Reasonable application of frequency conversion speed regulation technology
First, the role of the reactive power compensation principle: the purpose of the reactive power compensation device is to improve the power supply efficiency, improve the power supply environment, and fully utilize the principle of energy exchange between the two loads to supply power. The loss between the transformer and the conveyor line is compensated. In the power supply system, the reactive power compensation device is an unobtainable component; only when the compensation device is properly selected and applied to the power system can the power factor of the grid be Effective improvement, the network loss is minimized, and the quality of the power grid is effectively improved.
When selecting the reactive power compensation device, it is usually applied to the capacitors and reactors that are switched by the group. In some special cases, the camera and the static reactive power compensation device are also good choices; the requirements of reactive power balance are met. In order to achieve the requirements of the voltage quality standard, it is also necessary to apply the pressure regulating device. It is necessary to apply the principle of hierarchical partitioning and local balance to the reactive power compensation of the power grid. At the same time, it is necessary to fully consider the reactive power adjustment capability of the substation, and promote voltage optimization and power factor. Active application of advanced technologies, such as grid reactive power management system software, etc., will lead to better improvement of grid quality and promote safer and more reliable operation of the grid.
The second is the inverter load standard: compared to the heating time of the transformer and the motor, the heating time of the semiconductor device tends to be small, usually used in the calculation time is minute, if there is overload over temperature problem, it will bring a lot of The problem. Therefore, it is necessary to strictly specify the load conditions. It is necessary to divide the operation type of the converter. The rated output of the first stage is the full output of the current, and the overload condition does not occur; the second stage is that the basic load current can be continuously output, and the short-time overload operation can reach 50%; The third to sixth overload takes longer. Currently in the market, generally only the second level and the first level are sold. In addition, it is necessary to combine the production mechanical load performance and speed range to make a reasonable choice of the inverter.
