Wafangdian intelligent active filter compensation cabinet industry ranking

  Wafangdian intelligent active filter compensation cabinet industry ranking equipment introduction
Active filter compensation device bdkj-svg / APF is a new product independently developed and produced by Baoding Beidian Electric Technology Co
, Ltd
the device has unprecedented comprehensive power quality control ability
SVG mainly compensates reactive power, low-order harmonics within 13 times and three-phase imbalance
APF can filter harmonics within 2-50 times at the same time, with filtering capacity of more than 97%, and the complete compensation time for step change harmonics is less than 10ms Dkj-svg / APF can operate in parallel at the same time, and the overall efficiency is greater than 97
5%
It is fully applicable to various situations in industrial and civil fields
It is the best solution for nonlinear load harmonic control and reactive power compensation In case of external failure or power failure, the device will automatically exit the work, and automatically resume operation after power transmission without human intervention
 
Principle of active filter compensation device
 
Bdkj-svg / APF active filter compensation device can simultaneously filter harmonics, dynamically compensate reactive power, compensate three-phase imbalance, compensate voltage drop and other functions
1
Principle of filtering harmonics
Bdkj-svg / APF collects the current signal in real time through the external current transformer, separates the harmonic part through the internal detection circuit, and generates the compensation current with the same size and opposite phase as the harmonic in the system through the IGBT power converter, so as to realize the function of filtering the harmonic
The output compensation current of bdkj-svg / APF changes dynamically and accurately according to the harmonic quantity of the system, so there will be no over compensation problem In addition, APF / SVG has overload protection function
When the harmonic quantity of the system is greater than the filter capacity, the device can output automatically - at 100% rated capacity without overload
2
Principle of reactive power compensation
Bdkj-svg / APF generates capacitive or inductive fundamental current through IGBT power converter according to the reactive power of the system, so as to realize the purpose of dynamic reactive power compensation
The compensation target value can be set through the operation panel, without over compensation, smooth compensation and inrush current impact on load and power grid
3
Principle of compensating three-phase imbalance
Bdkj-svg / APF rotates the dq coordinate according to the system current and extracts the unbalanced component
The three-phase sends out the current with the same size and opposite phase as the unbalanced component
By compensating the unbalanced part to zero, the three-phase unbalanced current can be corrected into three-phase balanced current Functional features
1．  Modular design, any module failure will not affect the positive of other modules It works normally, which greatly improves the reliability of the whole equipment
2．  It can filter the harmonic current below 2 ~ 50 times at the same time, and make the current distortion rate at the power grid side THDi & lt; 3%, THDi & lt at half load; 4%; Reactive power compensation can make the power factor reach 1; It can correct the imbalance of three-phase current to complete balance;
3．  Filtering, reactive power compensation and three-phase unbalance compensation can be selected individually or multiple times, and the priority of functions can be set;
4．  Using the sliding window iterative DFT detection algorithm, the calculation speed is fast, the instantaneous response time is less than 0
1ms, and the full response time of the device compensation is less than 10ms;
5．  Sampling at load side or grid side can be selected at the CT wiring position on site;
6．  It can be connected in parallel with any LC passive equipment without resonance;
7．  Reliable current limiting control link is adopted
When the current to be compensated in the system is greater than the device capacity of active filter / static var generator, the device can automatically limit the current output at 100% capacity and maintain positive , It works normally without overload, burning and other faults;
8．  The main circuit adopts three-level structure with three bridge arms, which has high output waveform quality and low switching loss;
9．  It adopts high-definition 7-inch touch screen, which is easy to operate
The screen displays the operating parameters of the system and device in real time, and has the function of fault alarm and recall;
10
The input end of active filter / static var generator is designed according to secondary lightning protection, and is equipped with reliable surge protection device to protect the equipment from lightning stroke;
11
Adopt layered design, dust and rain will not adhere to the circuit board, so it is suitable for use under harsh working conditions
application area
This product is widely used in hospitals, office buildings, shopping malls, telecommunications machine rooms, electrified railways and urban rail transit industries, petrochemical and natural gas industries, steel and metallurgy industries, Mining, shipbuilding and other industries, industrial and mining enterprises and other industries that use more rectifier and inverter electrical equipment and need filter compensation
Wafangdian intelligent active filter compensation cabinet industry ranking