Foreword: SVG (Static Var Generator), that is, high-voltage static var generator, also known as advanced static var compensator ASVC (Advanced Static Var Compensator) or static compensator STATCOM (Static Compensator), SVG (static compensator) and The three-phase high-power voltage inverter is the core, and its output voltage is connected to the system through a reactor, and keeps the same frequency and phase as the system side voltage, and the output power is determined by adjusting the relationship between the output voltage amplitude and the system voltage amplitude The nature and capacity of , when its amplitude is greater than the voltage amplitude of the system side, it will output capacitive reactive power, and when it is smaller than that, it will output inductive reactive power. It refers specifically to the device for dynamic reactive power compensation by self-commutated power semiconductor bridge converters.
So what is the scope of application of SVG (static compensator)?
First of all, the most commonly used SVG (static compensator) is mostly used in the independent power grid system of industrial users. Because the relevant departments of the country, such as the power supply department, will control the power factor and power quality of these industrial users. There are many constraints and limitations. That means especially those for industrial users. Power consumption is very high. Users need to use SVG (Static Compensator) for in-situ reactive power compensation. On the one hand, it can reduce its own power consumption and achieve the purpose of energy saving and emission reduction, on the other hand. Able to reach the power supply sector to the industry. given. Power factor and power quality requirements.
SVG (static compensator) is best at solving problems caused by power factor, voltage deviation, voltage fluctuation and flicker. So SVG (static compensator) can be solved perfectly. Reactive power compensation behavior of wind power plants. Especially with other electrical equipment such as capacitors and reactors. With the use of. It can make the cost of the integrated reactive power compensation system lower. At the same time, due to the small size of the SVG (Static Compensator), it has good durability. There is little need for human supervision, which also allows wind farms to be built wherever they are. Simultaneous construction of SVG (Static Compensator).
For those harmonic sources that cause large content and high-order harmonics, for example. Reactive shocks often occur in industrial electrical systems. The resulting Gaussian slope and side level will be the grid voltage. produce distorted waveforms. Since SVG (static compensator) itself is not a source of harmonics. at the same time. It has the functions of compensating reactive power factor and eliminating absorbed harmonics.
At the same time, SVG (static compensator) is also suitable for those places where electrical equipment will cause unbalanced three-phase. The unbalanced three-phase power grid will generate higher harmonics and negative sequence currents. Make the voltage distortion more complicated. Will cause voltage fluctuations and flicker. SVG (Static Compensator). Has a very fast response speed. The system response is less than 5ms, and it can not only provide stable grid voltage like electrical equipment. and reactive current. At the same time, it can also eliminate three-phase imbalance by using its own sub-item compensation function. Improve the utilization of equipment such as traction transformers, and at the same time suppress low-frequency oscillations in the system.
SVG (static compensator) adopts multiple or PWM technology to greatly reduce the content of harmonics in the compensation current, and its volume and cost are much smaller than the common traditional condensers, capacitor reactors, and thyristor-controlled reactors TCR. Represents the traditional SVC and so on. SVG static compensator is the future development trend.
Post time: Apr-13-2023