GY-SVG-SiC-based Static Var Generator
GY-SVG-SiC is a next-generation SiC-based Static Var Generator designed for high-efficiency reactive power compensation. It integrates SiC power devices with DSP+CPLD full-digital three-level control technology, achieving peak efficiency up to 98.5% and full dynamic response within 10ms.
Supporting reactive power compensation, three-phase unbalance correction, and flexible compensation modes, GY-SVG-SiC features modular expansion capability and reliable parallel operation. It is ideal for advanced power quality management in renewable energy systems, industrial facilities, and commercial power networks.
•SiC Power Device Technology — Utilizes advanced silicon carbide (SiC) power devices to achieve peak efficiency up to 98.5%, improving system performance and long-term operating reliability.
•Fast Dynamic Response — High-frequency switching control enables rapid reactive power adjustment with transient response below 50μs and full compensation response within 10ms.
•High-Density Modular Design — Supports up to 8 modules per cabinet, reaching a maximum capacity of 800kvar, providing flexible expansion and optimized installation space.
•Comprehensive Power Quality Compensation — Provides dynamic reactive power compensation, three-phase unbalance correction (≤5%), and neutral zero-sequence current compensation for improved power system stability.
•Flexible Voltage & Installation Options — Available in 220V (37/50kvar) and 380V (75/100kvar) configurations, supporting rack-mounted and wall-mounted installation to meet different application requirements.
Product Features
Overview
Silicon Carbide Static Var Generator (GY-SVG-SiC)
Using silicon carbide (SiC) power devices as the core, the GY-SVG-SiC connects a voltage source converter (VSC) to the power grid via a filter in parallel. Its working principle is to dynamically and accurately compensate for reactive power in the grid system by adjusting the amplitude and phase of the output voltage on the AC side of the converter. The transient response time is less than 50μs, and the full response time is less than 10ms, thereby avoiding over-compensation and under-compensation. In addition, the device achieves a peak efficiency of over 98.5%. A single cabinet can accommodate up to 8 modules, with a maximum capacity of 800kvar, offering easy installation and maintenance.
Performance characteristics
1.DSP+CPLD full-digital control core, three-level topology technology, advanced reactive power detection algorithm and PWM control strategy.
2.Reduced module losses, improved module efficiency, peak efficiency up to 98.5% or higher.
3.High power density modular design; a single cabinet can accommodate 8 modules with a maximum capacity of 800 kvar, easy installation and maintenance.
4.Equipped with two external current sampling channels, supporting various compensation modes such as low-voltage side sampling with low-voltage side compensation, high-voltage side sampling with low-voltage side compensation, and reactive component compensation.
5.Higher switching frequency control algorithm reduces output ripple current and improves dynamic response speed.
6.Utilizes the higher voltage withstand capability of SiC power devices while simplifying thermal design and electromagnetic compatibility (EMC) design, enhancing product reliability.
7.Reactive power compensation capability: compensation rate ≥99%.
8.Unbalance compensation capability: unbalance degree after compensation ≤5%.
9.Dynamic response speed to load is millisecond-level, enabling accurate dynamic compensation for impact reactive power loads.
10.Neutral line zero-sequence current filtering capacity is three times that of the phase line.
11.Supports 100% current-limiting output to ensure long-term stable operation of the equipment.
12.Supports selectable compensation modes: reactive power compensation only, or reactive power compensation + three-phase unbalance compensation.
Technical Parameter
| Model | 220V | 380V |
| Altitude | <2000m; above 2000 m, derate according to GB/T 3859.2 | |
| Ambient temperature | -10 ~ +50℃ (above 40 ℃, capacity derating ≤30%) | |
| Relative humidity | ≤90% relative humidity, no condensation on the surface at a monthly minimum temperature of 25 ℃ | |
| Pollution degree | Pollution degree ≤ Class III | |
| Operating voltage | AC220V (-20%~+20%) | 380V (-20%~+20%) |
| Operating frequency | 50Hz/60Hz (45Hz~63Hz) | |
| Rated compensation capacity | 37kvar, 50kvar | 75kvar, 100kvar |
| Grid configuration | Three‑phase three‑wire, three‑phase four‑wire | |
| Number of parallel units | unlimited | |
| Overall efficiency | ≥97% | |
| Switching frequency | 30kHz | |
| Function selection | Reactive power compensation / Reactive power compensation + three‑phase unbalance compensation | |
| Reactive compensation rate | Reactive power compensation ≥99% | |
| Unbalance compensation capability | Unbalance degree after compensation ≤5% | |
| Full response time | <10ms | |
| Noise level | ≤65dB | |
| Communication method | 2 RS485 communication ports (Wi‑Fi supported) | |
| Protection functions | Overload, software/hardware overcurrent, grid overvoltage/undervoltage, grid voltage unbalance, power supply failure, overtemperature, frequency anomaly, short‑circuit protection, resonance protection, etc. | |
| Overload capability | Rated 1.2 times overload for 60 seconds | |
| Installation method | Rack / Wall‑mounted | |
| Cable entry | Rear cable entry (rack‑mount), top cable entry (wall‑mounted) | |
| Protection rating | IP20 (IP54 customizable) | |
| Neutral line filtering capability | Neutral line filtering capacity is 3 times that of phase filtering capacity | |
| Cooling method | Forced air cooling | |
| Electromagnetic compatibility | EMC (Electromagnetic Compatibility)‑ Radiated Emission (RE) and Conducted Emission (CE) meet Class A test standard | |
User Manual
Frequently Asked Questions About GY-SVG-SiC SiC-Based Static Var Generator
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