Modular Active Power Filter

Modular APF products mainly include I-type three-level program and two-level SiC program; Benefiting from the increasing switching frequency, the external device, especially the reactor volume can be greatly reduced, the high power density, to achieve products’ miniaturization. Bronze Technologies Ltd.independently developed three-level APF module, including two structures,sub-rack and wall-mounted a single cabinet and machine capacity can be up to 600A.

            

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Features
Parameter

? Parallel connection for easy maintenance;

? Dual DSP + FPGA full digital control system;

? Advanced FFT and symmetrical component algorithms,

? Selectively compensates for 2 to 51 harmonics;

? Selective compensation for harmonic, reactive, unbalanced, or simultaneous compensation;

? Harmonic compensation, the system current distortion rate THDi <5%;

?During the reactive power compensation, it can improve the system power factor to 0.99 or more;

?During the Asymmetric compensation, the system current imbalance can be less than 5%, while effective compensation for zero sequence current;

?Perfect protection system to ensure system security;

? A settable capacity limit output that does not cause an overload problem;

? Modular structure, multiple parallel operation, simple control, the largest single cabinet and machine capacity up to 600A;

? Friendly Chinese man-machine interface, simple operation;

? Fault display and fault record;

? State variable display: voltage, current, frequency, harmonic and sequence components, current harmonic distortion rate, voltage harmonic distortion rate.



Electrical

Characteristics

Nominal

voltage(V)

400V±20%

Operating  

Frequency(Hz)

50±0.5%

Electrical

Connection

Three-phase  three-wire / Three-phase four-wire

Three-phase  three-wire / Three-phase

four-wire

Power

topology

multi-level  inverters

Two-level  inverters

Rated filter current valid values(A)

50  100   150  200

25  50   100  150   200

CT requirement

3  CT secondary current is 5A

Filter Range

2-51  harmonics, the harmonics can be set separately

Filter Capacity

>90%full load

Reactive

Compensation

Built-in harmonic compensation, reactive compensation,  unbalanced compensation and other functions, the user can setup on their own

Response time

Less than 10 min

Loss

<3%, Rated power operation

Overload capacity

120%, 1min

Multiple  parallel

operation

A  group of CT, parallel operation,Maximum single cabinet capacity is 600A

Control

Characteristics

Switching frequency(Hz)

20kHz

30kHz

Control algorithm

FFT, instantaneous reactive power,  symmetrical components, direct current control

Controller

Dual DSP + FPGA

Communication

Using Modbus communication protocol to  support on-site monitoring and remote computer monitoring at the same time  (RS485)

Structural

Characteristics

Dimension

Width * Length * Height: 440mm * 575mm  * 232mm or customized

Weight

<60kg

Protection Level

IP20 or customized

Cooling method

Forced  air cooling

Overall  structure

Module

Installation

Indoor  installation, fixed way and cable into the line

Environmental

Conditions

Environment

Temperature

-10℃~+40℃

Relative  humidity

up to 90%, no condensation

Altitude

Installation  altitude is less than 2000 meters, shouldreduce capacity if the altitude is  higher than 2000 meters