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  • Wanlida Hybrid Harmonic Filter - China

    price: contact company for price

    Hybrid harmonic filter can dynamically filter harmonic with

    variable amplitude and frequency and compensate reactive


    AHF Technical Principle

    Active harmonic filter (APF/AHF) is new power electronic

    equipment which can dynamically filter harmonic with

    power, it overcome the shortages of conventional LC filter

    and obtained the better compensation performances than

    passive filter.

    The right diagram is schematic diagram of active harmonic

    filter (APF/AHF), where, Vs is AC power supply, nonlinear

    load is harmonic source, it generates harmonic and consumes

    reactive power. AHF system is composed of instruction

    current operational circuit and compensation current

    generation circuit, the instruction current operational

    circuit is mainly to detect current components in harmonic

    current and reactive power of compensation object, and the

    compensation current generation circuit generates equivalent

    compensation current with same amplitude and inverse

    polarity with harmonic current to filter harmonics according

    to instruction signal, the main circuit adopts PWM


    AHF Functions

    Reduce harmonic distortion

    Improve power factor

    Reduce line loss

    Prevent neutral line from overheat

    Prevent power equipments from noise, overheat and vibration

    like motor, transformer etc.

    Prevent signal transmission equipments from data loss and


    Prevent measurement error caused by non-sinusoidal current

    and voltage.

    Prevent sensitive semi-conductive device from damage

    Prevent circuit breaker trip.

    Prevent capacitors from burn due to harmonic resonance

    Ensure safety of power system and reduce energy consumption

    AHF Technical Features

    Can filter all kinds of harmonic currents

    Filtering capability >95% for aimed harmonic

    Traction level IGBT module, 20KHz switching frequency

    Response time <10ms

    Single capacity up to 300A

    Suppress three-phase unbalance

    Conform to IEEE Std. 519-1992, GB/T 14549

    Can be used as harmonic source

    Apply closed-loop control, and ensure filtering accuracy

    Can set filtering mode and select harmonic filtering type

    Adapt automatically to impedance change of power network

    Can connect 690V system(CE/C-tick) and 600V system(cUL)


    Parallel connection, easy for filtering capacity expansion

    Modularized design, easy for maintenance

    Perfect protection functions

    Faults record and history inquire

    Support multiple communication protocols

    Factory Acceptance Test Platform

    We built the first-class high voltage and big capacity

    active harmonic filter test platform to realize Factory

    Acceptance Testing for whole machine before delivery.

    Model and Dimension


    Output current(A)





































    The above dimension is our standard cabinet for 400V APF

    (Active harmonic filter) and the wall-mounted cabinet or

    other voltage level APF can be designed according to

    requirements of users.

    Company Contact:

    • Phone: 867563395623

    • Address: Wanlida Relay Protection Industrial Park, No. 1 Te, Zhuhai, China

    • Email: Email

    Published date: August 23, 2013 -

    • Business Description: Incorporated in 1991, Zhuhai Wanlida Electric Co., Ltd. (www.zhwld.com)

      ('the Company'), is located in Relay Protection Industrial Park, No.1

      Technology Road, Science and Technology Innovation Coast, High tech

      Zone, Zhuhai City, coving a land area of approximately 60 thousand

      square meters (including Park 1 and Park2). The Company was listed for

      equity financing on November 13, 2007 (equity securities abbreviated as:

      Wanlida stock certificates, code: 002180), with a registered capital of

      124,980,000 Yuan. The Company keeps on her aggressive 'production,

      study, research and application' co operation with the famous academies

      such as Tsinghua University, Chinese Academy of Sciences and Central

      China University of Science and Technology and carries out relevant

      technology innovation. It is a national high tech enterprise that deals

      with specialized development, production and sales of substation

      integrated automation systems and Medium voltage variable frequency

      drives, Medium voltage magnetically controlled soft starters, Static

      synchronous compensator(STATCOM/SVG), Static VAR compensator(SVC),

      Active power filter(APF/AHF), Thyristor switched capacitor bank

      (TSC/TSF), High voltage direct current light transmission systems etc

      power electronic equipments. In addition, the Company is known as a

      famous manufacturer and backbone enterprise of transformer substation

      integrated automation and power electronic equipments fields in China,

      and it also acts as fresh blood in the field of energy conservation and

      emission reduction.

      Wanlida passed the ISO9001 quality system certification, ISO14001 Environment Management System Certification and OHSMS18001 Occupation Health &Safety Management System Certification; All products passed the test of sated authoritative inspection bureau. And it had been rated as 'National High and New Technology Enterprise', 'Enterprise Recommended by State Economic and Trade Commission for Reconstruction of Urban and Rural Electric Grids', 'Key Software Enterprise Covered by National Program', 'Excellent enterprise of China', 'First choice Manufacturer for Electric Framework Protocol Sponsored by CNPC', 'Excellent Enterprise of Guangdong Province', 'Optimum Good faith Enterprise of Guangdong Province', 'Contract honoring Enterprise of Guangdong Province', 'Top 10 Private Enterprises of Zhuhai City', and 'Enterprise with Grade AAA Bank Credit '.

      Wanlida has a very strong R&D teamwork which has a population of over 100 with doctor's degree, postgraduate degree and bachelor's degree etc, and all of the products are designed strictly according to IEC standards; Wanlida has modern standard workshops, it brought advanced SMT production lines and wave soldering machines into company from abroad, and built the first class high voltage and big capacity power electronic equipments assembling and test platform, which is able to realize full load test and ensure that all of products have exquisite technics and reliable quality; At present, Wanlida covers all of domestic areas except Hongkong, Macau and Taiwan, and it also sells the products to Southeast Asia, Middle East, South America, Africa etc over 20 countries.

      The Company aims to grow into the most dedicated electric automation enterprise in the world, and commits itself to building the aircraft carrier of power electronic energy efficiency products.

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