Communication Transformer Arc Detection in Direct Voltage Lines
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing direct voltage systems face challenges in detecting arcs, as previously known methods struggle to distinguish arc signals from noise, especially when arcs have low levels and do not exhibit transient changes, often requiring additional hardware.
Innovation Solution
The use of a communication transformer to transform both communication and arc signals, allowing a signal processing circuit to process secondary alternating currents for arc detection, thereby utilizing existing hardware and eliminating the need for additional transformers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If additional hardware is used for arc detection, then arc detection capability is improved, but device complexity increases
Solution Approach 1:
The communication transformer is designed to perform multiple functions: it transforms both communication signals and arc detection signals. By utilizing the existing transformer infrastructure for dual purposes, the patent eliminates the need for separate dedicated arc detection transformers, thereby reducing device complexity while maintaining arc detection capability.
2Reliability
If arc detection is implemented in direct voltage systems, then system safety is improved, but difficulty of detecting and measuring increases due to noise differentiation
Solution Approach 1:
The communication transformer acts as an intermediary device that transforms arc signals from the high-voltage direct voltage line to a lower-voltage secondary side where detection can be performed more safely and effectively. This intermediary transformation enables arc detection while maintaining system safety and facilitating signal differentiation from noise.
Solution Approach 2:
The patent replaces direct electrical measurement in the high-voltage domain with transformed electrical measurement in the low-voltage domain. By using the transformer to convert the measurement problem to a different electrical domain, the difficulty of detecting and measuring arc signals while maintaining safety is reduced.
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
This approach enables effective arc detection without additional hardware, allowing for timely and safe system shutdowns in direct voltage systems, such as photovoltaic systems, by differentiating arc signals from noise and communication signals.
Implementation Method 1
a communication transformer being provided which has a primary winding and a secondary winding
Implementation Method 2
the signal processing circuit being connected between a secondary winding of the secondary side and the arc detection unit, the signal processing circuit being designed to prepare a secondary alternating current which flows through the secondary winding for the arc detection unit
Implementation Method 3
an arc detection unit which is connected to the secondary winding of the secondary side and is designed to detect the transformed arc signal
Data Source
AI summary
The aim of the invention is to detect an arc in an assembly for transmitting a direct voltage. This aim is achieved by a communication transformer having a primary winding and a secondary winding, the secondary winding being connected to a transmitting device, which is designed to impress a communication signal onto the secondary winding of the communication transformer, and the primary winding being connected to one of the direct voltage lines in order to feed a communication signal transformed by the communication transformer to one of the direct voltage lines. In order to detect, in the assembly, the arc signal caused by an arc, the secondary winding is connected to an arc detection unit, which is designed to detect an arc signal transformed by the communication transformer.