STATIC VAR GENERATOR

STATIC VAR GENERATOR (SVG)

SVG Principle

The principle of the SVG is very similar to that of Active Power Filter, as demonstrated in the picture below. When the load is generating inductive or capacitive current, it makes load current lagging or leading the voltage. SVG detects the phase angle difference and generates leading or lagging current into the grid, making the phase angle of current almost the same as that of voltage on the transformer side, which means fundamental power factor is unit.

Delta’s PQC series SVG is also capable of correcting load imbalance and compensating part of harmonic currents.

Note: CT is a critical part of the SVG system, and it can be purchased by users themselves, following Delta’s suggestions on CT specification.

SVG Principle

SVG - Waveform and Vector

SVG Structure

Delta PQC Series SVG has a modular design, which adopted 3-level inverter topology with 3pcs modular IGBT and DC capacitor components, and the Delta SVG system consists of one or several SVG modules and a HMI display.

SVG’s HMI can be shared with Delta APF modules. Each SVG module is an independent reactive power compensation system, and users can change the SVG rating by adding or removing SVG modules.

Product Introduction

SVG Module and Cabinet Solutions

According to cable terminal type, a modular SVG can be divided into two types:

  • Drawer type modular SVG (adding pluggable accessories on power cable terminals)
  • Mixed fixed type modular SVG(Power cables are fixed from rear side, Signal cables are fixed from front side.)

HMI has two types:

  • 7’’ HMI
  • 10’’ HMI

SVG modules and HMI panel can be embedded in Delta’s standard SVG cabinet or a customized cabinet. There are breakers, cable terminals and Surge Protection Device (SPD) in the SVG cabinet. Delta can supply IP30, IP42, IP54 or customized solutions.

SVG module and cabinet solutions

Wall-mounted SVG Solutions

Delta’s Wall-mounted SVG can be installed on a wall, which is suitable for low rating applications, and wall-mounted type HMI can be installed on the wall-mounted SVG module, along with a mounting bracket to provide support and protection. Delta can supply IP30, IP42, IP54 or customized solutions.

SVG wall-mounted solutions

Features & Benefits
  • Multifunctional: Reactive power, imbalance and part of Harmonic compensation
  • Excellent reactive compensation: High speed, Precise (-0.99 ≤ Cosφ ≤ 0.99), Step-less, Bi-directional (capacitive and inductance) compensation
  • Excellent imbalance correction: Both negative and zero sequence, mitigates neutral current
  • Harmonic Elimination Range: 2nd~25th order (Selectable)
  • Harmonic current capacity: 20% of rated current, 100 kvar SVG can output 30A H2-H25 harmonic compensation current
  • Wide input voltage & frequency range, adapts to tough electrical environment
  • Low thermal loss and high efficiency
  • 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: 25~700 kvar for a single cabinet, up to 10 cabinets in parallel
  • Environmental adaptability: -10~55°C temperature, compatible with diesel generators
  • Complete protection: Grid over/under voltage, SVG over current, over temperature, and others. All faults recorded in event log, convenient for failure analysis
  • Waveform display function on HMI: Display waveform of input Voltage, Grid current, Load current and SVG current
  • Display Harmonic current Histogram on HMI: Grid harmonic current and load harmonic current
  • CTs’ reversal auto correction can be setted on HMI, support grid side or load side current detection
Specifications

Mixed Fixed Type Products

  1. Rated Voltage: AC 208 V, AC 400 V
  3. Electrical Specification
  4. Input Voltage Range
    AC 208 V: AC 166~250 V
    AC 400 V: AC 228~456 V, AC 228~480 V
  5. Electric Connection: 3P4W, 3P3W
  6. Rated Capacity per Module
    AC 208 V: 25 kvar / 50 kvar
    AC 400 V: 50 kvar / 100 kvar
  7. Rated Current per Cabinet
    AC 208 V: 25~350 kvar (Module combination)
    AC 400 V: 50~700 kvar (Module combination)
  8. Rated Frequency: 50(60) Hz ±10%
  9. Input Voltage THD Range: ≤ 15%
  10. Redundancy: Each module is an independent reactive compensation system
  11. Reactive Power Compensation Capability: Both inductive and capacitive reactive power
  12. Reactive Power Compensation Performance: Cosφ ≥ 0.99 after compensation (if the SVG capacity is sufficient)
  13. Imbalance Correction Capability: Mitigate negative and zero sequence
  14. Harmonic Elimination Range: 2nd~25th order (Selectable)
  15. Harmonic Current Capacity: 20% of rated current
  16. Full Response Time: < 10 ms
  17. Instant Response Time: < 100 us
  18. Thermal Loss
    AC 208 V: ≤ 5% of SVG rated capacity
    AC 400 V: ≤ 3% of SVG rated capacity
  19. Output Current Limitation: Automatic (100% rated capacity)
  20. Parallel Expansion (System): Up to 10 Racks (7 modules per cabinet)
  21. MTBF: > 100,000 hours
  23. Control Technology
  24. Control Frequency: 30 kHz
  25. Controller: DSP + FPGA
  26. CT Position: Grid side or Load side
  27. Waveform Display: Input Voltage waveform, Grid current waveform, Load current waveform and SVG current waveform
  28. Harmonic Current Histogram Display: Grid harmonic current and load harmonic current
  29. Communication : Modbus RTU (RS-485), Modbus TCP/IP (Ethernet)
  31. Physical Specification
  32. IP Grade of Cabinet: IP20, IP30, IP54, IP55 or customization
  33. Cooling Method: Intelligent forced air cooling
  34. Noise Level: < 65 dB(A) @ 1 m (Module)
  35. Dust Filter: Optional
  36. Dimension: Please download the brochure and refer to SVG model table
  37. Weight: Please download the brochure and refer to SVG model table
  39. Environmental Requirement
  40. Ambient Temperature: -10~55°C
  41. Relative Humidity: 0~95% (No condensation)
  42. Altitude: ≤ 1000 m (Rated capacity), 1000~3000 m (De-rating 1% per 100 m)

Rear/Front Connection Type Products

  1. Electrical Specification
  2. Rated Voltage: AC 400 V
  3. Input Voltage Range: AC 308~456 V, AC 308~480 V
  4. Electric Connection: 3P4W, 3P3W
  5. Rated Frequency: 50(60) Hz ±10%
  6. Rated Capacity per Module: 50 kvar / 100 kvar
  7. Rated Current per Cabinet: 50~700 kvar (module combination)
  8. Redundancy: Each module is an independent reactive compensation system
  9. Reactive Power Compensation Capability: Both inductive and capacitive reactive power
  10. Reactive Power Compensation Performance: Cosφ ≥ 0.99 after compensation (if the SVG capacity is sufficient)
  11. Imbalance Correction Capability: Mitigate negative and zero sequence
  12. Full Response Time: < 20 ms
  13. Instant Response Time: < 100 us
  14. Thermal Loss: ≤ 3% of SVG rated capacity
  15. Output Current Limitation: Automatic (100% rated capacity)
  16. Parallel Expansion (System): Up to 10 Racks (7 modules per cabinet)
  17. MTBF: > 100,000 hours
  19. Control Technology
  20. Switching Frequency: 30 kHz
  21. Controller: DSP control
  22. Communication : Modbus RTU (RS-485), Modbus TCP/IP (Ethernet)
  24. Physical Specification
  25. IP Grade of Cabinet: IP20, IP30, IP42, IP54 or customization
  26. Cooling Method: Intelligent forced air cooling
  27. Noise Level: < 65 dB(A) @1m (Module)
  28. Dust Filter: Optional
  29. Dimension: Please download the brochure and refer to SVG model table
  30. Weight: Please download the brochure and refer to SVG model table
  32. Environmental Requirement
  33. Ambient Temperature:
    Rear connection type: -10~50°C with 100% capacity, de-rating running from 50~55°C
    Front connection type: -25~40°C with 100% capacity, de-rating running from 40~55°C
  34. Relative Humidity: 0~95% (No condensation)
  35. Altitude: ≤ 1000 m (rated capacity), 1000~2000 m (de-rating 1% per 100 m)
  38. All specifications are subject to change without prior notice.