SVG 3-35KV 1-100Mvar high voltage static reactive power compensation device

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Product Description

SVG is a static var compensator, which is a representative product of technical application in the field of reactive power compensation. TDSVG is connected in parallel with the power grid, which is equivalent to a variable reactive current source. By adjusting the amplitude and phase of the output voltage on the AC side of the inverter, or directly controlling the amplitude and phase of its AC current measurement, it can quickly absorb or emit all The required reactive power can achieve the purpose of fast and dynamic adjustment of reactive power. When direct current control is adopted, not only can the inrush current of the impulse load be tracked and compensated, but also the harmonic current can be tracked and compensated. Using power electronic inverter technology to generate a current that is equal to and opposite to the object being compensated, cancels each other out, and the power factor can be close to 1.

Model Description

Technical parameters and structure dimensions

(1) Rated working voltage: 6kV, 10kV, 35kV;
(2) Rated capacity: soil 0.5- soil 5Mvar;
(3) Output reactive power range: continuous full range adjustment from inductive rated reactive power to capacitive rated reactive power range;
(4) Controller response time: <: 1ms;
(5) Total harmonic distortion rate of output voltage (before grid connection): <:4%;
(6) Total harmonic distortion rate of output voltage (after grid connection): <:3%;
(7) Output current total harmonic distortion THD: <3%;
(8) Output voltage asymmetry: <3%;
(9) Efficiency: >98%;
(10) Operating temperature: -20O℃- +40℃;
(11) Storage temperature: -40℃- +65℃;
(12) Relative humidity: the monthly average is not more than 90% (25°C), no condensation;
(13) Altitude: <5000m;
(14) Earthquake intensity: 8 degrees.

工作原理2

Product features

(1) It has anti-harmonic function to ensure the safety of the system. TDSVG is a controllable current source, which only compensates the fundamental reactive current, and the harmonic current of the system will not cause damage to the compensation equipment, prolonging its life and reducing maintenance workload. At the same time, avoid the harmonic amplification that may be caused by the capacitor bank of the series reactionance, and prevent other equipment and compensation equipment in the system from being damaged due to harmonic overvoltage;
(2) Dynamic continuous smooth compensation, higher response speed makes the compensation effect for voltage flicker better. TDSVG can follow the load changes, dynamically and continuously compensate the power factor, can generate reactive power, and can absorb reactive power, completely eliminating the situation of reactive power backward;
(3) It can solve the problem of unbalanced load;
(4) Not only does not generate harmonics, but also can dynamically compensate for harmonics while compensating reactive power;
(5) Current source characteristics, the output reactive current is not affected by the bus voltage, including impedance type characteristics, the output current decreases linearly with the bus voltage;
(6) There is no transient impact, no closing inrush current, no arc re-ignition during switching, and it can be switched again without discharge;
(7) Small maintenance and low operating cost;
(8) Easy to install, set and debug, and the interface is clear and clear.

Product application and advantages

Typical Applications
SVG have many low and high voltage potential applications where their use offers many benefits.
⦿ Installations with fast changing reactive power demand like electric arc furnaces and ball mills.
⦿ Highly dynamic loads where the power factor fluctuates rapidly or in big steps like cranes, sawmill machinery, welding machines, etc.
⦿ Correction of leading power factor like in data centers allowing back-up generators operation.
⦿ UPC systems.
⦿ Solar inverters and wind turbine generators.
⦿ Railway electrification systems: Trains & trams
⦿ Loads with low power factor: Motors, cables, lightly loaded transformers, lighting, etc.
Static Var Generators (SVG) Benefits:
1. Capability to deliver instantaneous capacitive and inductive reactive power compensation.
2. Optimized for highly dynamic applications where conventional capacitor banks or reactor banks are unable to track the loads.
3. Allow compensation of loads fed by generators without risk of overcompensation.
4. Inject reactive power that is required by the load at each instant into the system.
5. Over dimensioning not necessary: Compensation capacity equals the installed capacity.
6. Unaffected by network voltage drop. Full reactive current can be provided to meet required demand under reduced network voltage level.