ship and automobile manufacturing
automobile production workshop (stamping workshop, welding workshop, assembly workshop, etc. )extensive use of electric welding machines, laser welding machines and large-capacity inductive loads (mainly electric motors )and other nonlinear loads, resulting in serious harmonic currents in all transformer load currents in the workshop, mainly the 3rd, 5th, 7th, 9th and 11th harmonic currents, 400 V the total voltage distortion rate of the low-voltage bus reaches more than 5%, and the total current distortion rate (THD)reached about 40%, causing 400 V the voltage total harmonic distortion rate of the low-voltage power supply and distribution system seriously exceeds the standard, causing serious harmonic power losses in electrical equipment and transformers. at the same time, all transformer load currents in the production workshop have serious reactive power requirements. the average power factor of some transformers is only about 0.6, which causes serious power loss problems and leads to a serious shortage of transformer output active capacity. harmonic interference makes the car the fieldbus automated production system cannot work properly.
an automobile manufacturing branch adopted the HYSVGC integrated dynamic reactive power compensation device and active power filtering device can effectively and quickly
tracking and compensating reactive power, the average power factor can reach 0.98, and all harmonics are filtered out to below the allowable value of national standards, which improves the utilization rate of the transformer, reduces the line heat generation of the entire distribution system, and reduces the cost of electrical components. failure rate.
scheme diagram reference
