For more than 100 years, there has been a dispute over the superiority and inferiority of the two power supply systems, AC current and DC power supply. There is no doubt that in the first round of market competition, because the working voltage elevator conversion is very easy, AC current has an advantage, as everyone knows, the industry's expectations for DC power supply and distribution systems have never been less, and with the technical development trend of power electronics technology and the emergence of semiconductor material output power components, AC voltage conversion is not difficult, so the application has gradually increased.
"Looking at the market prospects of DC power supply systems, we have recently taken the initiative to promote the definition of DC power supply systems, and we look forward to calling on a large number of upstream, midstream and downstream practitioners in the whole industry chain to invest capital and create a new sales market together." Jian Penghui, associate director of product research and development of Mean well Group, said.
In 2017, ABB was awarded a contract for the UHVDC project from Zhundong in Xinjiang Province to Anhui in Anhui Province to build a 1.1MV high-voltage direct current system software ± 12GW of transmission and distribution capacity, with a transmission and distribution distance of more than 3,000 kilometers, which is much farther than the traditional 500,000 volt AC current that can only transmit 600 kilometers.
In addition, there are many examples of DC power system software used in business services and household applications, including material management centers, plant factories, and various agriculture, forestry, fishery, farming, animal husbandry and household lighting fixtures.
In addition to the advantages mentioned in the long transmission distance, there are many features of the DC power supply system. First of all, the DC power supply system can reduce the damage caused by the conversion of power engineering, so as to achieve the purpose of saving electricity. In terms of United Kingdom's public transmission and distribution system software, about 5% of the power project is consumed in the whole transmission process, and the damage reaches more than 20 billion US dollars; Comparatively speaking, the power engineering loss of the DC public power supply and distribution system can be reduced by about 30%.
Secondly, the application of DC system software can reduce the cost of multi-level power engineering conversion switching power supply, and the centralized power supply system method of DC system software can reduce the overall setting cost of system software. In addition to this, the reliability of the power engineering output is also a major advantage of the DC system software, which is critical for the materials management center. The selection of communication and AC power supply and distribution system, the power project needs to go through the AC and DC power supply conversion layer by layer, which is very complex, and the selection of DC power supply and distribution system, most of which is DC power supply "straight to the point", the structure and procedure flow are much simpler, and the power supply system of the material management center can be improved by at least 10%.
It is worth mentioning that the characteristics of storing electromagnetic energy have also become a major factor in the development trend of renewable resources in the development trend of direct current system software.
"The high efficiency of the lighting system software of the DC power supply system can be increased by 10%, and the configuration cost can be reduced by about 30%. In addition, private spaces such as farms and pastures and plant factories are also particularly suitable for the use of lighting system software for DC power supply systems.
In terms of the progress of the DC power supply system sales market, the progress of the formulation of standards and specifications is another important one, Kan further stated that "in the past, the relevant policies and regulations were mostly formulated for the communication of power supply and distribution systems, and did not fully consider the differences and regulations of DC power supply systems, so it is sometimes not appropriate to extend the use and endanger brand promotion." In recent years, some relevant policies and regulations on engineering construction and lighting fixtures have begun to change the DC power supply system.
For the requirements of the DC power supply system, MEAN WELL at this stage focuses on the plan of front-end development of high-power resistor products and back-end development of DC conversion system software to improve work efficiency and cost-effectiveness.
"The structure of the whole industry chain of the DC power supply and distribution system is different, and the components selected for the software of the two systems are different, so it is not enough for MEAN WELL to release DC regulated power supply products and plans, and a large number of practitioners must add them together to promote the completion of the use of DC." MEAN WELL invites everyone to invest in the realization of the application of DC power supply system, and ushers in new sales markets and business opportunities for each other.
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