Application of Elecnova Active Filter in Port and Wharf

Many of the loads in the port terminal are repetitive short-time working system (frequent starting/braking, positive/reverse rotation, rising/falling), and the load current, power and power factor change rapidly and greatly. Therefore, the reactive compensation device must be able to switch quickly, closely follow the reactive demand of the load, and achieve the role of improving the power factor and stabilizing the grid voltage. At the same time, with the development of power electronics technology, in recent years, the equipment used in domestic ports generally adopts thyristor powered DC system or AC-AC frequency conversion speed regulation system, and the number is increasing year by year. These electric energy conversion devices and their electrical equipment belong to nonlinear electrical equipment and are typical harmonic sources. When this kind of equipment works, it not only absorbs a large amount of impulsive reactive power to the power system, but also affects the voltage stability of the power grid. Moreover, a large number of harmonics are injected into the power grid, which seriously affects the power quality of the power grid. Therefore, in the power grid system of the port area, effective measures must be taken to improve the power quality. The use of reactive power compensation and harmonic treatment devices can effectively improve the power factor and reduce harmonics, eliminate the pollution of the power grid, improve the power supply capacity of the power grid, and provide high-quality power for equipment.

The SFR-APF series active power filter cabinet is a new type of power electronic device used for dynamic harmonic filtering. It can filter out harmonics (both in size and frequency) in real time, overcome the shortcomings of traditional filters in harmonic suppression and reactive power compensation, and achieve the harmonic filtering function and reactive power compensation function of the system. It is particularly suitable for situations with high harmonic content, low power factor, and large load fluctuations, and is widely used in ports, metallurgy, petroleum, chemical, and industrial and mining enterprises.

More features and modes

01 Harmonic compensation, reactive power compensation, and harmonic reactive power co compensation, with multiple uses for one machine;

02 Equipped with harmonic division compensation function, capable of setting reactive power compensation ratio;

03 High definition 7 (10) inch Chinese and English color touch screen, with real-time display of system and device operating parameters on the screen;

Comprehensive protection function, improving user application stability

01 The effective value peak double setting automatic current limiting algorithm can automatically limit the device output to 100% without overload risk when the load harmonic current is greater than the device output;

02 The protection function is complete, with multiple protection functions such as overcurrent, overvoltage, undervoltage, and overheating, ensuring the safe and reliable operation of the system;

Advanced control strategies and topology design

01 The improved detection technology based on instantaneous reactive power theory can detect harmonic currents in real time, automatically track changes in load harmonics, and has high controllability and fast responsiveness;

02 Adopting a unique phase-shifting harmonic extraction algorithm, independent control of each phase can be achieved when the load is three-phase unbalanced. When the capacity is sufficient, the imbalance function can be optionally eliminated;

03 Adopting LCL topology filtering, it will not introduce high-frequency IGBT switch harmonic interference when outputting harmonic current, and is suitable for impedance of any on-site power grid system without resonance;

Highly integrated, modular, and serialized

01 Modular design, small size, light weight, high power density, easy installation and maintenance;

02 Combining and combining machines to meet different capacity requirements, while achieving standardized production, improves equipment reliability and maintainability, greatly facilitating system installation and maintenance;

03 Single module independent air duct design can effectively isolate environmental dust adhesion and improve product heat dissipation efficiency.

In the power grid system of the port area, effective measures are taken to improve the quality of the power grid to meet the standards. The use of reactive power compensation and harmonic control devices can effectively improve the power factor and control harmonics to meet national standards, reduce harmonic pollution in the power grid, improve the power supply capacity of the power grid, and provide high-quality power supply for equipment. As your digital intelligent distribution solution supplier, SF Electric has always been committed to achieving energy conservation and emission reduction, and reducing costs and increasing efficiency for customers.