Comparison of SVC and SVG reactive power compensation devices

With the continuous advancement of reactive power compensation technology, two reactive power compensation devices, SVC (Static Var Compensator) and SVG (Static Var Generator), have been widely recognized. Although both are reactive power compensation devices, there are marked differences between them. Next, Shanghai Kunyou Electric Co., Ltd. will compare the two compensation devices to help you select equipment suitable for your needs.
 
Response Time 
Since SVC controls the switching of reactive power compensation capacitors through thyristors and other components, its switching time is longer than that of SVG. Generally, the response time of SVC is around 20 milliseconds, while that of SVG is less than 5 milliseconds.
 
Harmonic Problems 
As SVC uses thyristors, it generates harmonics during operation. In addition, SVC is vulnerable to harmonic interference, so it needs to be equipped with series reactors. By contrast, SVG is not affected by harmonics, yet it cannot mitigate harmonics.
 
Compensation Precision 
The SVC reactive power compensation device realizes graded regulation by controlling power capacitors, with a minimum compensation capacity of 5 kvar. The SVG reactive power compensation device, however, can achieve precise compensation down to 0.1 kvar.
 
 
In summary: SVG presents obvious advantages among the two reactive power compensation devices. Nevertheless, its high price makes it uneconomical for most enterprises. SVC is relatively low‑cost, and its performance is mainly determined by power capacitors.
 
The above is the comparison between SVC and SVG reactive power compensation devices compiled by Shanghai Kunyou Electric Co., Ltd. In our subsequent articles, Shanghai Kunyou Electric Co., Ltd. will elaborate on SVC, focusing on its major device types. Please stay tuned to our updates.