Converter Output Voltage Matching for Combiner Wiring Errors
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Solution Overview
Problem
Existing methods for determining wiring errors in combiner systems of converters are inadequate when voltage information at the combiner point cannot be obtained, leading to potential system damage and inefficiencies due to incorrect connections.
Innovation Solution
A detection method using a primary controller to compare output port voltage signals of converters, determining matching relationships to identify correct or incorrect connections without relying on voltage information from the combiner point, and generating specific information for staff to rectify errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If voltage information at the combiner point is used to determine wiring errors, then the accuracy of wiring error detection is improved, but the device complexity increases due to requiring voltage detection modules in combiner devices
Solution Approach 1:
The patent extracts the voltage detection function from the combiner device and relocates it to the converter device. The combiner device no longer needs voltage detection modules, reducing its complexity. Instead, the converter device detects voltage information at its own output end and uses this information to determine wiring errors, achieving the same detection accuracy without adding complexity to the combiner device.
Solution Approach 2:
The patent introduces an intermediary approach where the converter device acts as both the power source and the detection device. Rather than requiring the combiner device to detect voltage, the converter device detects voltage at its output end and uses this information to infer wiring correctness, eliminating the need for additional detection modules in the combiner device.
2Reliability
If voltage detection modules are added to combiner devices to enable wiring error detection, then the reliability of the system is improved, but the ease of manufacture deteriorates due to additional hardware requirements
Solution Approach 1:
The patent removes the requirement for voltage detection modules from combiner devices, simplifying their structure and making them easier to manufacture. The detection functionality is extracted and performed by the converter device using its existing voltage detection capabilities, maintaining system reliability without adding manufacturing complexity to the combiner device.
Solution Approach 2:
The converter device performs self-detection of wiring errors by using its own voltage detection capabilities to monitor voltage information at its output end. This self-service approach eliminates the need for separate detection modules in the combiner device, maintaining reliability while simplifying manufacturing.
3Measurement precision
If the converter shuts down to perform wiring error detection, then the accuracy of detection is improved, but the productivity deteriorates due to system downtime
Solution Approach 1:
The patent performs wiring error detection as a preliminary action during the system startup phase, before the converter begins normal operation. By detecting wiring errors in advance during startup, the system avoids the need to shut down during operation, maintaining high productivity while ensuring accurate detection of wiring errors before they can cause damage.
Solution Approach 2:
The patent implements periodic wiring error detection at scheduled intervals (e.g., during startup or maintenance windows) rather than requiring continuous shutdowns. This periodic approach ensures accurate detection while minimizing disruption to system productivity, as the converter operates normally between detection cycles.
Data Source
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AI summary
A detection method and a related apparatus are provided. Whether a first converter and a second converter are connected to a same combiner device (101 or 102) 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 (101 or 102), 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 (103 or 104) cannot be obtained.