High voltage automatic reactive power compensation device HLQB

Product Overview:

HLQBThe complete set of high-voltage parallel capacitors is mainly used for6KVThe10KVThe35KVWaiting for reactive power compensation in the power frequency system, improving power factor, enhancing voltage quality, reducing line losses, and fully utilizing the efficiency of power supply equipment. At present, the increase in reactive load current has caused losses in the power supply system,At present, most of China's distribution networks adopt the fixed capacitor bank reactive power compensation method in substations,Due to the lack of reactive power regulation methods,During peak and valley periods of power supply, there are significant fluctuations in power factor,There have been issues with over supplementation and under supplementation.HLQBThe complete set of high-voltage reactive power compensation automatic capacity adjustment device uses a reactive power automatic controller to detect the grid voltage and power factor. Through comprehensive judgment of the grid voltage and power factor, it can simultaneously control the automatic on load voltage adjustment of two main transformers and the automatic switching of reactive power compensation capacitors on two busbars, achieving balanced system voltage and providing power factor. Reduce line loss, protect power supply quality, and solve the problems of no fault compensation and under compensation.

Model Description

HLQB-6/10/35

Main technical parameters

Rated voltage10（6）kV

Rated frequency:50Hz

Rated capacity:100-10000kVar

Neutral point wiring method: Non effective grounding or neutral point insulation.

Usage conditions:

Installation location: Indoor/outdoors

◆ Environmental temperature:-20℃～+40℃

Relative humidity: ≤90％（25℃）

◆ Altitude: ≤1000rice

The installation site should be free from severe mechanical vibrations, harmful gases and vapors, and conductive or explosive dust

Working methods and characteristics

1The device mainly consists of high-voltage parallel capacitor banks, reactors, capacitor switching switches, vacuum contactors, current transformers, zinc oxide lightning arresters, reactive power compensation controllers, microcomputer protection units, etc.

2The device adopts advanced digital grouping method to encode capacitors of different capacities in binary form. Through automatic optimization combination, it can achieve the maximum number of capacitor groups and high-voltage vacuum switches to adjust the capacitance, without causing a significant increase in cost, and has a good performance price ratio. It can also be configured evenly and switched step by step according to user requirements.

3Spray type fuses are connected in series with capacitors, and when there is a partial series section inside the capacitor（50%—70%）When the breakdown occurs, the fuse will act to quickly disconnect the faulty capacitor from the capacitor bank, effectively preventing the fault from expanding.

4The discharge coil is connected in parallel in the capacitor circuit. When the capacitor bank is disconnected from the power supply, it can cause the residual voltage on the capacitor to drop from the peak rated voltage within five seconds50vbelow

5The series reactor is connected in series in the capacitor circuit to limit the high-order harmonics in the switching capacitor group and reduce the closing inrush current. The reactance rate of the series reactor is only suitable for limiting the inrush current0.1%—1%For harmonics that are limited to five or more times, choose4.5%—6%For suppressing harmonics above the third order, choose12%—13%

6.The structural design is reasonable, with good thermal and dynamic stability. The cabinet type live display device is mainly used to display the live status of the device, and has a program lock, observation window, and forced locking function; The outdoor equipment is fenced to ensure the safety of operation and maintenance personnel.

7.The external dimensions, color, and wiring method of the device can be designed according to user requirements

8.adoptHLQSCThe high-voltage reactive power compensation controller automatically controls the switching of capacitors, with a high degree of automation and complete functions of measurement, display, control, and communication. It can switch capacitor banks according to reactive power and automatically compensate for load reactive power without manual intervention. The power factor is0.95Above, it will automatically exit in case of external faults or power outages, and resume operation automatically after power transmission

9The device is allowed to operate at the power frequency1.1Long term operation at double rated voltage

10The device allows for effective values caused by overvoltage and high-order harmonics1.3Continuous operation under steady-state overcurrent of double rated current .