The main circuit of the complete set of active power filter device is an IGBT power converter, which adopts the detection technology of instantaneous reactive power theory to automatically track the harmonic changes of the power grid, and has a high degree of controllability and rapid response. It overcomes the shortcomings of poor filtering effect of traditional passive filtering devices, prone to resonance, and can only compensate for fixed sub-harmonics, and can play a good filtering and compensation effect on various fast transient impact loads.

The active power filter detects the load current in real time through the external current transformer CT, extracts the harmonic component of the load current through the internal DSP calculation, and then sends the PWM signal to the internal IGBT to control the inverter to generate a current with the same size and opposite direction as the load harmonic, and injects it into the power grid to compensate the harmonic current, so as to realize the filtering function.

Zysvg static var generator detects the load current in real time through the external current transformer CT, and analyzes the reactive power content of the load current through the internal DSP calculation, and then controls the PWM signal generator to send the control signal to the internal IGBT according to the set value, so that the inverter can generate the required reactive power compensation current, and finally realizes the purpose of dynamic reactive power compensation.

The centralized detection system realizes the functions of real-time detection and operation analysis of the governance situation of each governance point, centralized monitoring and management of the working situation of the equipment module, fault warning and alarm, etc. Graphic monitoring: the monitoring function of power grid side, load side and compensation electrical parameters, temperature parameters, state parameters and fault conditions of equipment can be realized by graphical interface. Alarm: to realize the control point electrical parameters and equipment temperature over limit warning, equipment fault alarm management, alarm mode includes: screen prompt, fault screen push, SMS, alarm record can be queried, fault can be tracked.

Svg series high-voltage dynamic reactive power compensation device is a reactive power compensation system with IGBT as the core, which can provide capacitive or inductive reactive power quickly and continuously, realize constant reactive power, constant voltage and constant power factor control at assessment point, and ensure stable, efficient and excellent operation of power system. In the distribution network, the installation of SVG products with small and medium capacity in some special loads (such as electric arc furnace) can significantly improve the power quality at the connection point between load and public power grid, such as improving power factor, balancing three-phase voltage, restraining voltage flicker and voltage fluctuation, and controlling harmonic pollution.

Zydvr real-time control dynamic voltage regulator uses super capacitor and lithium electronic battery as energy storage elements. It adopts advanced electronic energy transformation technology and digital control technology to provide back type short-term energy storage solution, effectively manages voltage sag, voltage rise, short-time interruption and other problems, and has the characteristics of strong stability, good reliability and high efficiency.