Manufacturer of Low and Medium Voltage Switchgear

Static Var Generator SVG

SVG is a device that uses self-converting phase power semiconductor bridge converters to perform dynamic reactive power compensation. KCSVG is currently the best solution in the field of reactive power control. Compared with traditional cameras, capacitor reactors, and traditional SVC mainly represented by thyristor-controlled reactor TCR, KC SVG has unparalleled advantages.


It is suitable for places where low voltage systems have distribution transformers. Focus on urban rail transit, automobile manufacturing, shipbuilding, chemical industry, steel, metallurgy, playgrounds and other occasions

The basic principle is to connect the self-commutated bridge circuit in parallel with the power grid directly through the reactor, and appropriately adjust the phase and copy of the output voltage on the AC side of the bridge circuit or directly control the current on the AC side, so that K C S V G is inductive on the power grid side. or capacitive, so that the circuit absorbs or emits reactive current that meets the requirements, and realizes the purpose of dynamic reactive power compensation.

GB/T12 325-2008 Power Quality Supply Voltage Deviation
GB/T15 945-2008 Frequency Deviation of Power Quality Power System
GB/T15 543- 2008 Power quality three-phase voltage balance
GB/T12 326- 2008 Power Quality Voltage Fluctuation and Flicker
GB/T14 549-1993 Power Quality Harmonics of Public Grid
GB/T243 37- 2009 Harmonics between public power grids
GB/T198 62-2005 General requirements for power quality and power quality monitoring equipment


1. The switchgear operates fast. It can operate within 30ms, which greatly shortens the duration of the single-phase grounding arc;
2. After the switchgear operates, the arc can be extinguished immediately, and the arc grounding overvoltage can be effectively limited to within √3 times;
3. After the switchgear operates, the system can be allowed to run continuously for more than 2 hours, and the user can deal with the faulty line after completing the switching operation of transferring the load;
4. The protection function of this installation is not affected by the scale and operation mode of the power grid;
5. The switchgear has high function and cost performance, and the voltage transformer can provide voltage signal to the meter and relay protection, which can replace the conventional PT switchgear


Grid voltage (V)400(-40%~ +20%) 690(-30%~ 10%)400V (-40%” +20%) 690V (-30% 10%)
Grid frequency (HZ)45~ 6345’~63
Overall efficiency>98%>97%
Compensation range-1~1-1~1
Response time<1ms< 1ms
cooling methodSmart Air CoolingSmart Air Cooling
Communication InterfaceRS485 CANRS485 CAN
operating temperature-2255~ +45


  • Stepless adjustment to avoid over-compensation and under-compensation;
  • Resonance is avoided from the mechanism, harmonics will not be generated, and other electrical equipment of the system will not be harmed;
  • Fast response, fast response time <1ms;
  • Modular structure, high integration: KC SVG adopts modular and cabinet installation, which is easy to design and install;
  • Using intelligent IGBT module, built-in protections include: short circuit, overcurrent, overheating, drive undervoltage, DC bus overvoltage, high reliability;
  • It can be set as required: only reactive power compensation, harmonic compensation and reactive power compensation at the same time;
ModelRated Voltage(kV)Rated Capacity(kvar)Size (W*D*H,mm)Installation method
KCSVG-0.4.100-L 100800*600*2200 
KCSVG-0.4-400-L 4002*(800*600*2200) 
KCSVG-0.69-150-L 150800*600*2200column type
KCSVG-0.69-400-L 4002*(800*600*2200) 
Note: If the demand exceeds the maximum compensation capacity of a single cabinet, multiple KCSVGs can be operated in parallel.
ModelRated Voltage(kV)Rated Capacity(kvar)Size (W*D*H,mm)Installation method
Note: KCSVG Wall Mount is only suitable for 400V low voltage system
Transformer capacity(KVA)315630800100012501600200025000
 Qutantity  (sets)112223
Qutantity  (sets) 1112233

Compensation Capacity Calculation

The system reactive power compensation capacity is determined by the following formula:
Q=βav PC (tanφ1-t anφ2) in the formula P C – the monthly maximum active power calculation load (kW) supplied by the substation and distribution;
βav—monthly average load rate, generally 0.7 ~ 0.8; φ1—power factor angle before compensation, cosβ1 can take the value of the maximum load;
φ2—Power factor angle after compensation, determined with reference to the requirements of the power sector, generally 0.9~0.95.
For example: the monthly maximum active power load of a substation is 2000kW, the average load rate is 0.75, the power factor before compensation is 0.6, and the target power factor is 0.95. The compensated power factor is:
Q = βa v PC (tanφ1-ta nφ2)
=0. 75*20 00*(tan arcc os0. 6-tan arc cos0.9 5)
= 1514 (kva r)
Considering a certain margin, a compensation device with a compensation capacity of 1 700 kvar can be selected

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