SOROTEC UPS

1.Appearance and surface quality Because the cold plate is obtained after the cold rolling process, and cold rolling also carries out some surface finishing, the surface quality of the cold plate (such as surface roughness) is better than that of the hot plate. Therefore, if there is a higher requirement for the coating quality such as post-sequence painting, cold plate is generally chosen. In addition, hot plate is divided into pickling plate and non-pickling plate. The surface of pickling plate becomes normal metal color because of pickling, but the surface is still not as high as cold plate because of non-cold rolling. The surface of non-pickling plate usually has oxide layer, blackening, or iron oxide black layer. Popularly speaking, it’s like it’s burned, and it’s usually rusty if the storage environment is not good. 2.Performance Generally, the mechanical properties of hot plate and cold plate are considered to be indistinguishable in engineering. Although there is some ...

1.Compensation mode Domestic reactive power compensation devices basically use capacitors for reactive power compensation, the power factor after compensation is generally around 0.8-0.9. Static var generator uses power module to compensate reactive power. The power factor after compensation is generally over 0.98, which is the most advanced power technology in the world. 2.Compensation time It takes 200 milliseconds for domestic reactive power compensation devices to complete one compensation. Static var generator can complete one compensation in 5-20 milliseconds. Reactive power compensation needs to be completed instantaneously. 3.Stepped and Stepless Domestic reactive power compensation devices basically adopt 3-10 levels of stepped compensation, each increase or decrease level is tens of thousands of methods, can not achieve accurate compensation. Static var generator can start stepless compensation from 0.1 kF and realize precise compensation completely. 4. Ha...

Active harmonic filter uses current transformer to collect current on DC line. After sampling, the obtained current signal is processed by harmonic separation algorithm, and the harmonic reference signal is obtained as a modulation signal. Compared with triangular wave, the switching signal is obtained. The switching signal is used to control the single-phase bridge. According to the principle of technology, the switching signal of the upper and lower arms is connected back, and the harmonic current equal to the harmonic signal on the line and opposite to the harmonic signal on the line can be obtained, and the harmonic current on the line can be cancelled out. This is the feedforward control part. Then the harmonic component of the line current after the access point of the active harmonic filter is fed back as the input of the regulator to adjust the error of the feedforward control. Generally speaking, it is based on the principle of capacitance with high frequency resistance ...