Only the state overhaul based on the intelligent online monitoring of transformers has real practical significance. It not only avoids the blindness and coercion brought about by preventive testing and regular maintenance, but also saves a lot of manpower, material and financial resources, and enhances the power supply reliability of the power transmission and transformation equipment and prolongs the service life of the transformer. Broad development prospects.

As the grid companies accelerate the construction of a strong smart grid, the improvement of the level of smart transformer technology will have a huge impetus to the construction of smart grids. The transformer online monitoring function and the real-time feedback interaction function will insert the intelligent development wings for the traditional transformer.

High-speed development of global transformer monitoring system

According to Technavio's global transformer monitoring system market research report, the global transformer monitoring system market has a compound annual growth rate of 36% from 2016 to 2020. As far as the Asia-Pacific region is concerned, the rapid economic development and rapid population growth will inevitably drive the market's demand for transformers to increase power distribution. These large transformer networks require continuous monitoring to prevent failures in the transmission and distribution process leading to power outages. Therefore, in the next five years, the transformer monitoring market in the Asia Pacific region has great potential.

Moreover, the demand for electricity for industrial, commercial and residential users continues to grow, stimulating power companies to accelerate the expansion and expansion of power grids, and the installation of distribution transformers has become a top priority, as it not only expands the distribution range but also The upgrading of aging transformers will further promote the market's demand for monitoring.

It can be seen that in the next few years, stable and affordable power supply is the key to economic growth, both in developed and developing countries. Transformers, as key high-cost equipment in transmission and distribution systems, will play an important role in this, so their operations require continuous real-time monitoring to ensure stable and reliable power delivery.

Advantages of online monitoring of transformers

With the development of modern sensing technology, microelectronics technology and computer technology, the state monitoring of high voltage equipment such as transformers has a solid foundation. Compared with traditional transformers, intelligent transformers have intelligent online monitoring functions and are increasingly becoming important equipment for smart grid construction.

On-line monitoring of transformers is based on micro-processing technology. It integrates sensors, data collection, communication systems and data analysis functions. By continuously monitoring the state parameters over a period of time, it captures the precursor information of the early faults of the transformer in time, according to the parameters of the transformer. The trend is changing to determine the operating state of the transformer. Compared with traditional transformers, intelligent online monitoring has the following advantages:

Effectively prevent the occurrence and development of various transformer faults, and reduce the economic losses caused by unexpected power outages. Real-time monitoring of the running transformers makes up for the deficiencies of conventional testing and testing methods. Although there are some limitations to the internal sudden fault prediction based on the captured transformer dynamic information, it is still the most effective technical basis for the development of the transformer maintenance plan, and has very important guiding significance.

High reliability, maintenance-free and self-testing capabilities. Once the monitor itself has a problem, an audible and visual call alarm signal can be automatically issued. Therefore, it eliminates the misjudgment caused by the abnormality of the detecting device in the conventional detecting method.

The economic benefits are considerable. The investment cost of the transformer online monitoring system mainly includes two parts: sensor and intelligent monitoring software. According to the statistics of relevant departments at home and abroad, the cost of a complete online monitoring system for transformers is generally about 1% of the price of transformers. However, due to the early and accurate detection of the transformer's early failure, its operation and maintenance costs are reduced by 75%, the annual cost savings is equivalent to 2% of the transformer price, and the service life can be extended for about 10 years, and its economic benefits are considerable.

Development trend of transformer online monitoring

As far as the application of transformer online monitoring technology is concerned, although there are still defects such as weak anti-electromagnetic interference capability, short service life and high price, due to its unparalleled superiority with conventional detection methods, all problems are It will be gradually solved in development.

From a policy perspective, due to the demand for smart grid construction, and the increasing research and development efforts of research institutes and online monitoring companies, the application of online monitoring technology is steadily advancing, not only to promote transformer maintenance procedures and management methods. The change will inevitably lead to the establishment of a standardized state maintenance management system and the final unification of technical standards.

On the economic level, with the strengthening of domestic online monitoring equipment production and software development vendors' research and development, the competition of similar foreign products, and the strong demand for power grids, not only the price of their hardware and software products will drop significantly, but also the price/performance ratio. It will also be greatly improved.

From a technical perspective, hardware devices will move toward more intelligent, and maintenance-free will be higher. The use of intelligent sensors enables electromagnetic interference to be effectively suppressed; with the widespread adoption of new materials, the service life of devices such as gas permeable membranes for chromatographic analysis will also be extended. The fault analysis software system will also integrate with offline test, equipment status, operational data and other information to carry out integrated online diagnosis. Online monitoring data of different systems will be shared through the network.

As the grid companies accelerate the construction of a strong smart grid, the improvement of the level of smart transformer technology will have a huge impetus to the construction of smart grids. The online monitoring function of the transformer and the real-time feedback interaction function will insert the intelligent development wings for the traditional transformer.