Working Principle
The principle of the SVG is very similar to that of Active harmonic Filter, 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. YIY-SVG is also capable of correcting load imbalance
Technical Specifications
| TYPE | 220V Series | 400V Series | 500V Series | 690V Series |
| Rated compensation capacity | 5KVar | 10KVar15KVar/35KVar/50KVar/75KVar/100KVar | 90KVar | 100KVar/120KVar |
| Nominal voltage | AC220V(-20%~+15%) | AC400V(-40%~+15%) | AC500V(-20%~+15%) | AC690V(-20%~+15%) |
| Rated frequency | 50/60Hz±5% | |||
| Network | Single phase | 3 phase 3 wire/3 phase 4 wire | ||
| Response time | <10ms | |||
| Reactive powe compensation rate | >95% | |||
| Machine efficiency | >97% | |||
| Switching frequency | 32kHz | 16kHz | ||
| Function | Reactive power compensation | |||
| Numbers in paralle | No limitation.A single centralized monitoring module can be equipped with up to 8 power modules | |||
| Communication methods | Two-channel RS485 communication interface (support GPRS/WIFI wireless communication) | |||
| Altitude without derating | <2000m | |||
| Temperature | 20~+50℃ | |||
| Humidity | <90%RH,The average monthly minimum temperature is 25°C without condensation on the surface | |||
| Pollution level | Below level I | |||
| Protection function | Overload protection,hardware over-current protection,over-voltage protection,power grid voltage protection power failure protection,over-temperature protection,frequency anomaly protection,short circuit protection, etc | |||
| Noise | <50dB | |||
| nstallation | RackWall-mounted | |||
| Into the way of line | Back entry (rack type),top entry (wall-mounted type) | |||
| Protection grade | IP20 | |||
Product naming
Product Appearance
| Capacitor Banks or Reactor Banks (LC) | Static Var Generators(SVG) | |
| Response time | • Contactor-based solutions take at least 30s to 40s to mitigate the problem and thyristor-based solutions 20ms to 30ms | ✔ Real-time mitigation of power quality problems as the overall response time is less than 100µs |
| Output | • Depends on step sizes, cannot match load demand in real time • Depends on grid voltage as capacitor units & reactors are used | ✔ Instantaneous, continuous, stepless and seamless ✔ Grid voltage fluctuation has no influence on the output |
| Power factor correction | • Capacitor banks needed for inductive loads and reactor banks for capacitive loads. Problems in systems with mixed loads • Not possible to guarantee unity power factor as they have steps, system will be having continuous over and undercompensation | ✔ Corrects simultaneously from -1 to +1 power factor of lagging (inductive) and leading (capacitive) loads ✔ Guaranteed unity power factor at all times without any over or undercompensation (stepless output) |
| Design & sizing | • Reactive power studies needed to size the proper solution • Usually oversized to better adjust to changing load demands • Need to be designed taking into account system harmonics • Custom-built for specific load and network conditions | ✔ Not required extensive studies as it is adjustable ✔ Mitigation capacity can be exactly what load demands ✔ Unaffected by harmonic distortion in the system ✔Can adapt to load and network conditions & changes |
| Resonance | • Parallel or series resonance can amplify currents in the system | ✔ No risk of harmonic resonance with the network |
| Overloading | • Possible due to slow response and/or variation of loads | ✔ Not possible as current limited to max. RMS current |
| Footprint & installation | • Medium to large footprint, especially if several harmonic orders • Not simple installation, especially if loads upgraded frequently | ✔ Small footprint and simple installation as modules are compact in size. Existing switchgear can be used |
| Expansion | • Limited and depends on load conditions and network topology | ✔ Simple (and not dependant) by adding modules |
| Maintenance & lifetime | • Using components that need extensive maintenance like fuses, circuit breakers, contactors, reactors and capacitor units • Switching, transients and resonance reduce lifetime | ✔ Simple maintenance and service life up to 15 years as there is no electro-mechanical switching and no risk of transients or resonance |
| Static VAR generator selection quick reference table | |||||
| Reactive power content Transformer capacity | C0Sφ≤0.5 | 0.5≤c0sφ≤0.6 | 0.6≤c0sφ≤0.7 | 0.7≤cosφ≤0.8 | 0.8≤cosφ≤0.9 |
| 200 kVA | 100 kva | 100 kva | 100 kvar | 100 kya | 100 kva |
| 250 kVA | 150 kvar | 100 kya | 100 kyar | 100 kvar | 100 kvar |
| 315 kVA | 200 kvar | 100 kvar | 100 kva | 100 kvar | 100kvar |
| 400 kVA | 200 kvar | 200 kya | 200 kyar | 150 kva | 100kvar |
| 500 kVA | 300 kvar | 300 kvar | 300 kvar | 150 kvar | 100 kvar |
| 630 kVA | 300 kva | 300 kvar | 300kvar | 200 kvar | 150kvar |
| 800 kVA | 500 kvar | 500 kva | 300kvar | 300 kvar | 150 kvar |
| 1000kVA | 600kva | 500kya | 500 kvar | 300 kva | 200 kvar |
| 1250 kVA | 700 kvar | 600 kvar | 600 kvar | 500 kvar | 300 kvar |
| 1600 kVA | 800 kya | 800 kvar | 800 kyar | 500 kva | 300 kvar |
| 2000 kVA | 1000 kvar | 1000 kvar | 800 kvar | 600 kvar | 300kvar |
| 2500 kVA | 1500 kvar | 1200 kvar | 1000 kvar | 8000 kvar | 500 kvar |
| *This table is for selection reference only, please contact us for specific selection | |||||
