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The Static Var Generator (SVG) operates by connecting a voltage-type inverter to the power grid in parallel through a filter, allowing for the adjustment of the AC output voltage's amplitude and phase. It dynamically and accurately compensates for reactive power in the power grid system, with an instantaneous response time of less than 50 microseconds and a full response time of less than 10 milliseconds, effectively preventing overcompensation and undercompensation. Currently, SVG stands out as the optimal solution in the field of reactive power compensation.
The principle of the SVG is very similar to that of Active Power 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. SVG is also capable of correcting load imbalance.
Where there is a low-voltage transformer installed and next to large electrical equipment should be equipped with reactive power compensation devices (this is the provisions of the national power department), especially those with low power factor industrial mines, enterprises, residential areas must be installed. Large asynchronous motors, transformers, welding machines, punches, lathes, air compressors, presses, cranes, smelting, steel rolling, aluminum rolling, large switches, electric irrigation equipment, electric locomotives, etc. In addition to incandescent lighting in residential areas, air conditioning, refrigerators, etc., are also reactive power consumption objects that can not be ignored. The rural electricity situation is relatively bad, most areas lack of power supply, voltage fluctuation is very large, power factor is especially low, installing compensation equipment is an effective measure to improve the power supply situation and improve the utilization rate of electric energy.
Reactive power compensation < 10ms, harmonic compensation < 20ms
This SVG is an advanced power system equipment, which can quickly respond to the needs of the grid, quickly compensate reactive power and suppress harmonics in a few milliseconds, maintain the voltage stability of the grid, reduce voltage fluctuations, extend the life of the equipment, SVG can correct the power factor to close to 1, which means that the active power in the grid has been more effective use.
2. MD (modular design)
Easy to maintain and expand: The modular design allows individual components to be replaced and upgraded independently, making it easy to maintain and extend the functionality of SVG devices without requiring large-scale changes to the entire system. The modular design provides the flexibility to customize SVG solutions according to specific needs, and modules can be easily added or removed to meet different application needs. Modular design can reduce the impact of a single point of failure on the entire system, thereby reducing maintenance costs and downtime.
TYPE | Series 220V | Series 400V | Series 500V | Series 690V |
Max neutral w ire current | 5KVar | 10KVar15KVar/ 35KVar/50KVar/ 75KVar/100KVar | 90KVar | 120KVar |
Nominal voltage | AC220V(-20%~+20%) | AC380V(-20%~+20%) | AC500V(-20%~+20%) | AC690V(-20%~+20%) |
Rated frequency | 50Hz±5% | |||
Network | Single phase | Three-phase three-wire/three-phase four-wire | ||
Response time | <10ms | |||
Reactive power compensation rate | >95% | |||
Machine efficiency | >97% | |||
Switching frequency | 32kHz | 16kHz | 12.8kHz | 12.8kHz |
Feature selection | Deal with harmonics/Deal with harmonics and reactive power | Deal with harmonics/Deal with harmonics and reactive power/ Deal with harmonics and three-phase unbalance /Three options | ||
Numbers in parallel | 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/WIFIwireless communication) | |||
Altitude w ithout derating | <2000m | |||
Temperature | -20~+50°C | |||
Humidity | <90% RH | |||
Pollution level | Below level Ⅲ | |||
Protection function | Overload protection, hardware over-current protection, over-voltage protection, power grid voltage imbalance protection, power | |||
Noise | <50dB | <60dB | <65dB | |
Installation | Rack/wall hanging | Rack | ||
Into the way of line | Back entry (rack type), top entry (wall-mounted) | Top entry | ||
Protection grade | IP20 |