PV Inverter Theft Detection via Communication Line Monitoring
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Solution Overview
Problem
Existing methods for protecting photovoltaic systems from theft and damage are either costly, require significant installation effort, or disrupt the normal operation of the system, and existing monitoring solutions are not effective in promptly detecting irregularities.
Innovation Solution
A method that utilizes the existing communication infrastructure of a photovoltaic system to monitor DC/AC inverters and detect theft or damage without interrupting the system's operation, using a monitoring unit connected to the central communication unit via a data line to continuously check for deviations in device data and power supply, and sends alerts or restarts the system as necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If alarm systems with central monitoring are installed at a distance from the photovoltaic system, then security personnel can be notified of theft, but significant damage may already have occurred by the time they arrive on scene
Solution Approach 1:
The patent combines the monitoring function directly with the inverter by integrating a control unit that can detect theft attempts through monitoring the connection status of photovoltaic modules. This merges the security monitoring function into the existing system infrastructure, eliminating the need for separate distant monitoring systems and enabling immediate local detection and response.
2Reliability
If each photovoltaic module is equipped with a GSM unit for theft protection, then individual module theft can be detected, but considerable investment costs and ongoing connection costs are required
Solution Approach 1:
The patent makes the inverter's control unit serve multiple functions: it not only performs the inverter's primary power conversion control functions but also monitors the connection status of photovoltaic modules for theft detection. This multi-functionality eliminates the need for separate GSM units in each module, reducing both device complexity and costs while maintaining reliable theft detection capability.
3Reliability
If monitoring circuits are installed to detect theft of photovoltaic modules, then theft can be detected, but the regular operation of the photovoltaic system must be interrupted
Solution Approach 1:
The patent implements theft monitoring through continuous passive monitoring of the communication data lines that are already present in the system. The control unit continuously checks the connection status of photovoltaic modules without interrupting their operation or requiring separate monitoring circuits that would need to be activated, thus maintaining both theft detection capability and system availability.
Data Source
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AI summary
The invention relates to a method for securing interconnected electronic components, such as the DC/AC inverter of photovoltaic modules in photovoltaic systems, against theft. The invention aims to provide theft protection that requires no intervention in the control system of a photovoltaic system.This is achieved by specifying the number of faulty or missing DC/AC inverters (WR) and storing the specifications in the storage for operating and device data (SPG), checking a central communication line (KL) of DC/AC inverters (WR) at the input of a central communication unit (ZKL) of the photovoltaic system by querying the completeness of the connected DC/AC-DC/AC inverters (WR), such as the number of DC/AC inverters (WR) in operation, and notifying a central server via email and/or an alarm signal if a minimum number of DC/AC inverters (WR) are missing due to theft or damaged communication and data line (KL).