ZDDQ -Â Model SVG - 480V Static Var Generator
The Static Var Generator Module is a critical component within electrical power systems that aids in dynamic reactive power compensation. Its primary function is to maintain voltage stability and improve power quality by injecting reactive power into the system dynamically. This module is highly adaptive, capable of responding to real-time changes in power demand, thereby enhancing system efficiency. It is particularly effective in applications involving heavy inductive loads such as motors and arc furnaces, where voltage fluctuations can be problematic. Technologically advanced, this module features fast-switching capabilities and is designed to handle high power ratings with superior thermal management. As part of modern electrical infrastructure, it's indispensable for optimizing power factor, reducing harmonic distortion, and mitigating issues related to voltage sags and swells.
Static Var Generator Overview
Static var generator (SVG for short), based on voltage type inverter principle, uses the isolated gate binary transistor (IGBT4) to control the value and phase of AC voltage of inverter, so as to serve the purpose of reactive and harmonic compensation. As the switching frequency of IGBT is very high (dozens of kHz), SVG can realize fast compensation for reactive load, and achieve very high compensation precision.
Static Var Generator is currently the best solution in reactive power control filed. Compared with the traditional SVC represented by TSC, the regulation speed of SVG is faster (the response speed is within 5ms), its compensation precision is high (the power factor after compensation is over 0.99), the compensation method is flexible (SVG can compensate both inductive reactive power and capacitive reactive power), and SVG also has the function of active filtration of harmonic current.
ZDDQ 480V SVG is designed for some special places, such as sites with unstable voltage.
- Rated Voltage : 480Vac Static Var Generator
- Electric Connection : 3P3W/3P4W
- Rated Frequency : 50Hz (60Hz) +/- 10%
- Rated Current per Module : 30Kvar,50Kvar, 75Kvar, 100kvar
- Rated Current per Cabinet : 30~600Kvar (module combination)
- Compensation Mode : Compensate Harmonics, Reactive Power, Phase imbalance
- Reactive Power Compensation Performance : Cosφ≥0.99 after compensation (if the SVG capacity is sufficient)
- Reactive Power Compensation Capability : Both inductive and capacitive reactive power compensation
- Harmonic Filtering Performance : Filter up to 98% harmonics at rated load
- Imbalance Correction Capability : Mitigate negative and zero sequence
- Full Response time : <5ms
- Thermal Loss : ≤3% of SVG rated capacity (kVA)
- Parallel Expansion(System) : Up to 10 Racks(4 modules per cabinet)
- Communication : Modbus Protocol, RS232/485
- Controller : DSP IGBT FPGA control
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.
- Multifunctional: Reactive power and imbalance compensation
- Excellent reactive compensation: High speed, Precise (-0.99≤Cosφ≤0.99), Step-less, Bi-directional (capacitive and inductance) ompensation
- Excellent imbalance correction: Both negative and zero sequence, mitigates neutral current
- Wide input voltage & frequency range, adapts to tough electrical environment
- Low thermal loss (≤3% of rated SVG capacity), efficiency ≥ 97%
- High stability: Infinite impedance to grid, avoids harmonic resonance problem
- Flexible application: Modular design, embedded in standard or customized cabinet
- Easy installation and maintenance: Easy installation for SVG module replacement and expansion
- Wide capacity range: 50kvar~600kvar for a single cabinet, up to 10 cabinets in parallel
- Environmental adaptability: -10~50°C temperature, compatible with diesel generators
- Complete protection: Grid over/under voltage, SVG over current, over temperature, and others. All faults recorded inevent log, convenient for failure analysis.