A smart grid-oriented electric energy metering information real-time transmission method
Patent Information
- Application Number
- CN202610701901.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-05-21
- Publication Date
- 2026-06-23
AI Technical Summary
When multiple meters are connected in a dense manner using power frequency communication, the superposition of current pulses causes dynamic offset of the zero-crossing point, making the absolute time reference of each energy meter inaccurate. At the same time, load changes and harmonic distortion cause the pulse delay time to deviate from the preset value, and the decision interval for the receiver to distinguish adjacent bit values is insufficient, resulting in degradation of signal identification reliability when multiple meters are connected concurrently.
The bit information is carried by the ratio of the duration of the injected segment to the duration of the silent interval, replacing the dependence on the absolute delay time of the zero-crossing point of the power frequency voltage. The ratio coding of the modulation unit resists the power frequency periodic scaling and harmonic distortion at the time domain envelope level. The receiver achieves synchronous acquisition and data restoration by matching the ratio sequence.
This method fundamentally eliminates the impact of dynamic zero-crossing offset caused by the superposition of multiple meter pulses, widens the decision interval at the receiver, enables concurrent separation and restoration of multiple meter signals, and improves the reliability of signal identification.
Smart Images
Figure CN122269172A_ABST