FGSVG G61 Type Static Var Generator Smarter Reactive Power Compensation Better Power Quality

The SVG (Static Var Generator) operates by connecting a voltage-source converter (VSC), composed of a self-commutated bridge circuit using IGBT devices, in parallel with the power grid through a transformer or reactor. By controlling the switching of the IGBT modules, the DC voltage is converted into an AC output with adjustable amplitude and phase.

For an ideal SVG with negligible active power loss, reactive power compensation is achieved solely by adjusting the output voltage amplitude:

• When the output voltage is lower than the grid voltage, the SVG operates in an inductive mode, absorbing reactive power (acting like a reactor).
• When the output voltage is higher than the grid voltage, it operates in a capacitive mode, supplying reactive power (acting like a capacitor).

SVG systems are categorized into:

• Direct-connection type: typically used for 6kV, 10kV, and 35kV applications.
• Step-down connection type: generally applied on a 10kV low-voltage side.

The choice of connection depends on the grid voltage level at the point of interconnection and the required compensation capacity. The system uses a cascaded H-bridge topology, and the connection structure can be configured as either star (Y) or delta (Δ), depending on application requirements.

• Intelligent Human-Machine Interaction, Simplified Commissioning - Features intelligent startup self-check function, reducing commissioning complexity and shortening deployment cycle.
• Advanced Recording and Diagnostic Functions - Equipped with real-time waveform recording and fault trace analysis for precise monitoring.
• Self-Adaptive Phase Sequence Recognition - Automatically identifies and adapts to phase sequence, streamlining installation.
• Multi-Level Networking, Seamless Capacity Expansion - Supports high-speed optical fiber communication for easy reactive power capacity expansion.
• Intelligent Operating Mode Switching - Automatically switches between normal and fault operating modes.
• Remote Monitoring via APP & Flexible Communication Interfaces - Offers rich communication interfaces including RS485, CAN, Ethernet, and GPRS.

• Quick Response - Controller response time ≤1ms and full power response time ≤5ms
• Negative Sequence Suppression - Compensates for negative sequence current caused by load imbalances
• Multiple Operating Modes - Supports constant reactive power, constant power factor, constant voltage modes
• Harmonic Mitigation - Effectively compensates for harmonics up to the 13th order
• Long-Distance Power Transmission Support - Improves voltage, reduces losses, and provides quick reactive power regulation
• Comprehensive Protection - Three levels of protection safeguard the device from faults
• Modular Design - Facilitates easy installation and maintenance
• IP44 Protection - Available for harsh environments with high dust or humidity

• Indoor Cleanliness - Ensure installation environment is clean and dry
• Pest Control - Implement anti-rodent measures
• Temperature Management - Maintain ambient temperature below 38°C
• Post-Startup Fastening Check - Tighten all connections about one week after commissioning
• Daily Inspection - Check for unusual noises, weak airflow, or abnormal smells
• Annual Preventive Maintenance - Schedule shutdown at least once per year for internal inspection

Case 1: Ferroalloy Furnace Application in Zhengzhou, Henan

Location: Zhengzhou City, Henan Province

Compensation Capacity: -2000kvar to +2000kvar

System Voltage: 6kV

Results: Significant reduction in three-phase imbalance, power factor improved to meet utility requirements

Case 2: Wind Power Station Application in Yantai, Shandong

Location: Yantai City, Shandong Province

Compensation Capacity: -10000kvar to +10000kvar

System Voltage: 35kV

Results: System voltage stabilized, power factor raised to 0.96, complies with national standards

Case 3: Induction Furnace Application in Xuzhou, Jiangsu

Location: Xuzhou City, Jiangsu Province

Compensation Capacity: -4000kvar to +4000kvar

System Voltage: 6kV

Results: Harmonic current compensation efficiency up to 70% below 19th order, meets national standards

• Renewable energy integration - Stabilizes voltage in solar and wind farms
• Industrial power quality management - Dynamic current compensation for heavy industrial loads
• Grid and transmission line stability - Voltage stability during load variations