Supply DEFC passive filter device

Working principle rr The passive filter device uses capacitors and reactors connected in series to connect to the power grid. The cabinet structure is controlled by a controller with high and low voltage switching switches (high voltage vacuum contactor, special switching contactor for low voltage capacitors) to switch on the filter capacitor bank. Cut, the frame structure adopts fixed compensation method and sets corresponding protection parameters. Set corresponding tuned low-impedance filter channels for harmonic equipment of different frequencies to shunt the harmonics existing in the power supply system so that the harmonics flow into the filter channel. Since the filtering effect is affected by the system impedance and filter capacitor bank parameters, reliable and accurate parameters and complex calculations and verifications are a reliable guarantee for the effective operation of the passive dynamic filter device. Technical Featuresrr
The harmonic controller can display harmonic content, power factor and other data in real time to facilitate observation of the filtering effect.
Specially designed and manufactured for user systems, it eliminates characteristic harmonics such as sub-sub, sub-sub, sub-sub, etc., and the filtering effect is obvious.
It can both control harmonics and compensate for reactive power. After treatment, the harmonic current reaches the national standard requirements. Depending on the load, the average power saving can be about %%.
After the filter device is put into use, the power quality can be significantly improved, which can improve the current impact caused by impact loads, reduce voltage fluctuations and suppress voltage flicker, improve voltage stability, and improve voltage quality.
It can be increased to above, which can reduce user line losses and improve the utilization rate of distribution transformers, with obvious economic benefits.
Complete device protection measures, over-current, over-voltage and low voltage functions ensure safe operation of the equipment.
Effectively prevent harmonic amplification and avoid resonance with the system.
Each high-voltage branch is composed of a vacuum switch, filter capacitor, filter reactor, discharge coil, current transformer, arrester, etc.
High-voltage complete capacitor protection function: capacitor safety discharge device, after power outage, the residual voltage of the capacitor will be reduced to below within the specified time. Single capacitor short-circuit protection adopts high-voltage ejection fuse. Capacitor bank protection can use open triangle voltage. Protect.
Scope of application
It is widely used in industries such as power systems, mines, cement, electrification, railways, petrochemical industry, metallurgy, shipbuilding, automobile manufacturing, etc. where the load fluctuates frequently and the impactful harmonic content seriously exceeds the standard.