UPS embarked on the "green, low-carbon" innovation road

With the development of science and technology economy, energy and environmental issues have become increasingly prominent, which requires the UPS industry to develop to “green, low-carbon”. However, true green “low-carbon” UPS power supplies are characterized by low harmonic currents on the power grid. Harmonic pollution is small, the efficiency of UPS operation is high, and loss is reduced.

Low-carbon development (or low-carbon economy) has gradually become a global trend and is widely considered as the only road for the future development of humankind in the global context. After the "Copenhagen Conference," the Chinese government has successively introduced a series of "low-carbon" environmental protection policies and measures. In 2010, it was dubbed the "China's low-carbon first year." With the changes in policy and consumption environment, "green UPS" and "green UPS technology" have become the strategic highlands for leading UPS markets. Lead-free production, DSP technology, IGBT rectifier technology, and APFC technology have all achieved significant development. And use.

The ideal UPS should be purely resistive to the grid, that is, the power factor of the UPS is preferably 1, so that it does not have any pollution on the grid. However, the reality is that most UPSs commonly use 50 Hz. Low-frequency thyristor rectifiers generate a large amount of harmonic feedback pollution to the utility power. The problem facing all users is the control of harmonic pollution, just as we control chemical plants to discharge sewage. Harmonic waves cause great harm.

Many people only pay attention to the comparison of UPS prices when purchasing UPS. They do not know how to measure the operating cost of UPS. For example, an HP9330C series 80KVA (64KW) UPS has a 95% overall efficiency, while a 12-pulse rectifier has an efficiency of only about 88%. In the 10-year UPS life cycle, the HP9330C series UPS The electricity savings are 64 (KW) x (95%-88%) x 24 (hours) x 365 (days) x 10 (years) x 1 (yuan/kilogram) = 392,448 yuan. Power consumption will be calories The form was distributed, so that the user also had to pay a large amount of electricity for the user to air-condition and refrigerate, while UPS unconsciously saved the user nearly 40,000 yuan in electricity.

Conclusion: In recent years, energy and environmental protection issues have attracted people's attention, and energy and the environment have also become popular topics. UPS reduces the generation of harmonic pollution and increases the efficiency of machine machinery. It not only contributes to environmental protection and energy conservation, but also contributes It saves users a lot of electricity charges and improves economic efficiency. This further explains that UPS's “green, low-carbon” is what the times demanded.

Bi Directions Thyristor (Triac) is equivalent to the antiparallel connection of two unidirectional thyristors, but only one control pole.
Bidirectional thyristors are made of N-P-N-P-N five-layer semiconductor materials, and three electrodes are also derived from the outside. Its structure is shown in the figure. Bi-directional thyristor volt-ampere characteristic curve Since the forward and reverse characteristics of the bidirectional thyristor are symmetrical, it can be turned on in any direction and is an ideal AC switching device.

Bi Directions Thyristor (Triac)

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