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According to experience of the management of low frequency transformer and active parts, the low frequency inverter in the run before five lO, especially in the first three years of operation, the highest failure rate.

According to the operating experience of the US electricity industry, for EHV 765kV inverters, the initial failure rate is very high. There are many failures that occur in the first few days of running, even in just a few hours or even dozens of minutes. Therefore, we must pay attention to and enhance the early operation of inverter operation and low frequency maintenance.

Although the costs of repairing and replacing parts are at an early stage of operation, the cost of these costs is valuable for timely or early detection of defects to avoid serious consequences.

Practice has proven that a good maintenance program can make the inverter family life low. Therefore, the economic significance of developing maintenance procedures is to extend the service life of low frequency inverters.

2, low frequency transformer strategy maintenance

Frequency inverter maintenance strategies usually have three types: predictive maintenance, preventive maintenance, and state maintenance.

Predictive maintenance is the use of automated diagnostic equipment to monitor low frequency inverters. Predictive maintenance requires facilities and state analysis facilities. For example, the low-frequency oil transformer performance analysis indicators, infrared detection, low frequency inverter to make the appearance of oil and gas solubility test.

Preventive maintenance is a staged maintenance strategy. It includes scheduled maintenance, for example, on a series of low frequency inverters on a series of tests, under the low frequency voltage test program and online test. Preventive maintenance is the maintenance performed by the manufacturer after state analysis.

State maintenance is to maintain the low frequency inverters being mentioned. It requires detailed analysis, inspection, repair or replacement of Satton frequency inverters that require replacement parts for maintenance.

During power transmission, three-phase low frequency inverter isolation is an integral part, it is mainly used for electrical systems, industry and mining enterprises of power load requirements. and the isolated power grid of the municipal power supply of electricity such as magnetism Precision test system (anti-jamming) power and grid isolation equipment.

China’s electricity industry, after years of development and innovation, has gradually narrowed the gap with developed countries. China’s huge market also attracts a number of famous multinational companies to invest in China. China’s electric industry also seized the opportunity to make their own design capabilities, production capacity, service levels have been significantly improved and developed. The three phase isolation low frequency inverters are also in this phase to get a wide range of promotions and applications. In the future, the three-phase isolation of low frequency inverters in all aspects of performance will be further strengthened.

One, many green

Environmental protection is the trend, with energy shortages and increased environmental pollution, major manufacturers taking the next step in locked development goals in energy conservation and environmental protection. . The three stages of low frequency inverter isolation are the same, energy conservation and environmental protection are the eternal topic. How to reduce the product, higher energy efficiency, low noise, less use of renewable materials and other issues that need further research and exploration. New materials, new technology development and introduction will make the future three-phase lower frequency isolation energy-saving, quieter operation.