400V/690V Aktibo nga Piltro sa Poder (APF)

Product Overview

Ang Active Power Filter (APF) mao ang usa ka high-performance nga device sa pag-optimisa sa kalidad sa kuryente nga gidesinyo pinaagi sa espesyal para sa medium ug low voltage distribution networks. Ang iyang core functions nag-focus sa harmonic control ug precise reactive power compensation, nga mahimo nga mas sayon nga makuha ug mabawasan ang harmonic interference sa power grid, samantalang giingon usab ang reactive power regulation, nga makaepekto sa pag-improve sa kalidad sa kuryente, pagbawas sa line losses, ug pag-ensure sa safe ug stable nga operasyon sa mga electrical equipment. Isip usa ka fully controlled power electronic device, ang APF nag-adopt og advanced detection algorithms ug power conversion technology, may fast response speed ug high compensation accuracy. Mahimo nito ang wideband harmonic suppression bisan wala na adunay additional filtering components ug suitable sa daghang scenarios nga may nonlinear loads. Kini mao ang core equipment alang sa pag-solve sa harmonic pollution ug pag-improve sa reliability sa power grid.

System structure and working principle

Core structure

• Detection unit: Integrated high-precision current/voltage detection module, real-time collection of current signals from the power grid and load, precise separation of harmonic components and reactive current through FFT and fast Fourier transform technology, providing data support for compensation control.

• Control unit: Equipped with a dual core control system of DSP and FPGA, it has fast computing speed and precise control logic. It is linked with the main circuit module through a high-speed communication bus (RS-485/CAN/Ethernet) to achieve real-time command issuance and status monitoring.

• Main circuit module: The bridge inverter circuit is composed of high-performance IGBT power modules, which have strong overload capacity and stable operation characteristics, and can quickly generate compensation current according to control instructions; Equipped with filtering and protection units to achieve current limiting, overvoltage protection, and electromagnetic compatibility.

• Auxiliary structure: including dual power supply modules, cooling systems, and protective cabinets to ensure continuous and stable operation of the equipment under complex working conditions.

Working principle

The controller monitors the nonlinear load current in the power grid in real time through the detection unit, uses FFT fast Fourier transform technology to analyze the amplitude and phase information of each harmonic current, and instantly calculates the required reverse compensation current parameters. Subsequently, the switching state of the IGBT module is controlled through PWM pulse width modulation technology to generate compensation current with equal amplitude and opposite phase to the harmonic current, which is accurately injected into the power grid and cancels out the harmonic current generated by the load. At the same time, reactive power can be dynamically adjusted according to demand, ultimately achieving sinusoidal current and power factor optimization in the power grid, significantly reducing harmonic distortion rate (THDi), and ensuring that power quality meets relevant national standards.

Cooling method

• Forced cooling (AF/Air Cooling)

• Water Cooling

Main Features

• Accurate and efficient harmonic suppression: It can suppress 2-50 harmonics, reduce the harmonic distortion rate THDi to below 5%, and achieve a compensation current resolution of 0.1A. It can accurately respond to complex harmonics generated by nonlinear loads such as frequency converters, arc furnaces, rectifiers, etc.

• Rapid response and dynamic compensation: With a response time of less than 5ms, it can track the dynamic changes of load harmonics and reactive power in real time without delay compensation, effectively solving the problem of power quality fluctuations caused by impact loads.

• Stable and reliable, with strong adaptability: adopting a dual power supply design and redundant protection mechanism, it has multiple protection functions such as overvoltage, undervoltage, overcurrent, overheating, and drive failure; The protection level reaches IP30 (indoor)/IP44 (outdoor), can withstand operating temperatures of -35 ℃~+40 ℃, and is suitable for various harsh working conditions.

• Flexible functionality, compatible with expansion: supports separate compensation for harmonics, separate compensation for reactive power, or a combination of both compensation modes; Compatible with multiple communication protocols such as Modbus RTU and IEC61850, it can achieve parallel network operation of multiple machines and meet the requirements of different capacity scenarios.

• Energy saving and environmentally friendly, economical and practical: its own power loss is less than 1%, no additional harmonic generation, and does not affect the original structure of the power grid; No need for large capacity capacitors or inductive components, compact structure, saving installation space and initial investment.

Technical Specifications

Mga Scenario sa Pag-apply

• Industriya: Bakal, metalurhiya (elektrikong arkong furnaces, continuous casting machines), pagmimina (frequency converter driven equipment), petrokemika (compressors, pumps), paggawa ng sasakyan (welding equipment, coating lines) at iba pang mga scenario na may maraming nonlinear loads, upang kontrolin ang harmonic pollution at tiyakin ang matatag na operasyon ng mga produktong makinarya.

• Pamilihan at sibiling gusali: sentral na air conditioning, elevators, lighting systems para sa mga opisina, shopping malls, hotels, UPS power supplies para sa data centers, server clusters, upang supilin ang harmonic interference at iwasan ang pinsala sa electrical equipment.

• Sa larangan ng bagong enerhiya, ang inverter side ng photovoltaic power plants at wind farms ay ginagamit upang kontrolin ang harmonics na idinudulot ng inverters, mapabuti ang kalidad ng bagong enerhiyang konektado sa grid, at mapanatili ang pamantayan ng grid access.

• Sa larangan ng transportasyon: electrified railway traction stations, urban rail transit power supply systems, solusyon sa harmonic at negative sequence problems na idinudulot ng traction loads, at istabilisahin ang power supply voltage.

• Iba pang mga scenario: medical equipment, precision instrument production lines, airport at port lifting equipment, at iba pang mga scenario na nangangailangan ng mahigpit na kalidad ng enerhiya, nagbibigay ng malinis na kapaligiran ng enerhiya.