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With the further development of technical research, domestic high-voltage inverter can be compared with imported inverter in theory and function, but limited by technology, the gap with imported products is still obvious.
In the 1990 s, with the rapid development of economy in our country, the inverter in the rapid expansion in the industrial field, in the 21st century to the influence of economic crisis, but does not disturb the inverter market, as a whole remained stable state of development, with the inverter market demand growing at the same time also increased the transformer production scale expansion.
At present, there are no less than 200 low-voltage inverter manufacturers in China, most of which are LOW-voltage products of AC 380V, and domestic high-voltage inverter. With the further development of technical research, domestic high-voltage inverter can be compared with imported inverter in theory and function, but limited by technology, the gap with imported products is still obvious. These conditions are mainly reflected in the following aspects:
The technical standards of domestic high-voltage frequency converters are yet to be standardized.
High voltage inverter matching industry is very underdeveloped.
The production process is general, can meet the technical requirements of inverter products, the price is relatively low.
Key power semiconductor devices used in frequency converters are completely dependent on imports, and will be dependent on imports for a long time.
Frequency converters with instantaneous power failure and recovery and fault recovery functions have been developed.
Some manufacturers have developed four-quadrant high-voltage frequency converters.
The power of domestic high voltage inverter is getting bigger and bigger. At present, the largest application in China is 20000KW.