KLD-AMS Series

Active Filters

Ensuring high power quality of industrial and commercial facilities, helping users in various industries to solve the thorny problem of harmonic interference in the power distribution system.

PRODUCT OVERVIEW

With the progress of science and technology, more and more power electronic devices and other non-linear loads are applied in companies, such as rectifiers, inverters, UPS, elevators, air conditioners, energy-saving lights, computers, household appliances, etc. These nonlinear loads generate a large amount of harmonic currents that are being injected into the power grid, leading to the voltage waveform distortion. This voltage harmonic pollution can cause serious harm to the grid and all back-end users. In addition, impacting and fluctuating loads, e.g., arc furnace welding equipment, not only generates a large amount of high harmonics in operation, but also causes voltage fluctuations, flickers and three-phase imbalance and other power quality problems, threatening the safe operation of the grid. Harmonics is virtually a kind of interference that “pollutes” the power grid.

KLD-AMS series active power filters are connected in parallel with the harmonic source. It quickly generates currents that are equal in size and opposite in direction to offset the harmonic currents produced by the harmonic source loads through real-time detection and tracking, thus eliminating harmonics and avoiding distortion of system voltage and current waveforms. The equippment has an adaptive function to compensate for harmonics of varying frequency and size, and quickly responds to the compensation object.

REAL-TIME DYNAMIC FILTERING RESPONSE

KLD-AMS series active filters can automatically track the system and control the harmonics according to the actual situation, and can filter out the 2nd to 71st harmonics.

When the active filter is in normal operation, it can filter the harmonics in the whole range at the same time, and also selectively filter harmonics of various orders, and adjust the filtering rate of random harmonic based on the requirements.

LAYERED INDEPENDENT AIR DUCT DESIGN

The module is designed in layered structure and equipped with a dedicated independent cooling system.

Internal layered design ensures that different functional areas are separated from each other, which is suitable for harsh environments, such as areas filled with dust and conductive particles, saline and alkaline, and humind environment. Each module is equipped with an independent heat dissipation structure, which can quickly transfer and dissipate heat to reduce the operating temperature of the equipment. The noise level of the whole machine is less than or equal to 60dB.

FAST FOURIER ALGORITHM

Derived from our experience in harmonic control in various industries, we continuously optimize the fast control algorithm based on FFT.

DSP decomposes the collected system waveforms through row calculation and identifies the characteristics of the harmonic components that need to be controlled. According to the set parameters and control requirements, it calculates the output current and generates the corresponding pulse width modulation signals to control the inverter IGBT switching devices, so that the main circuit can produce the waveforms as required and achieve the maximum control effect with minimum power consumption.

THREE-LEVEL TOPOLOGY STRUCTURE

The whole system adopts three-level topology, providing users with reliable control guarantee!

  • ●   Less ripple current.
  • ●   Less inductor loss.
  • ●   Less switching loss.
  • ●   Higher harmonic filtering efficiency.
  • ●   Higher internal conversion efficiency.
  • ●   Higher switching frequency excitation.
Technical Parameters

Input
Operating voltage 200~690V
Operating frequency 50/60±10%Hz
Performance index
Filtering capacity Up to 97%
Filtering range 2nd-71st harmonic
Full response time ≤10ms
Power factor correction Supported，configurable
IGBT Frequency 20kHz
Overload protection Automatic current limiting at 100% of rated output
Interface module
Display interface New full-color display, real-time display of system harmonics and harmonic current produced by equipment
Operation interface LCD intelligent operation unit
Language Simplified Chinese/English
Communication interface RS485/RS232
Environmental operation
Ambient temperature -10℃~+55℃
Storage temperature -40℃~+75℃
Relative humidity Maximum 95%RH (no condensing)
Altitude ≤1500 meters; between 1500-4000 meters, the power decreases by 1% for every 100m increase
Selection table

Model Rated Compensation Current（A） Rated voltage（V） type Cooling method
Three-phase three-wire system
KLD-AMS25-3L-400V-HD 25 400 Wall-mounted, with screen Forced air-cooling
KLD-AMS50-3L-400V-RD 50 400 Rack-mounted, with screen Forced air-cooling
KLD-AMS100-3L-400V-RC 100 400 Rack-mounted, centralized monitoring and control Forced air-cooling
KLD-AMS150-3L-400V-RC 150 400 Rack-mounted, centralized monitoring and control Forced air-cooling
three-phase our-wire system
KLD-AMS25-4L-400V-HD 25 400 Wall-mounted, with screen Forced air-cooling
KLD-AMS50-4L-400V-RD 50 400 Rack-mounted, with screen Forced air-cooling
KLD-AMS100-4L-400V-RC 100 400 Rack-mounted, centralized monitoring and control Forced air-cooling
KLD-AMS150-4L-400V-RC 150 400 Rack-mounted, centralized monitoring and control Forced air-cooling

Technical Parameters


  • Input

    Operating voltage：200~690V

    Operating frequency：50/60±10%Hz

    Performance indicators

    Filtering capacity：Up to97%

    Filtering range：2nd-71st harmonic

    Full response time：≤10ms

    Power factor correction：Supported，configurable

    IGBT Frequency：20kHz

    Overload protection：Automatic current limiting at 100% of rated output

    Interface module

    Display interface：New full-color display, real-time display of system harmonics and harmonic current produced by equipment

    Operation interface：LCD intelligent operation unit

    Language：Simplified Chinese/English

    Communication interface：RS485/RS232

    Environmental operation

    Ambient temperature：-10℃~+55℃

    Storage temperature：-40℃~+75℃

    Relative humidity：Maximum 95%RH (no condensing)

    Altitude：≤1500 meters; between 1500-4000 meters, the power decreases by 1% for every 100m increase

Selection table

Three-phase three-wire system

  • Rated Compensation Current（A）：25

    Rated voltage（V）：400

    Type：Wall-mounted, with screen

    Cooling method：Forced air-cooling

  • Rated Compensation Current（A）：50

    Rated voltage（V）：400

    Type：Rack-mounted, with screen

    Cooling method：Forced air-cooling

  • Rated Compensation Current（A）：100

    Rated voltage（V）：400

    Type：Rack-mounted, centralized monitoring and control

    Cooling method：Forced air-cooling

  • Rated Compensation Current（A）：150

    Rated voltage（V）：400

    Type：Rack-mounted, centralized monitoring and control

    Cooling method：Forced air-cooling

Three-phase our-wire system

  • Rated Compensation Current（A）：25

    Rated voltage（V）：400

    Type：Wall-mounted, with screen

    Cooling method：Forced air-cooling

  • Rated Compensation Current（A）：50

    Rated voltage（V）：400

    Type：Rack-mounted, with screen

    Cooling method：Forced air-cooling

  • Rated Compensation Current（A）：100

    Rated voltage（V）：400

    Type：Rack-mounted, centralized monitoring and control

    Cooling method：Forced air-cooling

  • Rated Compensation Current（A）：150

    Rated voltage（V）：400

    Type：Rack-mounted, centralized monitoring and control

    Cooling method：Forced air-cooling

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