Site conditions
The site is located in Hangzhou Asian Games Village.The project has more than 20 power distribution rooms. Due to the main load being fire-fighting facilities, which are generally not started, the transformers almost all operate without load, and the cable length is long, resulting in capacitive reactive power at both the high and low voltage sides, which cannot be compensated by the capacitor. Therefore, the power factor is low (0.2-0.5), and there is a risk of fines.
Solutions
According to the on-site situation analysis, it is recommended to install SVG on the low-voltage side for reactive compensation. SVG compensates capacitive/inductive reactive power generated by the load in real time by sampling low-voltage side current data.
At the same time, for the reactive power generated by transformers and cables, we can set a reactive power correction amount for SVG to compensate for the reactive power generated by transformers and cables while compensating for the reactive power on the low-voltage side. After calculation, the reactive power generated by the transformer is around 20kvar. Therefore, it is recommended to configure a 100kvar SVG module to compensate for the reactive power of the load while also taking into account the reactive power compensation of the transformer and cable.
Due to the existing reactive compensation capacitor cabinet on site, attention must be paid to the installation location of the primary line access point and the transformer during the installation of SVG to ensure that the SVG and capacitor cabinet can work in coordination. Due to the fast response speed of SVG, the sampling of SVG must include the current of the capacitor cabinet, and the sampling of the capacitor cabinet cannot include the current of SVG. Please refer to the following figure for specific wiring.
YTPQC-SVG
SVG (Static Var Generator) is a type of power electronic device used to compensate for reactive power in a power system. It works by generating or absorbing reactive power, depending on the needs of the system. The SVG can be used to compensate for both capacitive and inductive reactive power, but it is most commonly used to compensate for capacitive reactive power. This is because capacitive loads tend to draw more current than inductive loads, resulting in an increase in the total reactive power demand. By using an SVG, the amount of capacitive reactive power can be reduced, allowing the system to operate more efficiently and reducing losses.
Any technical inquiry about Static Var Generator(SVG) or Active Harmonic Filter(AHF), contact with us [email protected]
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