Integrated Voltage Transformer Calibration for Analog-Digital Switching
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Solution Overview
Problem
The calibration of voltage transformers is complex and costly due to the need for multiple devices, making it impossible to complete calibration with a single device, which affects the operational reliability and measurement accuracy of converter stations in direct-current power transmission systems.
Innovation Solution
A digital-analog integrated voltage transformer calibration system that includes a direct-current high voltage generator, signal conversion module, digital quantity acquisition module, processing module, and synchronization module, allowing for calibration of both analog and digital voltage signals using a single system without device replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If three different calibration devices are used for continuous switching to calibrate voltage transformer, then both analog and digital voltage signals can be calibrated, but the calibration process becomes complex and calibration cost increases
Solution Approach 1:
The patent merges the functions of three separate calibration devices (analog voltage signal calibration device, digital voltage signal calibration device, and standard voltage signal source) into a single integrated calibration device. This unified device can calibrate both analog and digital voltage signals by switching between different calibration modes, thereby simplifying the calibration process and reducing device complexity while maintaining adaptability.
Solution Approach 2:
The calibration device is designed with multi-functionality to perform both analog voltage signal calibration and digital voltage signal calibration using a single device. The device includes switching circuitry and control logic that enables it to adapt its calibration method based on the input signal type, making it a universal calibration solution that eliminates the need for multiple specialized devices.
2Adaptability or versatility
If three different calibration devices are used for continuous switching, then both analog and digital voltage signals can be calibrated, but calibration cost increases
Solution Approach 1:
By combining the functionality of three separate calibration devices into one integrated device, the patent reduces the total number of devices required from three to one. This consolidation directly reduces calibration cost by eliminating redundant hardware purchases, maintenance expenses, and operational overhead associated with managing multiple separate calibration systems.
Solution Approach 2:
The universal calibration device performs both analog and digital voltage signal calibration functions that previously required three separate devices. This multi-functional approach reduces calibration cost by providing a single-point solution that covers all calibration needs, thereby reducing overall system expenditure on calibration equipment.
3Device complexity
If a single calibration device is used, then calibration process is simplified and cost is reduced, but it is impossible to complete calibration of both analog and digital voltage signals
Solution Approach 1:
The calibration device incorporates dynamic switching capability that allows it to adapt its calibration mode based on the type of voltage signal being calibrated. The device can dynamically switch between analog voltage signal calibration mode and digital voltage signal calibration mode, enabling a single device to handle both calibration types effectively while maintaining process simplicity.
Solution Approach 2:
The calibration device changes its operational parameters based on the input signal type. When calibrating analog voltage signals, it uses analog calibration parameters and methods; when calibrating digital voltage signals, it switches to digital calibration parameters and methods. This parameter adaptability allows a single device to perform both calibration functions effectively.
Data Source
AI summary
The present disclosure discloses a digital-analog integrated voltage transformer calibration system, used for calibrating a voltage transformer, the system including: a direct-current high voltage generator, having an input terminal connected with an input terminal of a signal conversion module; the signal conversion module, having an input terminal connected with an output terminal of the voltage transformer and an output terminal connected with a digital quantity acquisition module; the digital quantity acquisition module, having an input terminal connected with the output terminal of the voltage transformer and an output terminal connected with a processing module; the processing module, used for receiving a first digital voltage signal, a second digital voltage signal, and a third digital voltage signal.