Harmonic Filtering and Reactive Power Compensation

Our SVC includes three types to meet the needs of different industries and sites: MCR, TSC, and TCR. The MCR type SVC adopts self coupled DC excitation and limit magnetic saturation working mode, which not only greatly reduces the generated harmonics, but also has low active power loss and fast response speed. By changing the triggering angle of the thyristor in the MCR excitation system, the saturation degree of the magnetic flux in the core of the magnetic control reactor can be altered, thereby changing the reactive power capacity output of the magnetic control reactor.

The MCR type SVC has extremely high reliability, maintenance free, and a service life of not less than 20 years. Important systems such as electrified railway traction power supply networks have been given priority for adoption; Capable of stable and reliable operation in any harsh power grid working environment (such as voltage waveform distortion, large amplitude fluctuations, etc.); It can directly operate in any voltage level power grid (6-500kV), and is easy to install (similar to ordinary transformers) and debug; The reactive power compensation capacity can be infinitely adjusted to achieve the best compensation effect.

SVG as a dynamic reactive power source, uses high-speed computing components such as DSP/IGBT, combined with ultra precision control programs, to track real-time changes in grid current, and increase the PF value to 0.99 within 15ms.
The widespread application of large capacity nonlinear loads and impulse loads such as power electronic equipment in transmission and distribution grids and industrial users has brought serious power quality problems. SVG can significantly improve the power quality at the connection point between loads and the public power grid, such as improving power factor, overcoming three-phase imbalance, eliminating voltage flicker and voltage fluctuations, and suppressing harmonic pollution.
The SVG dynamic reactive power compensation device produced by our company has advantages in response speed, stable grid voltage, reduced system losses, increased transmission force, improved transient voltage limit, reduced harmonics, and reduced footprint.The development of SVG relies on our company's strong technical strength, fully utilizing our comprehensive research, design, manufacturing, and testing capabilities. Our company has close academic connections and technical cooperation with well-known research institutions and electrical companies at home and abroad. We are willing to work together with our customers to improve the power quality of the power grid with advanced technology and high-quality products, and contribute to energy conservation, consumption reduction, and safe production in the power generation, supply, and consumption sectors.

Faced with the severe problem of power harmonic pollution, AHF is the most effective tool to improve power quality. AHF is a new specialized equipment for power harmonic control developed using modern power electronics technology and digital signal processing technology based on high-speed DSP processing devices. AHF is equivalent to a harmonic current generator, which tracks the harmonic components in the harmonic current and generates harmonic currents with equal amplitude and opposite phase.AHF consists of two parts: the instruction current operation circuit and the compensation current generation circuit. The instruction current operation circuit detects the current in the circuit in real time, converts the analog current signal into a digital signal, and sends it to a high-speed digital processor (DSP) for signal processing. The harmonic and fundamental currents are separated to obtain the instruction current, which is then sent to the compensation current generation circuit in the form of a pulse width modulation (PWM) signal through the current tracking control circuit and drive circuit. The IGBT and IPM power modules are driven to generate a compensation current with the same amplitude and opposite polarity as the harmonic current, which is injected into the power grid to compensate or cancel the harmonic current, actively eliminate power harmonics, and achieve dynamic, fast, and thorough processing of power harmonics.