High voltage reactive power compensation device sold directly from the manufacturer

Basic Introduction to High Voltage Reactive Power Compensation Local Compensation Device

A complete set of parallel capacitors installed on the 6-35kV side to improve power factor in substations of 35kV and below in AC power systems with a frequency of 50Hz.

The device mainly consists of high-voltage parallel capacitors, isolation switches, discharge coils, zinc oxide lightning arresters, series reactors, pillar porcelain bottles, connecting busbars, cabinets or installation frames, and fences.

　　High voltage reactive power compensation on-site compensation devicePurpose and Scope of Application

This device is used to improve the power factor of the power grid, compensate for reactive power in the power grid, and improve the quality of power supply in the power grid.

This device is a complete set of combined equipment, especially suitable for occasions that require a small footprint. It has the characteristics of easy and convenient installation, operation, and maintenance.

This device is an indoor product, installed in an area with an altitude not exceeding 2000m, and the ambient air temperature is -25/B. The installation environment should not contain gases and vapors that are severely corrosive to metals, there should be no severe vibration, and there should be no explosive or flammable hazardous materials.

　　High voltage reactive power compensation on-site compensation deviceMain specifications and technical parameters

The rated voltage of this device is 6kV, and the total capacity of the three-phase capacitors is □□□ kvar. The capacitance deviation of the unit capacitor shall not exceed (0~+5)% of the rated value, and the capacitance deviation between the three phases shall not exceed 2%.

This device mainly consists of isolation switches, high-voltage parallel capacitors, series iron core reactors, discharge coils, zinc oxide lightning arresters, secondary control and protection circuits, and cabinets.

The model of the unit capacitor is SKE5-042-255I oil immersed full film capacitor.

The model of the series iron core reactor is CKSC-41.04/6.6-6 dry-type iron core reactor.

The discharge device uses FDG2-1.7/6.6/√ 3-1 type dedicated discharge coils to reduce the residual voltage of the capacitor from √ 2 Un to 50V or below within 5 seconds.

　　protect

The complete set of equipment is equipped with open delta voltage protection, with a protection setting value of 8.5V and a setting delay of 0.2S. The PT transformation ratio calculated above is 6.6/√ 3:0.1/√ 3.

Neutral point unbalanced current protection serves as internal fault protection for capacitors The capacitor bank is connected in a double star configuration, and the set voltage for the voltage relay is 8.5V. When the internal fuse is damaged and the current of the faulty component reaches 1.15 times the rated value, the current relay voltage reaches the set value and the circuit breaker trips after a delay of 0.2 seconds.

This device requires users to install overcurrent protection and short-circuit quick break protection on the circuit breaker introduced into this device, and overvoltage protection and undervoltage protection on the main busbar.

　　Installation and commissioning of on-site compensation device for high-voltage reactive power compensation

After receiving this device, users should first conduct a visual inspection, and then carry out acceptance according to the technical requirements of each supporting component.

When installing the capacitor cabinet, the cabinet base should be welded to the base or connected with anchor bolts.

Electromagnetic locking operation instructions

At the moment when the three-phase circuit breaker loses power, the yellow, green, and red indicator lights of A, B, and C phases on the high-voltage live display device all turn from on to off. At this time, the indicator lights of the operating circuit turn from off to on. Only in this case can the door be opened for maintenance.

The electromagnetic lock circuit needs to be connected to the auxiliary contact of the higher-level circuit breaker. Only when the higher-level circuit breaker is disconnected can the electromagnetic lock be powered on. When opening the door, press and hold the door electromagnetic lock button, insert the key and turn it into place. At this time, the door can be opened with just a gentle pull.

After opening the door, if replacing the capacitor, be sure to perform short-circuit discharge again.

After completion, make sure to lock all cabinets when the circuit breaker is powered off.

　　Operation, maintenance, upkeep, and troubleshooting

The inspection of the capacitor cabinet shall not be less than once a day, and attention should be paid to whether the signal relay on the capacitor cabinet has a dropped tag display during the inspection.

Observe and record the readings of current and voltage on the controller.

After the vacuum circuit breaker trips, the capacitor should be manually discharged, and the neutral point should be grounded. Then, the protection action should be checked and analyzed. After identifying the cause and handling it, the grounding wire should be disconnected before closing again.