Power Line Communication Crosstalk Suppression via Voltage Detection
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Solution Overview
Problem
In power line communication systems, crosstalk between high-frequency signals transmitted over multiple power lines in the same conduit leads to misoperation of devices, compromising the safety of electrical equipment due to incorrect signal paths and erroneous high-frequency signal reception.
Innovation Solution
A method and system for crosstalk suppression involving a power line communication transmitter and terminal that exchange identifiers through joining and acknowledgment messages, with voltage detection to ensure correct pairing and prevent malfunction, storing matching records to verify action instructions and avoid crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If multiple power lines are disposed in the same wire conduit to simplify field wiring, then wiring complexity is reduced and installation efficiency is improved, but coupling capacitance between power lines causes crosstalk of high-frequency signals
Solution Approach 1:
The patent applies preliminary action by establishing a pairing relationship between communication terminals and power line communication transmitters before actual communication occurs. The system performs matching and binding operations in advance, storing the paired identifiers in memory. This preliminary pairing ensures that when high-frequency signals are transmitted, each terminal only processes signals from its paired transmitter, effectively preventing crosstalk from affecting unpaired or incorrectly paired devices.
Solution Approach 2:
The patent implements feedback mechanisms through acknowledgment messages and voltage detection. When a terminal receives a joining response message, it sends an acknowledgment request message back to the transmitter. The transmitter detects voltage on the power line and responds with an acknowledgment response message only when voltage is within the preset range. This feedback loop confirms proper pairing and ensures that communication occurs only through the correct power line path, preventing crosstalk interference.
2Reliability
If multiple power lines are used to transmit high-frequency signals, then communication coverage and reliability are improved, but coupling capacitance provides wrong transmission paths causing signal misoperation
Solution Approach 1:
The system performs preliminary pairing and matching between communication terminals and power line communication transmitters before actual data transmission. The paired identifiers are stored in memory, creating a predetermined correct transmission path. This preliminary action ensures that even though multiple power lines exist physically, the system logically establishes only the correct transmission path for each terminal-transmitter pair, preventing signals from taking wrong paths through coupling capacitance.
Solution Approach 2:
The patent uses feedback mechanisms including acknowledgment messages and voltage detection to verify correct pairing. The transmitter detects voltage on the power line and only sends acknowledgment responses when voltage is within the preset range, confirming the power line is the correct transmission path. This feedback verification ensures that communication signals travel through the intended path and not through wrong paths created by coupling capacitance between adjacent power lines.
3Object-affected harmful factors
If identifier verification and voltage detection are performed before communication, then crosstalk suppression and device safety are improved, but communication establishment time increases
Solution Approach 1:
The patent performs identifier verification and voltage detection as preliminary actions during the joining process, before actual communication begins. The system matches identifiers, detects voltage within preset ranges, and stores paired relationships in advance. Although this takes additional time during the initial setup phase, it prevents crosstalk issues during subsequent communication operations, ensuring device safety and reliable operation throughout the system's operational lifetime.
Solution Approach 2:
The patent implements beforehand cushioning by performing thorough verification and detection operations before communication starts. The system cushions against potential crosstalk problems by establishing correct pairings and verifying voltage conditions in advance. This preliminary cushioning prevents harmful crosstalk effects during normal operation, trading initial setup time for long-term system safety and reliability.
Data Source
AI summary
Method, apparatus and system for crosstalk suppression of power line communication are provided. The method includes: receiving a joining request message; judging a matching state of the communication terminal based on a history matching record and communication terminal identifier, if matching state of the communication terminal is unmatched: sending a joining response message to the communication terminal; receiving an acknowledgment request message sent by the communication terminal after switch of the communication terminal is turned on; detecting voltage on power line between the communication terminal and an inverter corresponding to the power line communication transmitter, if voltage is within preset voltage range, sending an acknowledgment response message to the communication terminal; storing communication terminal identifier in history matching record and storing matching state of the communication terminal as successfully-matched. The method, apparatus and system can avoid malfunction of switch of the communication terminal during communication crosstalk.