Will UPS power supply affect the grid environment?

Kehua UPS is an important part of power supply system and the load of power grid. Therefore, like other loads, its input power factor is also an important performance index to measure whether the grid is polluted. When the input power factor is low, it can not only absorb the active power, but also the reactive power. The result is to improve the configuration capacity of the system, affect the power supply quality of the system, reduce the working efficiency of UPS, and increase the operating cost of ups. If the ups with input power factor of 0.8 and input power of 100 KVA is configured, when the ups output is full load, the ups shall absorb 80 kW of active power from the grid and 60 kvar (waste) of reactive power, and the system capacity shall be 150 kVA. If the diesel generator is used for power supply, the capacity and cost of the power distribution equipment (switches, transformers, transmission, etc.). It will increase greatly.

The input power factor of ups with different circuit structure is also different. The input power factor of backup ups and Online Interactive UPS is equal to the power factor of output load of Kehua ups. When the power supply is normal, its voltage regulating link does not have the function of power factor regulation, but it will not add power factor distortion to the power grid itself. The traditional AC / DC converter is a controllable rectifier and filter circuit at the input of double conversion ups. Due to the influence of high-order harmonics, its input power factor is very low, only about 0.8, which has nothing to do with the nature of UPS output load. At the input, the traditional double conversion ups with high frequency rectifier is adopted, and the delta conversion technology of series conversion to ideal sine wave current source is adopted. In fact, it is equivalent to a typical power factor correction circuit), which is composed of high frequency conversion series parallel compensation circuit, has a high input power factor, can reach 0.99 in a wide range of input voltage and load, and is independent similar to the u.ps output load.