In recent years, oil filling equipment with voltage levels of 330KV and above has become increasingly popular in China, and the determination of gas content in insulating oil has become increasingly important. At present, the carbon dioxide elution method developed according to the DL/T450-1991 method is only applicable to the determination of oil products without acidic gases, while the vacuum pressure difference method developed according to the DL/T423-91 method has certain limitations due to the difficulty in popularizing vacuum instruments. With the development of oil quality supervision technology and the improvement of gas chromatography technology in China, using gas chromatography to determine gas content has become a necessary means.
GC-9560-HD Transformer OilGas content chromatography analysis systemThe process design fully complies with the provisions of the chromatographic process design in the power industry standard DL/T 703-1999 "Gas Chromatography Determination of Gas Content in Insulating Oil" of the People's Republic of China. The system is equipped with highly sensitive thermal conductivity detectors and hydrogen flame ionization detectors, as well as a nickel catalyst converter, which can achieve the determination of all nine gas components dissolved in transformer oil: hydrogen, oxygen, nitrogen, methane, ethylene, ethane, acetylene, carbon monoxide, and carbon dioxide.
Execution standards:
DL/T 703-1999 "Gas Chromatography Method for Determination of Gas Content in Insulating Oil"
Chromatographic flowchart:

GC-9560-HDGas Content Chromatography Analysis SystemPerformance indicators:
（1）Zui small detection measurement: When the injection volume is 1mL, the Zui small detection concentration in the oil is measured:（uL/L）

（2）Qualitative repeatability: Deviation ≤ 1%
（3）Quantitative repeatability: Deviation ≤ 3%
GC-9560-HDGas Content Chromatography Analysis SystemSystem configuration:
1. GC-9560 gas chromatograph 2, gas content dedicated chromatography workstation
3. Oscillatory degassing device 4, hydrogen generator
5. Low noise air pump 6, standard gas
7. High purity argon gas source
2、 Transformer oil gas content dedicated chromatography workstation
Y-200 4.0The specialized chromatography workstation for power systems is a generation of chromatography workstations developed based on the Windows XP system. It is a professionally designed practical data processing system with powerful functions. Its fault diagnosis complies with national standards, and data acquisition uses a 24 bit high-precision USB interface data acquisition card with an input range of -2v~2v and a resolution of 1 μ V. The main performance is as follows:
1. Reverse control function:
The Y-200 4.0 version workstation is the first true workstation in China that integrates data acquisition, data management, and chromatography control functions. Its concise and clear control interface makes chromatography operations so simple! (1) All temperature parameters can be set and displayed in real-time through the workstation. (2) The temperature rise and fall of the chromatograph can be started by clicking the mouse. (3) The ignition of FID and the operation of TCD bridge flow can be completed through the workstation. (4) The detector parameters such as range and polarity can be set through the workstation

2、 Hardware performance:

1. High precision: USB interface, 24 bit high-precision A/D data acquisition card, resolution ± 1UV

2. Input channel level range: external data acquisition box, 2 input channels. -1V to 1V (expandable ± 2V)

3. Integral sensitivity: 1 μ v · sec (i.e. single digit of area)

4. Dynamic range: 10⁶(1 μ v is the smallest unit)

5. Linearity:<± 0.1%

6. Reproducibility: 0.06%

3、 Software performance:

1. Easy to operate: Chinese WIN9X and XP operating platforms, fully Chinese window interface, real-time operation prompts and online help, convenient for users to learn and use.

2. Open data management: Save complete device information and analysis result data information. Easy to add, modify, delete, and retrieve at will. The retrieved analysis result data can be output to a Word template for printing, making it convenient for users to create various summary reports. Open data format, suitable for multi-user data sharing, facilitating access by other database management software and meeting the retrieval needs of management departments.

3. Flexible peak recognition and processing capabilities: Chromatographic peaks can be identified, deleted, and baseline cut adjusted by setting parameters and time programs or manually modifying methods. Ensure the accuracy of the analysis results.

4. Device management function: Briefly and intuitively set up user device management cards, and save analysis results according to different device classifications, making data management clear at a glance!

5. Flexible printing function: Provides result reports in both fixed format and custom template formats.

6. Automatic fault diagnosis: automatic over limit prompt after analysis, providing three ratio diagnosis that meets national standards, TD diagram, component concentration diagram, David triangle and other multiple fault diagnosis methods.
7. Easy qualitative analysis: The peak identification table can be automatically or manually edited. Automatically calculate correction factors and perform multiple average corrections.
8. Data visualization: Based on the historical records already stored, visually display the concentration trend chart of each component in the historical data of a certain device.