POWER QUALITY SYSTEMS

Power Quality Systems

Active Power Filters (APF)

Active Power Filter

Delta's Active Power Filter APF2000 is your key to a clean grid for more efficient production. Today's automation equipment benefits us with a more convenient life style and cost savings from higher production efficiency, however it can also bring significant power distortion problems that can lead to energy loss, increasing costs and many other power quality issues.


Power quality is a major influence on power efficiency. A clean and efficient power system normally generates a sinusoidal current waveform, but the electric equipment used in today's industrial automation industry generates non-sinusoidal currents that tend to cause power quality problems. Voltage or current distortion, reactive power impact, and unbalanced loads, are common problems that lower power reliability and power efficiency and also increase operation costs. Major concerns in the industrial automation industry are how to improve power quality and how to manage power grids.


Delta's APF2000 adopts the industry's highest standard 32-bit digital microprocessor to instantly compensate for all types of harmonics for ultimate power quality improvement. Perfect control of harmonic distortion reduces power loss and heat generation. The APF2000 is compact in design for all users to manage their space efficiently and is mounted with 65,536-color TFT HMI for more realistic images and a vivid display. The ultimate mission of Delta's APF2000 is to provide you with improved power quality, lower energy loss and lower maintenance costs

Delta's Active Power Filter - APF2000

Delta's Active Power Filter - APF2000 is a power filter device that can monitor load current and filter harmonics in real-time to maintain a clean line current. It monitors the load current in real-time using a current transformer and injects the exact opposite phase to the network of components that are to be filtered. It can also provide leading and lagging reactive current in real-time to improve the power factor and compensate reactive power.

Delta Active Power Filter - APF2000

Metallurgy and petrochemicals industries: rectifiers, converters, rolling mills, electric arc furnaces, medium frequency furnaces, inverters


Chemical and electrolysis industries: rectifiers, calcium carbide furnaces, electric soldering, inverters


Mechanical industries: rectifiers, rolling mills, inverters, electric arc equipment

Metal, paper, plastic processing and textile industries: rectifiers, rolling mills, inverters, electric arc furnaces, electric furnaces


Transportation industries: rectifiers and inverters for electric vehicles, electric motorcycles and metro systems


Automobile manufacturing industry: soldering equipment, car painting equipment, battery chargers and inverters


Telecommunication, medical and construction industries: Server stations, EPS, UPE, converters, chargers, inverters

Delta Active Power Filter - APF2000

Excellent filtering result and provides harmonics compensation up to 90%


Compensation for harmonic current, reactive power, power factor and load balancing


Advanced Modular Design: Safe, Reliable, Labor-saving


Provides diversified communication network and optional fieldbus cards


Static Var Generators (SVG)

Delta SVG 2000

Delta's SVG2000 is a Static Var Generator (SVG) that improves power quality. Compared to a traditional Static Var Compensator (SVC) with an LC system, Delta's SVG2000 offers many excellent features including enhanced stability, extended product lifetime, fast response, wide power range, large capacity, smooth tuning, low harmonics, stable system voltage, and many more, for greatly improved power quality.

Power quality is a major influence on power efficiency. Excellent power quality reduces energy loss and extends equipment lifetime for lower cost. In contrast, poor power quality caused by harmonics distortion, reactive power, or non-linear loads, tends to lower power reliability and utility. As many industries and applications continue to adopt a wide variety of electronic equipment to facilitate the production process, power quality distortion has become a common problem. The SVG2000offers a way to solve this critical issue by properly managing power quality.


The SVG2000'scompact design allows you to manage your installation space efficiently and the high standard color HMI provides realistic images and a vivid display. The SVG2000's excellent feature set helps to reduce energy loss, lower maintenance cost and maximise your utility.   

Delta's Active Power Filter - APF2000

Delta's SVG 2000 series is a current type Static Var Compensator (SVC). It is a full-bridge structure power module designed with a choke to allow direct connection to the power grid for power quality control. Fundamentally, the SGVG2000generates output voltage to control the amplitude and phase of the output current. It absorbs or supplies the accurate amount of reactive power to the system and precisely regulates the reactive power output. The SVG2000 Series is capable of directly monitoring the AC power side of the current and it compensates the harmonic current or the surge current that occurs at impact load.

Delta Active Power Filter - APF2000

Industries including petrochemicals, railway transportation, metallurgy, steel, manufacturing, medical, and building automation.

Delta Active Power Filter - APF2000

Improves power factor | Continuously outputs and compensates reactive power to maintain power factor >0.99. The compensation performance is 1.2 times better than a traditional compensation device (capacitor)


Suppresses harmonics | Configures the required amount of reactive current in real-time and compensates the reactive power to filter high order harmonics


Fast response | Fast configuration capability provides fast analysis and response time. Provides cycle response <20ms and dynamic response <500us


Low voltage benefits | Output current is not affected by the mains voltage fluctuation, providing stable support for mains voltage


Low consumption rate and high operation efficiency | Adopts new standard IGBT with low power consumption rate and improves full set device efficiency up to 96%. The system provides low power consumption


Modular design, easy extension | No need for additional reactor or capacitors and the compact design reduces volume by20~30%. It is easy to maintain with a specially designed air path that facilitates module assembly and extension.


Highly reliable and safe | Robust design for power system eliminates resonance problems, with no more amplified harmonic current and voltage. It extends components' life cycle and protects the system.

Power Factor Correction System (PFC)

What is Power Factor Correction?

The power factor of an AC electrical power system is defined as the ratio of the real power flowing to the load to the apparent power in the circuit. A power factor of less than one means that the voltage and current waveforms are not in phase, reducing the instantaneous product of the two waveforms (V x I). Real power is the capacity of the circuit for performing work in a particular time. Apparent power is the product of the current and voltage of the circuit. Due to energy stored in the load and returned to the source, or due to a non-linear load that distorts the wave shape of the current drawn from the source, the apparent power will be greater than the real power.

In an electric power system, a load with a low power factor draws more current than a load with a high power factor for the same amount of useful power transferred. The higher currents increase the energy lost in the distribution system, and require larger wires and other equipment. Because of the costs of larger equipment and wasted energy, electrical utilities will usually charge a higher cost to industrial or commercial customers where there is a low power factor.


Major Benefits

  • Avoid kVA penalty charges
  • Improve energy efficiency
  • Increase load capacity
  • Increase equipment service life


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