Power Quality Controls
SVG/APF/ Intelligent Capacitors/Anti-Harmonic Intelligent Capacitors

STATIC VAR GENERATOR(SVG)

SVG static reactive power generator adopts controllable power electronic components to send out reactive power and reverse filter compensation current, which can realize fast, accurate and bidirectional reactive power compensation.
Quickly and accurately filter harmonics of 13th order and less order harmonics, completely eliminating the risk of system harmonics.

It can also eliminate neutral harmonics and three-phase unbalance.

solve problems

SVG can solve following power quality problems:

  • Effectively reduce harmonic and reactive power components of the low voltage side of the transformer, thereby reducing heating and losses of distribution equipment such as transformer, main switch and busbar, and improving load capacity.
  • Replacing the reactive power compensation of capacitors eliminates the risk of L / C oscillation of capacitors.
  • Eliminate the neutral line harmonics and three-phase unbalance, and reduce the neutral line voltage.
  • Eliminates voltage fluctuations caused by reactive power fluctuations and reduces voltage fluctuations and flicker.
  • Reduce the impact of system harmonics and voltage harmonic distortion rate(THDu). *Guarantee system power factor higher than reqired value.
 
product features

Adopts power electronic technology

  • MODULAR STRUCTURE
  • HIGH RELIABILITY
  • STRONG ANTI-POLLUTION ABILITY
  • FLEXIBLE APPLICATION SOLUTION
  • EASY INSTALLATION, SIMPLE MAINTAIN
  • MULTI-FUNCTION SOLVE MULTIPLE ELECTRIC POWER PROBLEMS

 
Applications

Applicable Industry

  • Subway, airport, highway, medical treatment, offshore platform, communication and other high-end occasions
  • Port, vehicle and ship manufacturing, metallurgy, petrochemical, data center and other occasions
  • On-column Reactive Power Compensation and other Outdoor Occasions
  • Photovoltaic, shopping malls, residential buildings, ordinary factories and mines and other industries

Active Power Filter(APF)

Basing on application of power electronic technique, APF is the best soltion for filtering harmonics.

YDK-APF is suitable for multi application accasions. We can design the most suitable installation solution for industrial occasions, distribution rooms, machine rooms etc. Because of flexible installation and convenient operation, our active power filters bring huge conveniences for solution design, on-site installation and after- slae maintaining.

HARM OF HARMONIC

Harmonic harms are including as followings.

  • Increase line loss, causing cables overheated, insulation aging and reducing efficiency of power supply.
  • Make capacitors overload, overheated, breakdown and accelerated aging.
  • Cause electric equipments malfunction and no response and power outage.
  • Induce electric network syntony and cause harmonic over-voltage and over-current.
  • Affect effeciency and normal operation of electric motors, producing vibration and noise and reducing service life.
  • Damage sensitive devices in electric network and cause production equipments operate unsteadily.
  • Interference communication and electronic equipments, causing control system failure.
  • Zero-sequence harmonic will cause neutral current too high.Neutral lines will heating and burn up.
 

OPERATING PRINCIPLE

When APF connects to electric network in parallel, it will measure harmonics and generate reverse compensation current to filtering harmonics by inverting.

APF measures the real-time current signals by external CT, analyzing and getting data of harmonic content. According to measured data, APF will control IGBT to generate compensating current which has the same value and the reverse phase of electric network system’s harmonics, realizing the function of filtering harmonics.

Because APF’s compensating current outputs activly with the changing of system harmonic content, it will not be over compensated. Meanwhile, APF has a function of limiting input capacity which will protect APF to avoid over-load outputing effectively.