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Chemical industry, new energy industry

Date:3/10/2015 03:35:30 PM

Application background:

1), the industry's load type is mainly power electronic rectifier power supply and frequency control device will produce 5 times, 7 times, 9 times, 11 times, 13 times and other harmonics, with 12 pulse and 24 pulse rectifier Of the popularity of low-order harmonics gradually reduced, 23 times, 25 times the harmonic current gradually increased;

2), the work of the equipment for the dynamic impact of the type of operation, single stand-alone capacity, active power and reactive power amplitude, frequency changes are larger, and has a certain periodicity.

3), causing the system voltage fluctuations and flicker, low power factor, three-phase current imbalance, increased line loss, harmonic content exceeded

Recommended solution:

(DVG) and active power filter (APF) are installed on the low side bus (usually 0.4kV) to increase the power factor, solve the reactive power fluctuation and avoid the overturning phenomenon, and filter out the high Subharmonic.

Active filter design capacity = operating current * current distortion rate

Note: In order to make the compensation better, generally leave margin, so the calculated capacity in the maximum load rate of the effective harmonic current multiplied by 1.2 as the final configuration capacity.

Customer benefits:

Power quality in line with national standards, to avoid the power company fine

Improve the power quality, so that the power supply system is safe and reliable operation

Effective control of harmonics, to avoid interference with sensitive equipment

Reduce equipment loss, reduce equipment maintenance costs, extend the service life

TypeInfo: Chemical, new energy

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