SVG Reactive Power Compensation: A New Type of Reactive Power Compensation Equipment
Category:
Electrical Engineering/Distribution and transmission equipment/Compensation device
Model:
other
Brand:
New Baite/XINBAITE
Retail Price
25,000.00USD
重量
kg
- Product Description
-
Description :
SVGreactive power compensator
I. Overview
SVG is a typical power electronic device, consisting of three basic functional modules: detection module, control operation module, and compensation output module. Its working principle is based on the current information from the external CT detection system, which is then analyzed by the control chip to obtain the current information, such as PF, S, Q, etc; Then, the controller provides a compensating driving signal, and the inverter circuit composed of power electronic inverter circuit emits a compensating current. The advanced SVG product is STATCOM - Static Synchronous Reactive Power Compensator. The SVG static reactive power generator uses switchable power electronic devices (IGBT) to form a self commutation bridge circuit, which is connected in parallel to the power grid through a reactor. The amplitude and phase of the AC output voltage of the bridge circuit are appropriately adjusted, or its AC current is directly controlled. Quickly absorb or emit the required reactive power to achieve rapid dynamic adjustment of reactive power. As an active compensation device, it can not only track the impulse current of impulse loads, but also track and compensate for harmonic currents.
2、 Technical Comparison
Compared to traditional LC filtering circuits, SVG mainly has the advantages of excellent reactive power compensation performance, support for compensating unbalanced loads, and compensating for zero sequence harmonic currents (mainly 3rd order), which are not available in compensation circuits composed of traditional LC circuits.
The specific comparison is as follows:
comparison items
Traditional LC circuit
Sinexcel series SVG
INAS-S series STATCOM
stability
The compensation circuit composed of LC is prone to resonance with the system
Not affected by system harmonics, real-time dynamic compensation, more stable system
No resonance and partial harmonic generation
lifespan
The actual service life usually does not exceed 3 years, with frequent replacement every year or every March, and even tripping when switching on or off
Because there is no issue of resonance overvoltage, it can be used for a long time (MTBF greater than 100000 hours)
The lifespan can reach 15 years
Fast response time
Due to the hierarchical switching, there is no fast response time
Less than 300us, can compensate for rapidly fluctuating loads
Less than 100us
response time
Over 20ms
Less than 5ms
Less than 5ms
Operating range
Generally 0~1, (TCR can reach -1~1), slow switching time
-1~1, calm to emotional adjustment, and can quickly switch
Continuous arbitrary adjustment
Capacity stability
The capacity of capacitors generally decreases every year, and it is recommended to operate for no more than 4 years;
Stable capacity for long-term use
Stable capacity, long-term use
Adjust smoothness
Graded regulation, generally with a switching capacity of 20-60kvar
Stepless adjustment can always ensure stability at the target PF.
Stable power factor above 0.98
harmonic content
larger
Extremely low harmonic content, will not cause secondary pollution to the power grid
No harmonics, and can have some harmonics
stable voltage
Overcharging or undercharging or causing overvoltage or undervoltage of the system voltage
There will be no over or under compensation, which can effectively stabilize the system voltage
There is no phenomenon of over supplementation or under supplementation
Capacity adequacy
When the system voltage is low, it is also a time when the system needs reactive power compensation. However, due to the low system voltage, the compensation capacity of the LC compensation circuit will decrease, making it difficult to provide sufficient compensation capacity.
Due to the use of active compensation circuits, the compensation capacity is basically not affected by the system voltage, and sufficient compensation capacity can be provided under various operating conditions
Can fully achieve the rated compensation capacity
AfterSalesService :
Key words:- SVG reactive power compensation
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