High-Voltage Series Static Var Generator (SVG)
Short Description:
The SVG high-voltage chain-type static reactive power generator represents the latest technology in the field of reactive power compensation. When connected in parallel to the power grid, the SVG acts like a variable reactive current source, with its reactive current able to quickly track changes in the load and automatically compensate for the reactive power required by the system. The SVG has a fast response speed and is also known as a Static Synchronous Compensator, abbreviated as STATCOM.
Product details
Product Overview
SVG high-voltage chain stationary reactive power generator is a representative of today's reactive power compensation field technology, SVG is connected in parallel in the power grid, equivalent to a variable reactive current source, its reactive current can quickly track the change of load and change, automatically compensate the reactive power required by the system, SVG response speed is fast, also known as static synchronous compensator abbreviated as STATCOM. Compared with traditional SVC devices represented by TCR, the stationary reactive power generator (SVG) has a faster regulation speed, a wide operating range, and greatly reduces the content of carrier frequency harmonics in the compensation current after the use of multiplexing, multi-voltage and other PWM technical measures. What's more, SVGs use reactors and capacitors that are much smaller than those used in SVCs, which will significantly reduce the size of the device. The Kanrun series high-voltage stationary reactive power generator SVG has such characteristics, representing the development direction of dynamic reactive power compensation devices.
Rationale
The basic principle of SVG is to use high-power power electronic devices such as (IGBT) that can be shut down to form a self-commutating bridge circuit, and appropriately adjust the amplitude and phase of the output voltage on the AC side of the bridge circuit through the reactor in parallel on the power grid, or directly control its AC side current, so that the circuit can absorb or emit reactive current that meets the requirements to achieve the purpose of dynamic compensation. SVG can emit both inductive and capacitive reactive power within its rated compensation range, which is equivalent to a continuously dynamically adjustable inductance or capacitor.
Technical characteristics
Fast response speed and low average loss
SVG response time: ≤5ms, traditional reactive power compensation device response time: ≥20ms.
The average loss ≤ 0.7%, which is low in the same industry in China.
Maintenance-free equipment
Modular design, the structure and electrical performance of the power unit are consistent, and the units are interchangeable.
It is easy to install, set and debug, and simple to operate.
High control accuracy and small footprint
The control accuracy is high at 0.005 degrees and the control resolution is 0.7%, which is better than other manufacturers.
Since there is no need for a large number of passive devices such as reactors and capacitors, the size and footprint of the compensation device and the footprint are reduced. It is only 1/3 to 1/2 of the same capacity SVC.
Good low voltage characteristics
SVG has the characteristics of a current source, and its output current can not be affected by the bus voltage, so that the system has a strong low voltage ride-through ability.
Technical characteristics:
Fast response speed and low average loss
SVG response time: ≤5ms, traditional reactive power compensation device response time: ≥20ms.
The average loss ≤ 0.7%, which is low in the same industry in China.
Maintenance-free equipment
Modular design, the structure and electrical performance of the power unit are consistent, and the units are interchangeable.
It is easy to install, set and debug, and simple to operate.
High control accuracy and small footprint
The control accuracy is high at 0.005 degrees and the control resolution is 0.7%, which is better than other manufacturers.
Since there is no need for a large number of passive devices such as reactors and capacitors, the size and footprint of the compensation device and the footprint are reduced. It is only 1/3 to 1/2 of the same capacity SVC.
Good low voltage characteristics
SVG has the characteristics of a current source, and its output current can not be affected by the bus voltage, so that the system has a strong low voltage ride-through ability.
