Power Distribution Box for Grid-Offgrid Switching

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Solution Overview

Problem

Existing power distribution equipment struggles to meet the requirements of both grid-connected and off-grid operations for new energy power generation without altering the original power distribution structure, leading to inefficiencies and safety concerns.

Innovation Solution

An apparatus and method for power distribution that includes a power regulating device with auxiliary components, allowing seamless switching between grid-connected and off-grid operations by altering the connection of ends, ensuring safe power supply and utilizing energy storage devices to stabilize power distribution.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If existing power distribution equipment is used without modification, then the original power distribution structure is maintained, but the equipment cannot meet the requirements of both grid-connected and off-grid operations

Engineering Contradiction:

Improveoperation mode adaptabilityVSAvoidpower distribution structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The power distribution box is designed to perform multiple functions: it can operate in grid-connected mode, off-grid mode, and hybrid mode, allowing a single device to adapt to different operational requirements without requiring separate equipment for each mode

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The power distribution system is divided into functional modules including switching components, control units, and distribution circuits, allowing independent optimization of each module while maintaining overall system adaptability across different operation modes

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If the power distribution structure is modified to support both grid-connected and off-grid operations, then operational requirements are met, but the original power distribution infrastructure must be changed

Engineering Contradiction:

Improveoperation mode adaptabilityVSAvoidinstallation complexity

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

A power distribution box serves as an intermediary device that interfaces between the existing power distribution infrastructure and the new energy power generation system, enabling dual operation modes without requiring modifications to the original infrastructure

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The power distribution box is pre-configured with switching mechanisms and control circuits during manufacturing, allowing it to be installed as a complete functional unit that immediately supports both grid-connected and off-grid operations without requiring complex on-site modifications

Inventive Principle:

Principle #10Preliminary action

3Reliability

If seamless switching between grid-connected and off-grid operations is implemented, then operational reliability is enhanced, but the device complexity increases

Engineering Contradiction:

Improvepower supply reliabilityVSAvoidswitching mechanism

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The control unit continuously monitors the operational status and grid conditions, automatically adjusting the switching state between grid-connected and off-grid modes based on real-time feedback, ensuring reliable power supply without requiring complex manual intervention

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The power distribution box incorporates automatic switching capabilities where the control unit independently manages the transition between operation modes based on pre-set criteria and real-time conditions, reducing the need for complex external control systems

Inventive Principle:

Principle #25Self-service

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 flexible and safe power supply to loads during both normal and abnormal AC power grid conditions without modifying the existing power distribution infrastructure, reducing costs and enhancing operational reliability.

Implementation Method 1

the power regulating device converts electrical energy of the power generation device

Methodology Applied

Scientific EffectElectrical energy conversion:

Implementation Method 2

a ground line of the second fixed end is grounded

Methodology Applied

Scientific EffectGrounding: Earthing

Data Source

PatentUS10992168B2Apparatus of power distribution and method of power distribution

Publication Date: 2021.04.27 DELTA ELECTRONICS (SHANGHAI) CO LTD

AI summary

The power distribution device includes a power regulating device and a first auxiliary power distribution component. The power regulating device has a first output end connected to an AC power grid and a second output end. The first auxiliary power distribution component has a first movable end electrically connected to a load, a first fixed end electrically connected to the AC power grid and a second fixed end electrically connected to the second output end, and a ground line of the second fixed end is grounded. When the AC power grid is normal, the first movable end is connected to the first fixed end, such that the AC power grid supplies power to the load. And when the AC power grid is abnormal, the first movable end is connected to the second fixed end, such that the power regulating device supplies power to the load through the second output end.