Converter Wiring Error Detection via Output Voltage Matching
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Solution Overview
Problem
Existing methods for detecting wiring errors in combiner systems of converters are inadequate, particularly when voltage information at the combiner point cannot be obtained, as they require additional modules and are not compatible with all combiner devices, leading to high reconstruction costs and inefficiencies.
Innovation Solution
A detection method and apparatus that utilize a primary controller to compare output port voltage signals of converters, determining if they meet a preset matching relationship, allowing for quick and accurate identification of wiring errors without relying on voltage information from the combiner point, by designating one converter as a master and others as slaves, and using wireless or wired communication to assess voltage signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If voltage information at the combiner point is used to detect wiring errors, then detection accuracy is improved, but device complexity increases because the combiner device needs voltage detection modules
Solution Approach 1:
The patent uses the output port voltage signals of converters as intermediary measurements instead of directly measuring at the combiner point. By comparing voltage signals from individual converter output ports, the system can indirectly detect wiring errors without requiring voltage detection modules at the combiner device, thus maintaining detection accuracy while reducing device complexity
Solution Approach 2:
The patent replaces the need for physical voltage detection modules at the combiner device with a computational approach. The primary controller collects voltage signal data from converters and performs computational comparison to detect wiring errors, substituting hardware detection with software-based analysis
2Difficulty of detecting and measuring
If voltage detection modules are added to combiner devices to enable wiring error detection, then detection capability is improved, but reconstruction costs increase
Solution Approach 1:
The patent enables converters to perform self-detection of wiring errors by having them provide their output port voltage signals to the primary controller. The system uses existing converter components for detection purposes, eliminating the need for additional detection modules and associated reconstruction costs
Solution Approach 2:
The primary controller serves multiple functions: it manages converter operations and simultaneously performs wiring error detection by analyzing voltage signals. This multi-functionality eliminates the need for separate detection modules, reducing reconstruction costs while maintaining detection capability
3Measurement precision
If traditional voltage comparison method is used, then detection accuracy is improved, but ease of operation deteriorates because it requires obtaining voltage information from combiner point which is not always available
Solution Approach 1:
Instead of measuring voltage at the combiner point and comparing with converter outputs, the patent inverts the approach by measuring voltage at converter output ports and comparing those signals. This inversion makes the detection method universally applicable since all converters have accessible output ports, eliminating the limitation of combiner point accessibility
Data Source
AI summary
A detection method and a related apparatus. Whether a first converter and a second converter are connected to a same combiner device is determined by determining an output port voltage signal of the first converter and an output port voltage signal of the second converter, so that first information or second information is generated and notified to staff. Generally, if a first converter and a second converter in a combiner system are not connected to a same combiner device, it may be considered as that a wire connection of the first converter or the second converter is incorrect. In the detection method and the related apparatus, whether there is a wiring error in the combiner system of the converters can be quickly and accurately determined in an application scenario in which voltage information at a combiner point cannot be obtained.