Zhuhai Wanlida Electrical Automation Co., Ltd.: Zhuhai, Guangdong, China; Main products: medium voltage variable frequency drive, medium voltage soft starter, static synchronous compensator/STATCOM, protection relay, active power filter

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400V 30A~600A APF harmonic problem solution

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Product Details

Place of Origin	Guangdong, China		Brand Name	Wanlida
Model Number	WLD-APF

400V 30A~600A APF harmonic problem solution

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%)
	Working voltage (V)	690V (-20%~+15%)	400V (-20%~+15%)
	Working frequency (Hz)	50/60	50/60
Performance Index	Filtering ability	THDI<3% (Rated Power)	THDI<3% (Rated Power)
	Filtering range	2^nd ~50^th	2^nd ~50^th
	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.

Zhuhai Wanlida Electrical Automation Co., Ltd.: Contact nameDaniel Wu
Chat Now; Phone86-756-3395623; AddressRelay Protection Industrial Park, No.1 Technology Road, Science and Technology Innovation Coast, High-tech Zone, Zhuhai, Guangdong