I. Overview of HKC-GP9570 Transformer Oil Photoacoustic Spectroscopy Online Monitoring System
The HKC-GP9570 transformer oil photoacoustic spectroscopy online monitoring system is used for online analysis and fault diagnosis of dissolved gases in power transformer oil, suitable for power transformers, arc furnace transformers, reactors, and instrument transformers at 110kV and above voltage levels, as well as other oil-immersed high-voltage equipment. The HKC-GP9570 system can quantitatively, automatically, and rapidly monitor online the content and growth rate of dissolved fault gases in the oil of transformers and other oil-immersed power high-voltage equipment, and through the fault diagnosis expert system, it can early predict equipment fault hidden dangers, avoid equipment accidents, reduce significant losses, and improve the reliability of equipment operation. As an authoritative product in the field of oil photoacoustic spectroscopy online monitoring, this system provides a stable and reliable solution for online remote DGA analysis of power transformers, and is a strong guarantee for the implementation of the condition-based maintenance system in the power system.
II. Composition of HKC-GP9570 Transformer Oil Photoacoustic Spectroscopy Online Monitoring System
The HKC-GP9570 transformer oil photoacoustic spectroscopy online monitoring system consists of a field monitoring unit (photoacoustic spectroscopy data collector), a master station unit (data processing server), and monitoring software. The field monitoring unit, i.e., the photoacoustic spectroscopy data collector, is composed of an oil sample collection unit, an oil-gas separation unit, a gas detection unit, a data acquisition unit, a field control processing unit, a communication control unit, and auxiliary units. The auxiliary units include transformer interface flanges, oil pipes, and communication cables.
III. Working Principle of HKC-GP9570 Transformer Oil Photoacoustic Spectroscopy Online Monitoring System
When the HKC-GP9570 transformer oil photoacoustic spectroscopy online monitoring system is working, it uses a vacuum differential pressure method to draw transformer oil into the oil sample collection unit, and circulates the oil sample through an oil pump; the oil-gas separation unit quickly separates dissolved gases in the oil into the gas chamber, and the built-in micro gas sampling pump transports the separated gas sample to the photoacoustic spectroscopy gas chamber; the data acquisition unit completes AD data conversion and acquisition, and the embedded processing unit stores, calculates, and analyzes the collected data, and uploads the data to the data processing server (installed in the main control room) via RS485 to Ethernet, and finally the HKC-GP9570 condition monitoring software performs data processing and fault analysis.
IV. Main Technical Parameters of HKC-GP9570 Transformer Oil Photoacoustic Spectroscopy Online Monitoring System
1. Working environment temperature: -40℃～＋55℃
2. Working environment humidity: relative humidity 5～95% (no condensation inside the device, and no icing)
3. Atmospheric pressure: 70kPa～110kPa; 50kPa～110kPa
4. Working power supply: AC220V±10%, 50Hz
5. Monitoring components: H2, CO, CO2, CH4, C2H2, C2H4, C2H6, H2O, O2, N2 and other gas components and total hydrocarbon content;
6. Minimum monitoring cycle: 20 minutes, and above 20 minutes can be set by the user
7. Sampling method: Circulating sampling, safely and truly reflecting the actual gas conditions in the transformer
8. Oil-gas separation method: Negative pressure dynamic headspace purge and degassing method
9. Data storage life: ≥10 years
10. Monitoring gas Measurement range (ppm) Minimum detection limit
1) H2 1～5000.0 1ppm NA
2) CO 1～50,000.0 11
3) CO2 2～50,000.0 2
4) CH4 0.1～50,000.0 0.1
