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How can pharmaceutical companies prevent frequency converters in fermentation workshops from interfering with the power grid?
Time：
2019-01-05
The main harmonic source under the 10kV main transformer of a certain pharmaceutical factory is the fermentation workshop. This workshop has 4 transformers (2000kVA, 10/0.4kV), with every two connected in parallel as a group, divided into two groups for independent operation. One group (on the east side) is connected to 6 variable frequency drives (VFDs) with motor capacities of 280KW each, while the other group (on the west side) is connected to 7 VFDs with motor capacities of 200KW each. The VFDs generate significant non-sinusoidal distorted currents during operation, causing serious interference to the power grid. To purify the power grid, improve the system power factor, and eliminate harmonics.
With the development of modern industry, the supply of high-quality electric power has become increasingly important. However, in certain cases, the quality of the power grid is severely disturbed by non-sinusoidal distorted currents, affecting the performance of the power grid and the lifespan of equipment. The main harmonic source of a certain pharmaceutical factory's 10kV main transformer isthe fermentation workshop.This workshop has 4 transformers (2000kVA, 10/0.4kV), with every two connected in parallel as a group, divided into two groups for independent operation. One group (east side) has 6 frequency converters (with motor capacity of 280KW each), and the other group (west side) has 7 frequency converters (with motor capacity of 200KW each). The frequency converters generate significant non-sinusoidal distorted currents during operation, causing serious interference to the power grid.To purify the power grid, improve the system power factor, and eliminate the harm of harmonics, it is necessary to implement harmonic treatment in the 0.4kV system to ensure that all harmonic indicators meet national standards.
In this plan, 4 transformers are used in parallel, divided into east and west groups. These transformers attenuate the harmonics generated by the frequency converters and limit these harmonics within the national standard range. Through this method, the quality of the power grid has been significantly improved, and the lifespan of the equipment has also been ensured.
In addition, harmonic treatment can also improve the system power factor, making the power grid more stable. This is very important, as the effective utilization of electric power is one of the core requirements of modern industry. According to data, a certain pharmaceutical factory's adoption of harmonic treatment technology can improve the energy efficiency of the power grid, reduce energy waste, and achieve sustainable development.
Overall, the adoption of harmonic treatment technology by a certain pharmaceutical factory is a very wise decision. This technology can improve the quality and efficiency of the power grid, ensure that equipment remains in good condition, and promote the sustainable development of the enterprise.
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