Static Var Generator (SVG) is a self commutating bridge circuit composed of switchable high-power power electronic devices (IGBTs). It is connected in parallel to the power grid through reactors, and the amplitude and phase of the output voltage on the AC side of the bridge circuit are appropriately adjusted, or the AC side current is directly controlled to generate inductive or capacitive reactive power. As an active compensation device, SVG can not only track the impulse current of the impulse load, but also track and manage the 5th, 7th, 11th, and 13th characteristic harmonic currents. Static Var Generators are divided into two categories: non explosion-proof and explosion-proof.

Main uses of the product
▶ Improve power factor of the power grid, significantly reduce line current, save energy and reduce consumption
SVG can automatically compensate for reactive power based on the reactive power content in the power grid, maintaining the power factor above 0.95
▶ Increase the power supply voltage of end of grid equipment and maintain voltage stability
SVG can quickly support voltage and maintain the voltage of each load at the power supply end within a stable range, greatly reducing the harm of voltage fluctuations to power grid equipment.
▶ Eliminating harmonic pollution in the power grid
SVG can reduce the impact of harmonics on power supply systems and electrical equipment.
▶ Perfect compensation effect
SVG can dynamically compensate for reactive power in the power grid in real-time, keeping the power factor infinitely close to 1. Timely control of characteristic harmonics, protection of other electrical equipment from harmonic interference, greatly improving the quality of power grid.
operational principle
SVG utilizes switchable high-power power electronic devices (IGBTs) to form a self commutating bridge circuit, which is connected in parallel to the power grid through reactors. By appropriately adjusting the amplitude and phase of the output voltage on the AC side of the bridge circuit, or directly controlling its AC side current, the circuit can absorb or emit reactive current that meets the requirements, achieving the purpose of dynamic reactive power compensation.

The characteristics of SVG
▶  SVG can track and compensate for the reactive power of the compensated equipment, with good dynamic response performance.
SVG uses aluminum plate heat sinks and water-cooled heat dissipation to provide a good heat dissipation environment for high-power heating devices such as IGBTs inside, extending the service life of power devices and ensuring safe and reliable operation.
▶ Diversified compensation functions
It can independently and automatically compensate for reactive power, automatically compensate for terminal voltage, and manage harmonics.
▶ Adopting advanced control technology
The SVG control core adopts advanced high-speed processors with fast computing speed; Using a 16 bit high-precision AD sampling chip, the sampling accuracy is high, making it more accurate in calculating reactive power and providing superior dynamic tracking compensation performance.
▶ Multiple compensation methods
SVG can adopt various schemes such as centralized compensation, regional compensation, and on-site compensation based on the actual situation on site. In addition to single unit compensation, multiple units can also be used in parallel, and can be combined with reactive power compensation equipment in the higher-level power supply system to form a multi-level compensation network that covers the entire power supply system.
▶ Extremely low harmonic content
SVG adopts SPWM technology, three-level technology, and multiplexing technology, which not only generates extremely low harmonic content, but also compensates for the harmonics and reactive power of the load, and manages a certain amount of harmonics in the compensated power grid (25% for 5th, 7, 15% for 11th, and 13, respectively).
▶ Comprehensive software and hardware protection
Equipped with software and hardware protection for overcurrent, short circuit, overvoltage, undervoltage, phase loss, three-phase imbalance, communication interruption, fiber optic interruption, cooling fan failure, and IGBT overheating.

▶ Modular structural design
● Adopting a new multi-level inverter structure to achieve series connection of inverters and minimize setup
Reserve volume and increase power density;
The structure and electrical performance of the power unit are completely consistent, and the units can be interchanged, installed and maintained
Easy maintenance and low workload;
Small footprint, especially suitable for occasions with high requirements for footprint, and can be used for
Form a mobile device.
▶ High power adopts fully water-cooled technology
High pressure SVG adopts internal and external water isolation for heat dissipation, meeting the heat dissipation requirements. The water cooling system is in operation
Stable output of deionized water with constant temperature, pressure, and quantity, effectively cooling and heating semiconductor devices,
Our water cooling system has the following advantages in ensuring that the equipment operates within a suitable temperature range:
High heat dissipation efficiency and low long-term operating costs;
● Significant reduction in operating noise;
The key components and instruments are all international first tier brand products, ensuring the reliable operation of the system;
The main water pump and backup water pump rotate to extend their service life.
▶ Water cooling power unit
The power unit adopts an H-bridge cascade structure, effectively reducing the space required for unit layout.
The units are arranged vertically in a drawer style stack, and the drawers of the same phase unit are connected in series;
The unit cooling water pipes are connected in parallel to ensure uniform flow distribution;
The main heat source components are arranged on the surface of the radiator and can be adjusted by adjusting the cooling water flow rate,
Respond to different heat dissipation needs;
● Adopting a stacked busbar design, with small parasitic inductance and compact unit structure;
The inlet and outlet of the power unit are equipped with double shut-off quick connectors, which facilitate the replacement of the power unit;
Key components are all imported products from Germany, Japan, and other countries.

Technical advantages of SVG
SVG is a compensation device based on voltage source converters, achieving a qualitative leap in reactive power compensation methods. It no longer uses large capacity capacitors and inductors, but achieves the transformation of reactive energy through high-frequency switching of high-power power electronic devices. There are the following advantages:
● Faster response speed
● Wider operating range
Dynamic governance of harmonic characteristics in the power grid
● Humanized interface design, fully automatic intelligent control, and intelligent operation
Low self operating losses and good operational economy
● Real time self inspection, real-time recording, real-time detection and compensation
Stronger voltage fluctuation suppression ability
● Diversified compensation functions
Modular structural design with small footprint
Efficient heat dissipation system, water water heat exchange, heat pipe heat exchange
● Remote monitoring can be used to achieve unmanned operation
Standard water-saving electric valve, fully automatic control, saving external cooling water
Main functions of SVG
SVG is connected in parallel to the power grid, acting as a variable reactive current source. Its reactive current can quickly follow the changes in load reactive current, automatically compensating for the required reactive power of the system. The main functions of SVG are as follows:
▶ Reactive power compensation to improve power factor. Significantly reduce line current, save energy and reduce consumption.
SVG equipment can automatically detect the reactive power content in the power grid, automatically adjust and compensate for reactive power based on the reactive power content, and there will be no under compensation or over compensation, maintaining the power factor above 0.95.
▶ Voltage compensation function, improving the stability of power grid voltage and increasing the terminal power supply voltage
SVG can quickly support voltage and maintain the voltage of each load at the power transmission end within the required voltage range, greatly improving the stability of the power grid voltage and reducing the harm of voltage fluctuations to equipment in the power grid.

Q&A
① Is our PPH pipe self welded?
Yes, we have our own processing workshop, and currently all welding processes can be met. The company has also expanded the PPH pipe welding workshop this year.
② What is our welding method?
Hot melt socket welding, hot melt butt welding, socket welding, currently the welding part is relatively mature and has received good feedback in the industry!
③ How is our company's cooperation in the industry?
At present, our company is cooperating with Siemens, Hewang, and TBEA, while samples are being produced by companies such as Xinfengguang, Rongxin, and Hekang. Many customers are currently developing the SVG liquid cooling system, and the growth trend is also quite evident.
④ What is the share? What is our company's production capacity?
At present, our company has a relatively large share of supporting wind power and data centers. With balanced production and sales, the factory's expansion capacity will increase this year. We hope to receive your company's recognition and our company will actively cooperate with the sampling work.
⑤ We are currently a local supplier, and your company's logistics costs in Changzhou will be relatively high.
Now the logistics delivery is also relatively timely. We will prepare the goods for your company in advance and will not delay your normal operation!
⑥ Is your company able to provide free prototype products?
Our company can provide some welding samples for free. Regarding the prototype part, our company can make the first sample on site at your customer's site. For example, if there are no problems after testing for 3 months, your company can pay according to the contract.
⑦ How can your company ensure the appearance deformation and leakage of PPH pipes!
PPH pipes themselves have a certain degree of elasticity. During welding, we strictly control the alignment of the axis, the depth of welding insertion, and the switching time. Regarding leakage issues, our company conducts pressure testing on each pipe to ensure zero leakage points when leaving the factory.