Overview of Static Var Generator

Static Var Generator (SVG) also known as instantaneous stepless reactive power compensators are the ultimate answer to power quality problems caused by low power factor and reactive power demand for a wide  range of segments and applications.

They are a high performance, compact, flexible, modular and cost-effective type of active power filters (APF) that provide an instantaneous and effective  response to power quality problems in low or high voltage electric power systems.

They enable longer equipment lifetime, higher process reliability, improved power system capacity and stability, and reduced energy losses, complying with most demanding power quality standards and grid codes.

Low power factor increases the active energy losses of installations and affects their stability. It is typically caused by inductive or capacitive loads that demand extra reactive power to perform properly. Other contributors to low power factor are harmonic currents produced by nonlinear loads and the change of load in the electric power system.
SVG deliver real-time inductive or capacitive reactive power compensation. Rapid response time provides stable and accurate power factor correction without the drawbacks of conventional solutions like capacitor banks and reactor banks.

Principle of SVG

Static Var Generator is a power electronics-based device connected in parallel with the load that requires harmonics mitigation. SVG works as a controlled current source providing any kind of current waveform in real time.

When the load generates inductive or capacitive current, it makes load current lagging or leading the voltage. An SVG detects the pase angle difference and injects in real time leading or lagging current into the electric power systems, making the phase angle of the current almost the same as that of the voltage, bringing fundamental power factor to unity.

Key features of SVG

◆PRECISE COMPENSATION
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).

◆CAPABLE OF INDUCTIVE AND CAPACITE COMPENSATION
Realize inductive and capacitive compensation, avoid under and over compensation issues.

◆SUPPRESS 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 <5ms and dynamic response <200us.

◆LOW VOLTAGE BENEFITS
Output current is not affected by the mains voltage fluctuation, providing stable support for mains voltage.

◆MINIMAL LOSS, BETTER ENERGYEFFICIENCY
Adopts new standard IGBT with low power consumption rate and improves full set device efficiency up to 97%. 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.

◆HIGH RELIABILITY AND SAFETY
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.

ZDDQ Related Products

Low voltage Static VAR Generator Modular(400V)

Low voltage Static VAR Generator(400v)

Advanced Static Var Generator

Medium voltage Static VAR Generator(6KV 10KV 35KV)