Alarm Module for Distributed Generator Disconnection Detection
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Solution Overview
Problem
Distributed Generator (DG) systems, particularly solar power systems, face challenges in detecting when components are disconnected, leading to potential theft and safety issues due to their outdoor and modular nature.
Innovation Solution
An alarm module is electrically coupled to conductive components within the DG system, monitoring a minimal current flow and generating notifications upon changes, which indicates disconnections, using a ground rod system for grounding and continuous power supply from both inverters and the commercial grid.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If solar power systems are deployed in outdoor and isolated locations with modular components, then renewable energy generation capability is improved, but vulnerability to component theft and disconnection increases
Solution Approach 1:
The system performs preliminary actions by continuously monitoring current flow through PV modules before theft or disconnection can occur. The alarm module detects abnormal current changes and triggers notifications in advance, preventing loss of components and enabling rapid response to potential theft attempts.
Solution Approach 2:
The system implements feedback by monitoring the actual current flow from PV modules and comparing it against expected operational ranges. When disconnection or theft occurs, the system provides immediate feedback through alarm notifications to the monitoring center, enabling real-time response and reducing vulnerability to harmful factors.
2Object-affected harmful factors
If monitoring systems are added to detect component disconnection, then security against theft is improved, but system complexity and cost increase
Solution Approach 1:
The alarm module serves multiple functions: it monitors current flow for theft detection, provides system diagnostics, and enables rapid response to failures. By combining these functions into a single integrated module, the system achieves effective theft prevention without proportionally increasing complexity.
Solution Approach 2:
The monitoring system leverages the existing operational current from PV modules as the monitoring signal, eliminating the need for separate power supplies or additional sensors. The system monitors itself using its own operational parameters, reducing overall system complexity while maintaining effective theft detection capability.
3Measurement precision
If continuous monitoring of current flow is implemented, then detection of disconnected components is improved, but energy consumption increases
Solution Approach 1:
The system uses the operational current from PV modules themselves as the monitoring signal, eliminating the need for separate monitoring power sources. The same current that powers the system also provides the monitoring function, achieving continuous detection without additional energy consumption.
Solution Approach 2:
The system monitors changes in current flow parameters rather than maintaining constant active monitoring. By detecting deviations from normal operational current ranges, the system achieves high detection accuracy while consuming minimal energy, as monitoring occurs passively through existing operational parameters.
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
Effectively alerts users and authorities of disconnected components, preventing theft and ensuring safety by continuously monitoring current flow and providing a fail-safe heartbeat signal for operational verification.
Implementation Method 1
couples a monitoring current to the conductive portion, monitors flow of the monitoring current to determine a change in the flow
Implementation Method 2
electrically coupled to a conductive portion of a component within the DG, wherein the conductive portion is grounded via a ground rod system
Data Source
AI summary
A method and apparatus for indicating a disconnection within a Distributed Generator (DG). In one embodiment, the apparatus comprises an alarm module electrically coupled to a conductive portion of a component within the DG, wherein the conductive portion is grounded via a ground rod system, and wherein the alarm module (i) is further coupled to a ground line, (ii) couples a monitoring current to the conductive portion, (iii) monitors flow of the monitoring current to determine a change in the flow, and (iv) generates, as a result of the change in the flow, a notification of the disconnection.