Static Var Generator SVG
S V G is a device that uses self-converting phase power semiconductor bridge converters to perform dynamic reactive power compensation. K C S V G 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.
Application
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
Feature
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
| Product | KCSVG | KCASVG |
| Grid voltage (V) | 400(-40%~ +20%) 690(-30%~ 10%) | 400V (-40%” +20%) 690V (-30% 10%) |
| Grid frequency (HZ) | 45~ 63 | 45’~63 |
| Overall efficiency | >98% | >97% |
| Compensation range | -1~1 | -1~1 |
| Response time | <1ms | < 1ms |
| cooling method | Smart Air Cooling | Smart Air Cooling |
| Communication Interface | RS485 CAN | RS485 CAN |
| Protocol | Modbus | Modbus |
| operating temperature | -225 | 5~ +45 |
Feature
- 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;
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