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Drawer type active filter
Drawer type active filter
Overview
Drawer type active filter - the active power filter unit with IGBT (Insulated Gate Bipolar Transistor) switch as the core, detects system current in real time, separates the harmonic current successively based on digital fast Fourier transform technique, generates control signals according to the set compensation percentage to drive the IGBT to generate compensation currents of equal magnitude and opposite phase, which offset each other with harmonic components of system current to achieve harmonic filtration effect.
Technical parameters
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Rated voltage |
Line voltage: 0.38kV±20%; Phase voltage: 0.23kV±20% |
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frequency |
50Hz±5%or60 Hz ±5% |
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Rated current |
30A, 45A, 50A, 60A, 75A, 80A |
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Overload capacity |
120% rated compensation current/60s |
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Response time |
≤5ms |
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Loss |
≤2.5% am) |
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Compensation rate |
≥97% |
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Total Harmonic Current Distortion |
THDi ≤ 3% (full load) |
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Noise |
≤60dB |
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Switching frequency |
20kHz |
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Function set |
Combination of harmonic compensation, reactive compensation, unbalance compensation and free compensation with priority |
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Cooling method |
Air cooling |
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CT position |
Free selection on load side or power side |
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Communication |
RS485, LAN, Modubus protocol support |
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Product’s terminal block diagram
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 |
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(Plug-in terminal type) |
(Pluggable terminal type) |
Product advantages
● Advanced control architecture and powerful arithmetic capability
The multi-core digital control architecture of DSP+FPGA+ARM is used to make full use of the hardware parallel processing advantage of FPGA and DSP digital signal processing capability, which greatly improves the computational processing capability and response speed of the control system.
● Modular design for easy installation
Modular design is used, with compact structure, the unique cooling channel of good heat dissipation effect and simple wiring, which greatly saves assembly time and space.
● Flexible wiring mode
Be provided with phase sequence self-adaption, and there’s no need to distinguish the phase sequence of A/B/C phase, which simplifies the installation procedure; The system current transformer can be located on the system side or on the power side, which reduces the difficulty of reconstruction.
● Three-level technology
The hardware configuration is more reasonable with the use of three-level topology, which greatly reduces the volume and loss of drawer type active filter and conforms to the development direction of energy saving of power grid
● Paralleling of multiple operation modes
Be provided with three operation modes of unbalanced current compensation, harmonic filtration and reactive compensation, and these three operation modes can be freely combined according to priority setting.
Product size
|
Capacity (kvar.) |
30A | 45A | 45A | 50A | 60A | 75A | 80A |
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W(mm) |
500 | 500 | 500 | 500 | 500 | 500 | 500 |
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H(mm) |
190 | 190 | 190 | 190 | 190 | 190 | 190 |
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D(mm) |
550 | 550 | 550 | 550 | 550 | 550 | 550 |