Description
The GY-SVG-5k/2L Single-Phase Static Var Generator is a compact 220V, 5 kvar single-phase SVG (L/N wiring) that delivers real-time reactive power compensation, power-factor correction to ≥ 0.99 and dynamic voltage stabilisation for single-phase commercial, telecom, hospitality and distributed-PV applications — with a transient response under 50 µs and a full response under 10 ms.
GY-SVG-5k/2L 220V Single-Phase SVG — Overview
While the rest of the GY-SVG family (220V / 380V / 500V / 690V / 800V three-phase modules) is engineered for 3P3W and 3P4W industrial grids, the GY-SVG-5k/2L is the single-phase variant — designed specifically to compensate phase-to-neutral (L/N) loads on 220V single-phase distribution.
It uses the same DSP + CPLD three-level digital control core as the three-phase platform, but with a dedicated single-phase H-bridge output stage, making it the ideal solution wherever a full three-phase SVG would be over-specified — for example, telecom rooms, single-phase PV inverters, small workshops, lighting feeders, and residential / light commercial bus risers.
How the Single-Phase GY-SVG-5k/2L Differs from the 3-Phase GY-SVG
| Item | GY-SVG-5k/2L (Single-Phase) | GY-SVG 3-Phase Models |
|---|---|---|
| Wiring | L / N (1P2W) | 3P3W / 3P4W |
| Topology | Single-phase H-bridge, 3-level | Three-phase 3-level (NPC) |
| Capacity | 5 kvar fixed | 5 – 150 kvar per module |
| Function | Reactive compensation + voltage stabilisation | Reactive + 3-phase unbalance compensation |
| Typical use | Telecom, single-phase PV, small commercial | Industrial plants, EV charging, wind / solar farms |
| CT requirement | 1× external CT on L line | 3× external CTs |
Working Principle
The GY-SVG-5k/2L connects a voltage source converter (VSC) to the single-phase line in parallel with the load through an LCL filter. By precisely regulating the amplitude and phase of the converter’s AC-side output voltage, the unit instantaneously generates an equal-and-opposite leading or lagging reactive current that cancels the reactive demand of the load. The result: power factor is driven to ≥ 0.99, line losses fall, and bus voltage on the single-phase feeder is stabilised — with no resonance risk, no over-compensation and no contactor switching wear typical of capacitor-bank solutions.
Key Performance Highlights
Full-Digital Control Core
DSP (TI 28335) + CPLD architecture, three-level topology, advanced reactive-power detection algorithm and PWM control strategy.
Single-Phase Dedicated Design
L/N wiring with a single-phase H-bridge — perfectly matched to phase-to-neutral loads where a 3-phase SVG would be oversized and inefficient.
Millisecond-Level Response
Transient response < 50 µs and full response < 10 ms — ideal for dynamic loads such as single-phase welders, lifts and lighting circuits.
Step-less & Bidirectional
Continuously injects exactly the kvar required — both inductive and capacitive — with no over- or under-compensation and zero resonance risk.
High Compensation Accuracy
Reactive power compensation rate ≥ 99%; power factor corrected to ≥ 0.99 across the full operating range.
Modular & Scalable
Unlimited parallel connection on the same feeder — scale 5 kvar → 50 kvar → 100 kvar+ by simply adding modules.
Wi-Fi & RS485 Communication
Two RS485 ports and Wi-Fi support for remote monitoring, parameter configuration and diagnostics from a phone or laptop.
Independent Air Duct Design
Separated cooling ducts and isolated PCB compartments ensure long-term stability in dusty or warm installation environments.
Typical Single-Phase Applications
Distributed single-phase PV inverters
Small workshops & light industry
Hotels, hospitality & restaurants
Hospitals & medical imaging (1-ph)
Single-phase EV charge points
Commercial lighting feeders
Data-room rack PDUs
Residential bus risers
Why Choose the GY-SVG-5k/2L
- Power factor improved to ≥ 0.99 — eliminates utility low-PF penalties.
- Reduced line losses and transformer / cable heating on the single-phase feeder.
- Stabilised single-phase bus voltage and fewer nuisance breaker trips.
- Step-less, bidirectional compensation — no resonance, no over-compensation.
- Plug-in modular maintenance with minimal downtime.
- Same GY-SVG control platform — single supplier for both single-phase and three-phase site requirements.
Installation Guidelines
- Connection: The SVG is installed in parallel with the single-phase load — load current does not flow through the unit.
- Wiring: L / N (1P2W) only. Verify grid voltage is AC 220 V before energising.
- Current Transformer: Use 1× external CT on the line conductor; confirm CT polarity and ratio in the HMI before commissioning.
- Ventilation: Keep clearance around air inlet / outlet; cooling is forced air with independent ducts. Maintain ambient between -10 °C and +50 °C (derate above 40 °C).
- Altitude: Derate capacity per GB/T 3859.2 above 2000 m.
- Cable entry: Rear entry for rack-mount versions, top entry for wall-mount versions.
- Grounding: Reliable PE grounding is mandatory for EMC performance and personal safety.
- Parallel operation: When parallelling modules on one feeder, ensure consistent CT signal distribution and matching firmware versions.
- Commissioning: Set target power-factor and protection thresholds via the HMI or the Wi-Fi tool before energising the load.
- Maintenance: Periodically clean the air filter; modules are plug-in replaceable to minimise downtime.
