A large number of high-tech operations have used a
large number of variable frequency speed control devices in the
entire production process from spinning to weaving, which has led
to more and more power quality problems and harmonics in power
systems, and has caused a lot of disadvantages to the production
line. Causes the production line to have nylon chips, sizing
machines, yarn doubling machines, automatic winders, combers,
carding equipment, and tampers to use the automatic control
equipment and power electronics to prevent the heating temperature
from being controlled, resulting in serious product quality The
decline will cause huge economic losses to the company; the
electrical components such as transformers and busbars in the power
distribution room will be severely hotted, causing great potential
risks.Introduction The active power filter (APF) is
mainly composed of controller, isolation switch (circuit breaker),
contactor, IGBT, driving circuit, protection system, fuse,
connection reactor, DC capacitor, etc. The controller measures
phase A, C reactive power(current), produces control signal, drives
IGBT on/off and produces harmonic and reactive current same as
system harmonic current but in opposite phase to filter system
harmonic, reduce reactive power and keep system power factor
approximately at 1. Our APF equipment is module
structure,there are two types Wall Mounted and cabient mounted.The
Wall Mounted type is preferred to be used in equipment improvement
which is very conveninet to install. The Sanhe Modular
Active Harmonic Filter series are suitable for applications of all
types, providing harmonic mitigation, load balancing and step-less
reactive power compensation for inductive and capacitor loads.
FeatureCompact design, the biggest module is only 0.05 cubic
meter. High power density is more suitable for space-saving
required project or updated projects. Designed with same industrial
theory with high environment compatibility.Module control single
board is IP6X which was passed the test of 3rd party China national
lab.The output adopts the staggered parallel control method, which
can reduce the ripple current by nearly 40%;Millisecond-level
dynamic response, the full response time is less than 2ms, accurate
tracking of transient current changes in the power grid, avoiding
over-compensation and under-compensation Industry-leading IGBT
redundancy design, single-circuit failure does not affect the
normal operation of the system;The equipment is completely
disconnected from the power grid in the event of a fault, and there
is no port capacitor hanging on the grid, so as to avoid resonance
and leading reactive power effects on the power grid;Support CT
connection on the power supply side or load side, which can be
flexibly adjusted according to site conditions;With fast and
complete fault self-checking function, it can be intelligently
adjusted according to the on-site operating environment and
status;More convenient maintenance features, bus capacitors, fans,
etc. can be separated independently;Intelligent algorithm,
automatically adjust the compensation ratio according to the
real-time changes of reactive power and harmonics, and can also
flexibly set the compensation target to achieve the optimization of
the business target;Intelligent sleep, the parallel system adopts a
round-robin mechanism to evenly distribute the working time of each
module under low load and prolong the life of the modulePassed CE
certification, in line with EN 62477-1: 2012+A11-2014+A1-2017
standard;APF can compensate 2~51 harmonics instantaneously, and the
compensation range is larger;ASVG can compensate 2~23 harmonics,
and the harmonic compensation capacity and reactive power
compensation capacity can be set in full range;SVG can instantly
compensate inductive reactive power and capacitive reactive power
in full range, and solve the three-phase unbalance problem at the
same time.High reliability and high performanceThe industry's first
control layer dustproof module: effectively separates the control
part and the power part, the control layer adopts a fully enclosed
dustproof design, and there are no ventilation holes on both sides,
front and rear to ensure good sealing performance; The main power
components dissipate heat to ensure the heat dissipation
performance of the equipment. The control layer reaches the
protection level of IP6X, and has passed the experimental test of a
third-party organization. Make sure that the external environment
does not contaminate the control part. With the blessing of
industrial-grade hardware design, the security and reliability are
further improved.Specification SheetTable 1-1 Environmental
ParametersAltitude 40 oC, derating)Operating environmentIn-door,
free from moisture, dust, corrodent or flammable gases, oil mist,
vapor, water leakage or salt water.Storage/Shipment temperature-40
oC ~70 oCVibrationLess than 5.9m/s2 (0.6g)Table 1-2 Performance
ParametersItemDescrip
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