Wanlida Low Voltage Active Harmonic Filter - China

Active harmonic filter can dynamically filter harmonic with variable

amplitude and frequency and compensate reactive power.

Wanlida Active harmonic filter

Technical Principle

Active harmonic filter (APF/AHF) is new power electronic equipment which can dynamically filter harmonic with variable amplitude and frequency and compensate reactive 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.

APF 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 converter.

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 interference

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) directly

Parallel connection, easy for filtering capacity expansion

Modularized design, easy for maintenance

Perfect protection functions

Faults record and history inquire

Support multiple communication protocols

Technical Parameters

SN

Parameters

Value

1

Power Supply Voltage(kV)

0.4/0.69kV (±15%)

2

Power Supply Frequency (Hz)

50/60Hz

3

Power Supply Mode

Three-phase three wires or three-phase four wires

4

Harmonic Compensation Components

2~50

5

Response Time (ms)

<10ms

6

Output Current(A)

25~750A

7

Protection Mode

Over current, overheat, phase loss, Error-phase, DC busbar over/under voltage, Current limit for overload etc

8

Loss

<5%

9

Operation Display

Touch screen

10

Operation Environment

-100C~+450C

11

Altitude

<1000m

12

Relative Humidity

<90% (250C)

13

Noise

<70Db

14

Compensation capability

All within compensation capacity

15

Compensation Mode

Harmonic compensation, reactive power compensation or Both

16

Switching Frequency

20kHz

17

Cooling Mode

Forced air cooling

18

IP

IP20

19

Color

RAL7032

20

Feed Direction

Top/Bottom

21

Communication

RS485/RS232

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

Model

Output current(A)

Dimension(W×D×H)mm

WLD-APF-0.4-75-3L

WLD-APF-0.4-75-4L

75

800×600×2200

WLD-APF-0.4-150-3L

WLD-APF-0.4-150-4L

150

800×800×2200

WLD-APF-0.4-225-3L

WLD-APF-0.4-225-4L

225

WLD-APF-0.4-300-3L

WLD-APF-0.4-300-4L

300

1200×1000×2200

WLD-APF-0.4-375-3L

WLD-APF-0.4-375-4L

375

1600×800×2200

WLD-APF-0.4-450-3L

WLD-APF-0.4-450-4L

450

WLD-APF-0.4-525-3L

WLD-APF-0.4-525-4L

525

WLD-APF-0.4-600-3L

WLD-APF-0.4-600-4L

600

2400×1000×2200

WLD-APF-0.4-675-3L

WLD-APF-0.4-675-4L

675

WLD-APF-0.4-750-3L

WLD-APF-0.4-750-4L

750

The above dimension is our standard cabinet for 400V AHF (Active harmoni filter) and the wall-mounted cabinet or other voltage level AHF can be designed according to requirements of users.

Company Contact:

• Posted By: Zhuhai Wanlida Electric Co., Ltd.

• Phone: 867563395623

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

• Email:

• Website: http://www.zhwld.com/

• 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.