentation enables selective power distribution during outages while maintaining a single integrated panel structure that is easier to install and maintain than separate panels.
3Use of energy by moving object
If photovoltaic system with battery back-up is integrated, then auxiliary power is available during outages, but the system complexity increases
Solution Approach 1:
The integrated electrical panel universally handles multiple power sources (utility and photovoltaic) and multiple load types (non-critical and critical loads) through a unified control architecture. The system automatically manages power flow from any source to any load based on availability and priority, simplifying the integration complexity.
Solution Approach 2:
The patent merges the photovoltaic system integration, battery back-up functionality, and load management into a single electrical panel structure. The controller coordinates all power sources and loads within one system, reducing the complexity that would arise from separate distributed systems.
4Ease of operation
If a single integrated panel is used, then installation is simplified, but isolating critical loads during outages becomes more difficult
Solution Approach 1:
The electrical panel is segmented into distinct bus sections with dedicated circuit breakers for critical and non-critical loads. This segmentation provides clear physical and electrical separation that simplifies load isolation during outages, despite the integrated panel structure. The controller can easily identify and isolate critical loads by controlling the specific circuit breakers associated with the second bus.
Data Source
AI summary
An apparatus provides a single split-bus electrical panel with back-feed circuit breakers arranged to allow connection of a Microgrid Interconnection Device (MID) for isolation of a critical loads section from a standards loads section during back-up operation due to a utility power outage. A first panel section of the split-bus electrical panel supplies power to non-critical standards loads in a residence. A second panel section of the split-bus electrical panel supplies power to critical loads in the residence, which must continue to be powered during a utility power outage.