PIJKW intelligent reactive power Compensation Controller

The PIJKW multi-functional reactive power compensation controller adopts a 32-bit ultra-strong anti-interference ARM and an internal and external dual "watchdog" design to prevent overcompensation or no compensation caused by system crashes, ensuring extremely high reliability.

The controller adopts reactive power or power factor as the control physical quantity, reactive power trend prediction and delayed multi-point sampling technology, effectively avoiding switching oscillation. It is equipped with functions such as overvoltage, undervoltage, phase loss protection, harmonic monitoring, low current protection, and over-temperature protection. Once the warning value is exceeded, the capacitor will be quickly cut off. It is equipped with a data communication interface and adopts a plug-and-play method to meet different communication requirements.

The product can be controlled for three-phase common compensation or for independent sampling of three-phase loads, achieving the function of phase-by-phase compensation control for unbalanced three-phase loads in the power grid. The product can lock control when the power grid is under low load and quickly cut off the capacitors in operation, effectively preventing overcompensation caused by load drops.

All of our company's series of controllers have been tested in the market for many years and have been constantly innovated and improved, thus well meeting the requirements of modern power grids for reactive power compensation control. Users can select controllers of corresponding specifications according to the requirements of different usage scenarios to meet the specific functional requirements.

The low-voltage reactive power compensation controller has passed the voluntary CQC certification of the National Quality Certification Center and complies with the standard: JB/T 9663-2013.

The low-voltage reactive power compensation controller has obtained the EMC electromagnetic compatibility test report and certificate for automation equipment from State Grid Corporation of China.

The low-voltage reactive power compensation controller has passed the inspection of the "Electric Power Industry Reactive Power Compensation Complete Set Equipment Quality Inspection and Testing Center", and complies with the standard: DL/T 597-1996.

mechanical parameter

Sampling and measurement function

Three-phase voltage of distribution network, three-phase current of incoming line cabinet, three-phase power factor, three-phase four-quadrant active power, three-phase four-quadrant reactive power;

◆ Amplitudes of 3rd to 19th harmonics of three-phase voltage in distribution network, total harmonic distortion rate of three-phase voltage;

The amplitudes of the 3rd to 19th harmonics of the three-phase current in the distribution network and the total harmonic distortion rate of the three-phase current;

◆ Three-phase capacitor cabinet current and total current distortion rate;

◆ Distribution network frequency, ambient temperature, etc.

Parameter display function

◆ Large-screen dot matrix LCD liquid crystal, high-brightness LED backlight, low power consumption and high definition;

◆ Displayed in Chinese (English), parameters are clear at a glance;

In the screen saver state, each parameter is automatically displayed in rotation without the need for key query, which is convenient and intuitive.

The panel uses dual-color LED to display the capacitor status, and all the statuses of intelligent capacitors such as on/off/fault are fully displayed.

Parameter setting function

◆ Setting of protection Settings such as overvoltage value, undervoltage value, over-temperature value, and harmonic threshold;

◆ Settings of switching limits such as delay time, input threshold, cut-off threshold, upper and lower limits of power factor, etc.

◆ Setting of the transformation ratio of current and voltage transformers;

◆ Settings of communication parameters such as communication address and baud rate.

Control function

◆ Manual and automatic control can be switched conveniently;

Control the switching of capacitors based on the measured parameters of each power grid.

When the power factor is lower than the input threshold, the corresponding capacitor is input according to the reactive power value. When the power factor is higher than the cut-off threshold, the corresponding capacitor is disconnected.

Capacitors of the same capacity are cyclically switched, and capacitors of different capacities are switched according to the codes to improve the compensation accuracy.

Protective function

◆ Voltage over-limit protection: When the system voltage exceeds the set upper or lower limit values, an overvoltage or undervoltage fault will be reported, and the capacitor will be quickly disconnected and locked for control

◆ Harmonic over-limit protection. When the harmonic protection set value is exceeded, the capacitor is quickly disconnected and lockout control is carried out.

◆ Temperature over-limit protection: When the ambient temperature exceeds the set temperature threshold, the capacitor is quickly disconnected and locked for control.

◆ Low-load protection: When the transformer load is measured to be less than 4%, the capacitor is disconnected and the lock control is implemented to prevent overcompensation and faulty operation.

Signal function

◆ Signal display of the operation and shutdown status of each capacitor;

◆ Capacity signal display of each capacitor;

◆ Distribution parameter over-limit signal (overvoltage, undervoltage, etc.) display;

Communication function

◆ RS-485 communicates and exchanges data with intelligent capacitors, composite switches, etc.

◆ RS-485 can communicate with DTU or the upper computer, and is available for meter reading and parameter setting.

◆ GPRS remote data communication, enabling remote management;

• Wiring schematic diagram

Terminal block diagram

Wiring schematic diagram