Supply DEHVC high voltage intelligent reactive power compensation device

The high-voltage intelligent reactive power compensation device is suitable for automatic compensation of the power factor of equal and high-voltage distribution systems, and is a device that automatically adjusts voltage and reactive power according to the power grid and load conditions. The compensation capacity can be flexibly designed according to user requirements, using components with excellent performance (capacitors, reactors, vacuum switches, discharge coil controllers, etc.). Each circuit is equipped with reactors with different reactance rates, which can effectively limit the closing inrush current and protect the Vacuum switches and capacitors under frequent switching conditions can also suppress harmonics. The system uses advanced reactive power compensation controller, human-machine interface menu-based operation, real-time online monitoring of the reactive power and power factor of the control system, and achieves the best compensation effect with the minimum number of switching times. It also has an R communication interface and uses the standard B protocol to network with the substation's comprehensive automated dispatch terminal to achieve four remote functions and achieve unattended operation.
Technical Featuresrr
Capacitor banks are automatically switched according to the voltage and reactive power factor, and can realize hierarchical and multi-level switching, making the compensation more accurate and meeting the desired requirements.
The advanced twelve-area diagram fuzzy control principle is adopted to ensure that the device has the highest accuracy in regulating the reactive power of the substation voltage and the minimum number of switching times of the capacitor, achieving on-site balance of the reactive power of the grid and reducing grid losses. Improve voltage qualification rate.
Diverse control methods: Five control methods to choose from (switching time, voltage switching, power factor reactive power switching, voltage switching according to time period switching voltage), settings can be selected and controlled according to the characteristics and requirements of the power grid. More scientific.
The capacitor takes into account the voltage regulation combined with the on-load splitting head voltage regulation method of the regulating transformer to stabilize the system voltage.
Automatically recognizes and displays the pressure regulating switch gear information, and has protection functions such as sliding gear reverse alarm locking and other protection functions.
It can display the main transformer low-voltage side voltage, current, power factor and capacitor switching status in real time.
It has R communication interface and adopts standard B protocol to connect to the substation comprehensive automatic dispatch terminal to achieve four remote functions and realize unattended operation.
Protection function: It has overvoltage, undervoltage, overcurrent, rapid interruption, three-phase current imbalance (phase loss) discharge protection, motion blocking protection, and can group protection for dynamic compensation capacitor banks.
Completely automatically compensates for load reactive power, improves load power factor, and increases transformer load capacity.
Large LCD screen display, recording and reading data more directly, and good human-machine dialogue function.
Fault records, contactor action records.
Dimension R units can be interchanged, and the modular ones can be inspected separately without affecting each other.

High power density: the impedance and volume of the connected reactor are smaller, and the valve group is small in size.
Wide operating range: The reactive current provided by the device has nothing to do with the bus voltage. When the bus voltage decreases, it operates in a constant current source state and has strong reactive power compensation capabilities. The reactive power compensation capability of a device with the same capacity is equivalent to ~ times that of a device with the same capacity.
Flexible control method: various control strategies such as constant reactive power or constant voltage control, three-phase balance control or split-phase control can be used.
Working Principle rr
The rr-type high-voltage intelligent reactive power compensation device uses the traditional switching capacitor method to inject capacitive current into the system to compensate for reactive power and adjust the power factor. Its core components mainly include controllers, high-voltage vacuum contactors, capacitors, reactors and protection devices. The control system samples and analyzes the system voltage and current signals, uses the power factor and system voltage as control parameters to determine and output control instructions, and controls the action of the contactor to switch the capacitor bank so that the system power factor is controlled within the set range. .
Scope of application
This product is suitable for distribution systems where the power factor of the power system is relatively stable and does not fluctuate frequently at low loads. It can improve the power factor and improve the utilization rate of electric energy. It is widely used in industrial fields such as machinery manufacturing, metallurgy, mining, transportation, energy, and communications.