1. Product Overview
Static Var Generator (SVG) is widely used in high-voltage AC/DC transmission and transformation systems, as well as industrial and transportation distribution networks such as metallurgy and electrified railways. Its main function is to improve the operating conditions of the power supply and distribution network, enhance the reliability of the transmission and distribution system, suppress system voltage fluctuations, reduce pollution caused by harmonic currents on the power grid, and improve the power factor of the system.
The existence of reactive power poses various problems and challenges to power transmission and distribution systems and heavy industry applications. Power transmission and distribution face problems such as voltage fluctuations, low power factor, and voltage instability; Heavy industrial applications, especially fast and impulsive loads, may lead to power quality issues such as voltage imbalance, voltage fluctuations, and flicker in the power supply network. Dynamic reactive power compensation can solve these problems
2. Working principle
The basic principle of SVG is to connect a Voltage Source Converter (VSC) in parallel with a reactor or transformer on the power grid. 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 the AC side current, the required reactive power can be quickly absorbed or emitted, achieving the goal of quickly and dynamically adjusting reactive power. When using direct current control, directly controlling the AC side current can not only track and compensate for the impulse current of the load, but also track and compensate for the harmonic current.
Consider the system as a voltage source, SVG as a controllable voltage source, and transformer as an equivalent connected reactor. Composed of LCD touch screen, control unit, VSC inverter, DC power supply, connecting reactor, circuit breaker and other auxiliary devices.
4. Functional characteristics of the device
As a dynamic Snoan technology, KH-LSVG has the following technical characteristics:
Real time tracking and dynamic compensation
◆ Multi functional, while addressing multiple power quality issues
Power unit modular design
◆ DSP intelligent control
◆ Small size and light weight
◆ Comprehensive protection and diagnosis
The existence of reactive power poses various problems and challenges to power transmission and distribution systems and heavy industry applications. Power transmission and distribution face problems such as voltage fluctuations, low power factor, and voltage instability; Heavy industrial applications, especially fast and impulsive loads, may lead to power quality issues such as voltage imbalance, voltage fluctuations, and flicker in the power supply network. Dynamic reactive power compensation can solve these problems. Application areas: Office buildings, commercial buildings; Schools and hospitals; Mobile communication; Residential buildings; The calculation information center is suitable for industrial loads: automotive manufacturing; Rail transit; Intermediate frequency furnace and electric arc furnace; Chemistry and pharmaceuticals; Power electronics; Paper making and printing, etc.