SNA-SVG-R Static Var Generator

Description

Technical

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Description

How does a SVG work?

An SVG continuously monitors the electrical network:

When the load consumes inductive reactive power, the SVG supplies capacitive reactive power.
When excess capacitive reactive power exists, the SVG absorbs it.
When the system is balanced, it maintains minimal compensation.

Its controller uses high-speed semiconductor switches—typically IGBTs—to create a controllable current that offsets unwanted reactive current.

Power factor correction

Corrects power factor by injecting a forward or reverse current to counter act reactive power in the system. This helps improve energy efficiency and reduce energy costs

Harmonic distortion

Eliminate harmonic distortion by detecting harmonic current and injecting acorresponding current in the opposite direction. This helps improve power quality and protect equipment from damage.

Voltage unbalance

SVG can balance currents and reduce voltage unbalance caused by uneven loads. However, it may not fully correct unbalance originating from upstream supply faults or severely unequal network.

Main benefits

Fast, dynamic reactive-power compensation
Improved power factor
Reduced voltage fluctuations and flicker
Lower current and transmission losses
Harmonic filtering capability
Independent compensation across three phases
Better performance than capacitor banks under changing loads

Compared with capacitor banks

Static Var Generator (SVG)

Technical

Specification

An active harmonic filter has a measurement system that "listens" for noise in the power system and generates a compensating current to cancel out that which is less than ideal. It uses active technology to reduce unwanted harmonic distortion, correct power factor and improve the voltage regulation and unbalance of the power grid.

	220V, 400V 3P3W/3P4W		480V, 550V, 690V 3P3W
Mounting type	Wall mounted	Rack mounted	Rack mounted
Network voltage range	±10%
Nominal current (A)	15/30/50/75/100/150		50/100
Frequency	50/60Hz (±5%)
Harmonic compensation	2nd ~ 51st harmonic order
Efficiency	≥97%
Response time	<10ms
Circuit topology	Three-level topology
Switching frequency	20 kHz - Reaction time: Approximately 50 ps
Parallel operation	Maximum of 20 units can be combined
Typical power loss	<3% (depending on the load)
Compensation mode	Harmonic, reactive power, unbalance
Target power factor	Adjustable from -1 to 1
Display	4.3inch/7inch/10 inch HMI
Communication ports	RS485 / Ethernet
Noise level	≤65dB
Operating Temperature	-20℃ to 45 ℃
Humidity	5% to 95% RH, non-condensing
Protection class	IP20
Design/Approvals	EN 61000-6-2:2005+AC:2005 EN 61000-6-4:2007+A1:2011 EN 50178:1997 IEEE519
Certification	CE