Balcony PV Inverter Communication Over Household Power Lines
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Solution Overview
Problem
The stability of communication connections between balcony photovoltaic system inverters and indoor preset devices is poor due to distance and obstacles, and existing solutions to improve this stability involve heavy wiring workloads.
Innovation Solution
A communication system using signal modulation and demodulation modules that utilize the existing power line as a carrier for data transmission, eliminating the need for additional communication lines and reducing wiring workload.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a communication extension line is used to improve communication stability, then communication connection stability is improved, but wiring workload increases
Solution Approach 1:
The patent utilizes the existing power line to serve dual purposes: both power transmission and data communication. By integrating communication functionality into the power distribution infrastructure, the system eliminates the need for separate communication extension lines while maintaining stable data transmission between the inverter and preset device.
Solution Approach 2:
The patent merges the power transmission function and data communication function into a single infrastructure (the power line). This consolidation allows data to be transmitted alongside electrical power through the same physical medium, thereby improving communication stability without requiring additional wiring.
2Ease of manufacture
If Wi-Fi module is used for data transmission, then wiring workload is reduced, but communication connection stability deteriorates
Solution Approach 1:
The patent introduces the power line as an intermediary medium for data transmission. Instead of relying on wireless Wi-Fi signals that are blocked by walls and distance, the system uses the existing power line infrastructure as a reliable physical medium to carry data signals from the inverter to the preset device, ensuring stable communication.
3Reliability
If communication extension line is installed, then communication connection stability is improved, but device complexity increases
Solution Approach 1:
The system leverages the existing power line infrastructure that is already present in the installation environment. By using this pre-existing infrastructure for both power and data transmission, the system avoids the need for additional communication cables and reduces installation complexity while maintaining reliable communication.
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
Stabilizes communication connections between the inverter and preset devices while minimizing wiring efforts, ensuring reliable data transmission and user experience.
Implementation Method 1
An output terminal of the signal modulation module is configured to couple an output terminal at an alternating-current side of the inverter, and output a modulated signal of the system data to a power line
Implementation Method 2
An input terminal of the signal demodulation module is configured to connect the household power distribution system and receive the modulated signal
Data Source
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AI summary
A balcony photovoltaic system and a communication system for the balcony photovoltaic system are provided according to the present disclosure, relating to the technical field of photovoltaics. The communication system includes a signal modulation module and a signal demodulation module. An input terminal of the signal modulation module is connected to a communication terminal of an inverter in the balcony photovoltaic system to receive system data of the inverter. An output terminal of the signal modulation module is coupled to an output terminal at an alternating-current side of the inverter, to output a modulated signal of the system data to a power line for connecting the output terminal at the alternating-current side with a household power distribution system. An input terminal of the signal demodulation module is connected to the household power distribution system to receive the modulated signal. An output terminal of the signal demodulation module is connected to a preset device to output a demodulated signal of the modulated signal to the preset device. According to the present disclosure, the stability of the communication connection between the inverter and the preset device is improved while reducing the wiring workload.