Meter Socket Adapter for Sealed Microgrid Interconnection
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Solution Overview
Problem
Retrofitting existing meter combo load centers for interconnecting microgrids with utility grids is costly, labor-intensive, and disruptive, with challenges in installing microgrid interconnection devices (MID) due to sealed enclosures and lack of space for additional connections and metering equipment.
Innovation Solution
A meter socket adapter (MSA) and energy management system (EMS) facilitate the connection of a household microgrid to a utility grid by allowing MID installation without unsealing the load center, using conductors and CTs to measure current, and enabling efficient power management through EMS control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing meter combo load centers are retrofitted for microgrid interconnection, then microgrid integration is achieved, but installation cost and labor intensity increase significantly
Solution Approach 1:
A meter socket adapter is introduced as an intermediary device between the utility meter and the microgrid interconnection device. This adapter provides the necessary connection interfaces and mounting structure without requiring modification of the existing meter combo load center, thereby enabling microgrid integration while avoiding costly and labor-intensive retrofitting work
Solution Approach 2:
The microgrid interconnection system is segmented into modular components: the existing meter combo load center remains unchanged, while the meter socket adapter and microgrid interconnection device are installed as separate, additive modules. This segmentation allows for simplified installation and maintains the original functionality of the load center while adding new capabilities
2Reliability
If meter combo load center is sealed for security, then security is improved, but access for installing microgrid equipment becomes impossible
Solution Approach 1:
The meter socket adapter serves as an external intermediary that interfaces with the sealed meter combo load center through its meter socket opening. This allows the adapter to provide access points for microgrid equipment installation without compromising the sealed enclosure's security function, as the adapter itself becomes the secure interface point
Solution Approach 2:
The meter socket adapter is designed to nest within or attach to the existing meter combo load center structure. This nesting approach allows the adapter to utilize the existing sealed enclosure space while providing additional functionality for microgrid interconnection, maintaining security while enabling installation access
3Adaptability or versatility
If additional connections and metering equipment are installed, then microgrid functionality is enhanced, but installation time and space requirements increase
Solution Approach 1:
The meter socket adapter is designed with multi-functionality, integrating multiple connection terminals, mounting structures, and interface capabilities into a single device. This allows the adapter to provide all necessary connections and metering interfaces for microgrid functionality without requiring multiple separate installation steps or additional space-consuming equipment
Solution Approach 2:
Multiple functions previously requiring separate components (connection terminals, mounting structure, metering interfaces) are merged into the single meter socket adapter device. This consolidation reduces the number of installation steps, minimizes space requirements, and accelerates the overall installation process while maintaining full microgrid functionality
Data Source
AI summary
A meter socket adapter (MSA) connects a battery energy storage system (BESS) to a household microgrid through a meter combo load center. The MSA includes a first side for receiving an electricity meter, a second side opposite the first side, and a meter detection circuit. The second side is arranged to be inserted in a meter socket disposed at the meter combo load center. The meter detection circuit is arranged for detecting insertion or removal of the electricity meter and insertion or removal of the MSA, respectively. After it is detected the electricity meter is removed from the MSA, first conductors on the first side are de-energized. After it is detected the MSA is removed from the meter socket, second conductors at the meter socket are de-energized.