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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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