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Wanlida Active Filter
1. Topology structure
The main topology structure is three-phase H-bridge star connection, modularized power components are easy to maintenance and replace.Power modules adopt force air cooling, fans are made in Germany.The control system adopts Spartan3adsp FPGA of Xilinx.
2. Technical Parameters
WLD-APF | 3Wires | 4Wires | |
Rated compensation current | 100A~600A | 50A~600A | |
Input | Working voltage (V) | 400V (-20%~+15%) | 400V (-20%~+15%) |
690V (-20%~+15%) | |||
Working frequency (Hz) | 50/60 | 50/60 | |
Performance Index | Filtering ability | THDI<3% (Rated Power) | THDI<3% (Rated Power) |
Filtering range | 2nd ~50th | 2nd ~50th | |
Single harmonic compensation rate adjustment | Can set compensation current for each harmonic | Can set compensation current for each harmonic | |
Instantaneous response time | <100µs | <100µs | |
Fully response time | <10ms | <10ms | |
Active power loss | <3% (Rated Power) | <3% (Rated Power) | |
Three-phase unbalance correction | Yes | Yes | |
Reactive power compensation | Yes, can set power factor | Yes, can set power factor | |
Overload protection | Current limit automatically at 100% rated output | Current limit automatically at 100% rated output | |
Switching frequency | 20KHz | 20KHz | |
Display and Operation | Display Interface | 5.7inch colorful touch screen | 5.7inch colorful touch screen |
Display State | Current, voltage etc power grid parameters | Current, voltage etc power grid parameters | |
Communications | Modbus, RS485, TCP/IP Ethnet | Modbus, RS485, TCP/IP Ethnet | |
I/O dry contactor | 5 output contactors, 4 input contactors (user-defined) | 5 output contactors, 4 input contactors (user-defined) | |
Environment Temperature | Environment temperature | -10°C~+40°C. | -10°C~+40°C. |
Storage temperature | -40°C~+65°C. | -40°C~+65°C. | |
Humidity | <95%, no condensation | <95%, no condensation | |
Altitude | Below 1000m | Below 1000m | |
3. Key components and technical features
3.1 Traction level IGBT module
Adopt international high-quality IGBT module.The fourth generation IGBT technology.Switching loss and conduction loss reduced dramatically.Temperature period and power period enhanced dramatically, the lifetime prolongs.Redundancy design of module ensures APF reliable and safety.3.2 Power Unit
It is the core circuits of APF, used for power conversion. Modularized design, all power units have same structure and electrical performances, they can be interchangeable.4. Fully digital control system
Adopting Spartan3adsp FPGA chip of Xilinx.Calculate harmonic and reactive power in real time, and then realize dynamic track and compensation.The control system adopts modularized design.Wanlida Active Filter