Smart Grid Socket Protection Circuit for Short Circuit Detection
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Solution Overview
Problem
Existing electrical device protection circuits for smart grids are complex and fail to quickly detect and respond to short circuits at the output of sockets, potentially damaging the device due to delayed circuit breaker responses.
Innovation Solution
A simple protection circuit with a detection unit, switch unit, and control unit that disconnects power from the electrical device upon detecting a short circuit, using a comparator, rectifier, and voltage distributor to compare and regulate signals, and a flip-flop circuit to delay reconnection after the short circuit is resolved.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a circuit breaker is used to protect the socket from short circuits, then the socket is protected from damage, but the response time is too slow causing delayed protection
Solution Approach 1:
The patent installs a protection circuit directly within the socket that proactively monitors the electrical state and immediately responds to short circuit conditions. The protection circuit includes detection components that continuously monitor for abnormal conditions and a switching component that can instantly disconnect power when a short circuit is detected, eliminating the delay inherent in traditional circuit breakers that operate at the distribution panel level.
2Speed
If a protection circuit is installed in the socket to detect short circuits quickly, then the response time is improved, but the device complexity increases
Solution Approach 1:
The protection circuit is segmented into distinct functional modules: a detection unit that monitors electrical parameters for short circuit conditions, and a switching unit that executes the disconnection action. This modular segmentation allows each component to perform its specific function efficiently while keeping the overall circuit design organized and manageable, reducing the perceived complexity despite the enhanced functionality.
Solution Approach 2:
The patent introduces an intermediary protection circuit that acts as a local guardian between the power source and the socket load. This intermediary layer provides intelligent monitoring and control, detecting abnormal conditions and mediating the disconnection process without requiring complex coordination with distant distribution panels, thus achieving fast response with relatively simple circuitry.
3Ease of manufacture
If existing protection circuits are applied without modification, then implementation is straightforward, but they cannot quickly detect and respond to short circuits at the output
Solution Approach 1:
The protection circuit is designed with universal applicability for socket installations while incorporating multi-functional capabilities: it continuously monitors for short circuits, provides immediate protective disconnection, and can detect the resolution of fault conditions. This universal design allows the same circuit architecture to be applied across different socket types and power ratings, achieving both ease of manufacture through standardization and reliable short circuit protection through its comprehensive monitoring and response capabilities.
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
Prevents electrical device damage by quickly disconnecting power during short circuits and delaying reconnection until the circuit is safe, ensuring the device's protection with a straightforward configuration.
Implementation Method 1
a comparator for comparing a neutral signal of the output power source of the electrical device with a neutral signal of a power signal input to the electrical device
Implementation Method 2
a rectifier for rectifying the neutral signal of the output power source of the electrical device
Implementation Method 3
a voltage distributor for stepping down a voltage level of an output of the rectifier
Data Source
AI summary
An electrical device protection circuit for a smart grid includes a detection unit for detecting whether or not the output power source of an electrical device short-circuits; a switch unit for connecting power, input to the electrical device, to the output power source of the electrical device or disconnect it therefrom; and a control unit for generating a control signal for making the switch unit disconnect the power input to the electrical device from the output power source of the electrical device. According to the electrical device protection circuit for a smart grid, a simply configured protection circuit, arranged in the electrical device, operates when the output power source of the electrical device short-circuits, whereby the electrical device may be prevented from being damaged.