Domestic transformer oil chromatography online monitoring technology strength and selection trends
Date: May 17, 2026 02:12:02
- Significant technological advancesDomestic oil chromatography online monitoring has made great progress in the core detector, degassing technology and diagnostic algorithms, and the performance of mainstream brands has been able to meet the engineering needs of substations at all levels.
- Service Response AdvantageLocalized R&D and production brings faster after-sales response, shorter spare parts supply cycle and more convenient technical communication, which are the unique competitiveness of domestic solutions.
- Perfect standard system: Domestic electric power industry on the oil chromatography online monitoring network testing and operation management standards are improving, for the quality of domestic equipment to improve the normative framework
- High degree of customization: Domestic suppliers have a natural flexibility advantage in adapting to the domestic grid operating environment and the individual needs of users
1. Status of technological development
1.1 Detector technology
Detector is the core component of chromatographic analysis system, which determines the sensitivity and stability of gas detection. Among common detector types, domestic products have continued to improve in core indicators such as sensitivity, baseline stability and service life, and the gap with imported solutions has been significantly narrowed.
1.2 Vacuum degassing technology
Degassing efficiency directly affects the consistency of online monitoring and offline detection data. Domestic systems generally use dynamic vacuum degassing or headspace degassing program, degassing efficiency and repeatability has reached the practical level of engineering, and can meet the basic requirements of the national standard for analysis of dissolved gases in oil.
1.3 Intelligent Diagnostic Algorithm
On the basis of the standard diagnostic model, domestic suppliers have carried out a large number of localized optimizations for the equipment characteristics and operating environment of China's power grid. Some of the systems have introduced machine learning and big data analysis technologies to improve the accuracy of fault diagnosis and early warning capability.
2. Comparative analysis with imported programs
| comparison dimension | National program | Import Program |
|---|---|---|
| Core technology maturity | Mainstream brands have matured to meet the needs of substations at all levels | Deep technology accumulation and long brand history |
| After-sales response time | Localized service network for fast response | Cross-country coordination, potentially long response times |
| Spare parts supply | Local production, sufficient spare parts and short lead time | Import customs clearance process, uncertain spare parts cycle time |
| Customization capabilities | Flexible and customizable | High degree of standardization and limited scope for customization |
| Communication Protocol Adaptation | Native support for domestic mainstream protocols | Adaptation conversion may be required |
| Software interface language | All Chinese, localized operating habits | Varying levels of Chinese language support |
3. Selection trends
3.1 From single-point monitoring to system integration
The future trend is that oil chromatography monitoring no longer operates in isolation, but as part of the integrated monitoring system of the substation, working in concert with local discharge monitoring, temperature monitoring, iron core monitoring and so on. When choosing a supplier, it is recommended to pay attention to the integration capability and data interoperability of its comprehensive monitoring platform.
3.2 From data acquisition to intelligent diagnosis
Collecting data is only the first step, being able to make accurate fault diagnosis based on data is the valuable ability. Domestic programs are investing more and more in diagnostic algorithms, and some of the head brands already have expert-level automatic diagnostic functions. When selecting a model, focus on evaluating the actual ability of the diagnostic software.
3.3 From periodic maintenance to condition maintenance
The State Grid and the Southern Power Grid continue to promote the state maintenance mode, and online monitoring of oil chromatography is an important data source for the state maintenance system. In the future, suppliers with rich diagnostic data accumulation and good platform integration capability will be more competitive.
4. Frequently Asked Questions FAQ
4.1 Q. How reliable is the domestic equipment? How long does it last?
A: Mainstream domestic oil chromatography online monitoring in the power system has a wealth of cases of operation, the stability of the operation of the actual data to support. The design service life is usually 8~12 years, and the actual operation life depends on the use environment and maintenance. It is recommended to pay attention to the warranty period and out-of-warranty service policy provided by the supplier.
4.2 Q: Is there a difference in detection accuracy between domestic and imported?
A: In their respective calibrated detection range, the detection accuracy of mainstream domestic products is in the same order of magnitude as that of imported products. The gap is more reflected in the extreme environmental adaptability and ultra-long cycle stability - this is precisely the need for long-term operational data accumulation to verify. It is recommended to pay attention to the actual operation cases in the same scene.
4.3 Q: Are domestic supplies a good buy?
A: The consumables (carrier gas, chromatographic columns, etc.) of the domestic equipment are of common specifications or produced independently, with sufficient supply and short procurement cycle. Compared with the imported equipment which needs to wait for customs clearance and cross-country transportation, the domestic solution has obvious advantages in the guarantee of consumables supply.
4.4 Q: What is the status of implementation of national standards for online monitoring of oil chromatography?
A: There are a series of standards such as GB/T 7252 (Guidelines for Judgment of Dissolved Gas Analysis in Oil) that regulate the methods and criteria of oil chromatography, and the industry standards and group standards related to on-line monitoring are also in the process of continuous improvement. The network testing usually requires the provision of a nationally recognized third-party type test report.
4.5 Q. What is the most important thing when choosing a supplier?
A: In a comprehensive view, the most important are three aspects: the core technology and operational reliability of the product, the supplier's after-sales service capability and response speed, and the accumulation of actual engineering cases in the scenario. One of the three dimensions is indispensable, and should not only look at a single indicator.
5. Summary of trends
5.1 Technical capabilities continue to improve, and domestic solutions are moving from usable to usable.
5.2 Service responsiveness and customization flexibility are differentiators for homegrown solutions.
5.3 Suppliers are selected with a view to a long-term relationship, not just a one-time purchase of equipment.
Disclaimer: The content of this article is for technical exchanges and reference only, and does not constitute any form of procurement commitment or contract offer. Product technical parameters, configuration programs and prices are subject to the actual signed contracts and technical agreements. The technical data and cases involved in this article are from public information and engineering practice, if updated without notice.
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