Transformer Bushing Partial Discharge Monitoring With Local SIP Digitization
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Solution Overview
Problem
Existing transformer bushing partial discharge monitoring devices are large in size, have long wiring, and are susceptible to electromagnetic interference, resulting in low accuracy of transformer bushing monitoring.
Innovation Solution
A transformer bushing partial discharge monitoring chip device comprising an acquisition unit with sensor modules installed at transformer bushing end screens, a system in package (SIP) digitization unit with a wireless communication unit and SIP chip, and a background processing terminal, which reduces signal transmission distance and minimizes electromagnetic interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sensors are installed at the bushing end screen to acquire partial discharge signals, then the monitoring capability is improved, but the signal transmission distance increases and electromagnetic interference worsens
Solution Approach 1:
The patent introduces a signal processing unit as an intermediary component installed within the control cabinet, close to the bushing end screen sensors. This intermediary unit processes the weak partial discharge signals locally before transmission, acting as a mediator between the sensors and the monitoring system to reduce the impact of electromagnetic interference during signal transmission.
Solution Approach 2:
The patent replaces the traditional long-distance cable transmission mechanical system with a wireless communication system for transmitting processed signals from the control cabinet to the monitoring terminal. This substitution eliminates the electromagnetic interference issues associated with long cable runs while maintaining signal transmission capability.
2Productivity
If high-performance acquisition and processing units are used to process partial discharge signals, then the signal processing capability is improved, but the device size and complexity increase
Solution Approach 1:
The patent segments the signal processing functionality into modular components: sensor modules at each bushing end screen, a centralized signal processing unit in the control cabinet, and a separate monitoring terminal. This segmentation allows high-performance processing where needed while keeping individual components manageable in size and complexity.
Solution Approach 2:
The patent transitions from a single-plane board device architecture to a three-dimensional distributed architecture with components placed at different locations (bushing end screens, control cabinet, and monitoring terminal). This dimensional change allows high-performance processing capabilities to be achieved without concentrating all complexity in one location, thereby reducing local device complexity.
Data Source
AI summary
A transformer bushing partial discharge monitoring chip device and method are provided. An acquisition unit comprises three sensor modules installed at end screens of three-phase bushings of a transformer respectively for acquiring partial discharge signals and power frequency current signals from the transformer bushing end screens; each of the sensor modules is connected to an SIP digitization unit through a wire; the SIP digitization unit is fixedly installed beneath a base of the acquisition unit for digitizing the partial discharge signals and the power frequency current signals; an output end of the SIP digitization unit is connected to an input end of a background processing terminal.