KRTBB-10G High-Voltage Reactive Power Compensation Device
Short Description:
In recent years, with the popularization of computer application technology and the improvement of power technology levels, some power departments and research institutes have successively developed and designed automatic switching devices for 10 kV busbar compensation capacitors. These devices comprehensively consider the adjustment of substation main transformer taps along with capacitor switching, ensuring both voltage compliance and large capacitor engagement. The device is mainly used in 110 kV power systems, capable of achieving dynamic reactive power compensation, improving power factor, stabilizing voltage, and filtering harmonics to enhance the power quality of the grid. Currently, these devices are widely applied in power electronics, coal, electrified railways, metallurgy, chemical industry, photovoltaics, wind power, and other fields, with significant energy-saving effects.
Product details
Product Overview:
In recent years, with the popularization of computer application technology and the improvement of the level of power technology, some power departments and scientific research institutes have successively developed and developed automatic switching devices for 10 kilovolt bus compensation capacitors, that is, the adjustment of the main transformer tap of the substation and the capacitor switching are comprehensively considered, which not only ensures the voltage qualification rate, but also ensures the large investment of capacitors. The device is mainly used in 110k power system, which can realize reactive power dynamic compensation, improve the power factor, stabilize the voltage, and filter out harmonics at the same time to improve the power quality of the power grid. At present, the device is widely used in power electronics, coal, electrified railways, metallurgy, chemical industry, photovoltaic, wind power, and other fields, and the power-saving effect is very obvious.
How it works:
LNG type magnetron reactor type dynamic reactive power compensation and harmonic control device is mainly composed of compensation filter capacitor and magnetron reactor. The principle is to automatically adjust the thyristor control angle of the magnetron reactor according to the automatic controller to sample the reactive power of the system, change the permeability of the magnetron reactor, and make the reactance value of the magnetron reactor continuously adjustable, so as to achieve smooth compensation of the system's reactive power.
The device is connected to the system, the capacitor can provide a fixed capacitive reactive power, through the current of the magnetron reactor determines the inductive reactive power value output from the magnetron reactor, the inductive reactive power and capacitive reactive power offset, with the characteristics of fast response and high reliability, to ensure that the power factor is stable at 0.95 and above. The voltage fluctuates almost non-volatility.
Advantages of the scheme
(1) The device has the advantages of small self-loss (about 1% of the magnetron reactor), high reliability, small footprint, low manufacturing and maintenance costs, and small harmonics. The magnetron reactor has no moving elements inside and will not cause an impact on the system.
(2) The device is stepless adjustment, which can realize continuous compensation of reactive power.
(3) The device can not only effectively filter out harmonics, but also achieve good compensation effect.
(4) The response speed of the device is 20ms-100ms, which can track the load change in time and the compensation effect is good. Magnetron reactors are maintenance-free, which can save later maintenance costs.
(5) The combination of magnetron reactor and capacitor provides continuously adjustable reactive power, so as to control the voltage and reactive power more precisely, and the power factor can be kept constant, and achieve a good voltage qualification rate and low network loss. <
(6) Magnetron reactors truly realize: reliable structure, simple manufacturing process, product performance, low cost and other excellent technical and economic indicators, which solve the current problems of high cost, low production efficiency, temperature rise, high noise, and difficulty in application in actual production.
Ordering instructions
The following relevant parameters and technical requirements are required when ordering:
System voltage rating
Rated capacity
Number of groups
The main change is the number of stations
Pressure regulation method
System harmonic background
Communication mode
Installation method and installation location
Usage environment
Functional features:
●It can realize the comprehensive automatic control of voltage and reactive power or the individual automatic control function.
● It can automatically judge various operation modes of substations.
●Pressure regulation function: The pressure regulation gear information can be displayed through BCD code or one-to-one correspondence, with synchronous adjustment and anti-slip gear functions.
●Configure series reactors with appropriate reactance according to the harmonic content of the system or customer requirements to suppress the closing inrush current and suppress the influence of harmonics on the operation of the capacitor.
●Protection function: Equipped with a special microcomputer protection unit for capacitor banks, it can realize overvoltage, low voltage, two-stage overcurrent, zero-sequence voltage, differential current and other protection.
● Automatic discharge: Each group is equipped with a discharge coil to ensure that the remaining voltage of the capacitor bank is reduced to less than 50V within 5S of capacitor power off.
●Recording function: 50 operation records and accident information can be recorded separately.
●Statistics function: It can count the number of actions of voltage regulating taps and capacitor bank switches.
●Alarm function: It has PT disconnection, overvoltage, low voltage, main transformer overcurrent, transformer body and on-load voltage regulator switch light gas alarm protection function.
●Communication function: RS232, 485, 422 communication interface to realize communication with the central monitoring station, to realize the "four remote" function.
●It has a "software electronic dog" and a "hardware circuit fault protection circuit", which has strong anti-interference ability.
●There are three installation forms: cabinet type, frame type and collection type.
Technical parameters
Number of main transmuters: 3
Number of groups: 12
Single group large capacity: 10000kvar
Telemetry inputs:
The high-voltage side CT input is 0~5A
CT input on the low voltage side is 0~10A
PT input 0~80V
Weekly wave sampling points are 64 points
A/D accuracy 12 bits
Comprehensive error (50ms.
Switching output:
Number of outputs: 36 channels
Relay contact capacity: 250V/3A
Relay pulse hold: 2 seconds
Communication Parameters:
Communication interface: RS232, 485, 422 optional
Communication speed: 1200, 2400, 4800, 9600 optional
Channel Regulations: The new department issued CDT regulations
