12/12/2019 at 6:39 pm #29183astao211Participant
SVC Static Var Compensator
SVC Static Var Compensator-SVC is a typical FACTS device classified as dynamic reactive power compensation product and has the fastest response rate of 10ms. It is a more mature technology among high-voltage reactive compensation solutions, which responds the fastest and provides various advantages like continuous stepless adjustment with no inrush current or arc discharge and no service life limits for the mechanical switch.
Scope of application: SVC Static Var Compensator-SVC can be directly connected to the 6～35kV voltage level power system; can be widely applied to the power quality control of power system, petrochemical, metallurgy, steel, railway electrification, wind power, coal and other industries.
SVG is the most advanced reactive power compensation technology. Its compensation device based on voltage source converter realizes the qualitative leap of reactive power compensation. Instead of using large-capacity capacitors and inductive devices, it uses a high-frequency switch of high-power power electronics to achieve a non-functional conversion. Technically, SVG has the following advantages over traditional reactive power compensation devices:
(1) Faster response time SVG response time: <5ms. Traditional dynamic compensation device response time: ≥ 10ms. SVG can convert from rated capacitive reactive power to rated inductive reactive power in a very short time. This unparalleled response speed is fully capable of compensating for impact loads.
(2) Stronger ability to suppress voltage flicker The traditional motion compensation can suppress voltage flicker up to 2:1, and SVG can suppress voltage flicker by 5:1 or even higher. In addition, due to the extremely fast response of the SVG, increasing the device capacity can continue to increase the ability to suppress voltage flicker.
(3) Wide operating range SVG can operate in the range from rated sensitivity to rated capacitance, so it is much wider than other types of dynamic compensation. More importantly, when the system voltage becomes low, SVG can also output reactive current close to the rated condition. Other types of dynamic compensation rely on capacitors to provide capacitive reactive power. The reactive current of the output is proportional to the grid voltage. The lower the grid voltage, the lower the reactive current of the output, so the compensation capacity of the grid is also changed accordingly. weak. This is an essential shortcoming of other types of dynamic compensation techniques.
China Power Electronic Equipment
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