Working principle: Based on the instantaneous reactive power theory, real-time detecting load harmonic and reactive component and the DSP control, PWM drive, remove the fundamental component and to the system into equal size, current in the opposite direction, filtering and reactive power compensation.
Working principle diagram
The scope of application:
Active power filter compensation device can be widely used in serious voltage, harmonic current and power factor low industrial, commercial, and government agencies and organizations, such as, use, such as chemical industry, metallurgy and other fields of AC and DC drive system, used in metallurgy industry, electric arc furnace, telecommunication power supply system, power supply system of securities trading, airport / port standby power supply, medical imaging systems, high-rise buildings, HTC generator, power system, precision electronic enterprise, electrolysis and electroplating enterprises, petrochemical enterprises.
The main characteristics and functions:
1 dynamic compensation of reactive power, transient response time is less than 1ms;
2 2 - 60 harmonic dynamic compensation;
3 providing instantaneous active power grid voltage drop compensation and flicker;
4 three-phase unbalance compensation;
5 grid can be run automatically, without the need for personnel to operate;
6 Chinese graphic LCD, friendly man-machine interface;
7 has the perfect self diagnosing and monitoring, fault location for convenient debugging;
Technical parameters:
Specifications
ZN-50/0.4
ZN-100/0.4
ZN-150/0.4
ZN-300/0.4
Harmonic current value
50A
100A
150A
300A
Product appearance
600 x 1000 x 400
600 x 1000 x 600
800 x 2200 x 400
800 x 2200 x 600
Working voltage (V)
380V + 10% (with the transformer can run on other voltage section)
working frequency
50/60 + 3HZ
performance index
efficiency
More than 96%
response time
Less than 20ms
Filter range
260 times
The total distortion rate of the compensated current THD
Less than 5%
Unbalance inhibition
95%
Reactive power compensation
98%
Work way
Continuous work
Expansion mode
Parallel use
High voltage domain adaptation scheme
Through the booster transformer can access the 10KV within the level of power grid
other
Protection level
IP22/IP54
Cooling mode
Forced air cooling
Control interface
Large screen LCD control panel PC direct control
Control kernel
TI dual core DSP
environment condition
ambient temperature
5 to 40 DEG C
Storage temperature
- 25 to 55 DEG C
relative humidity
95%, no condensation
Altitude
Below 3000m
Note: non standard size, specific capacity can be designed and produced according to user requirements.
Application examples:
The following is a comparative analysis of APF-DSTATCOM investment before and after:
Before and after compensation, the main frequency harmonic content compared to the following table:
Harmonic frequency
Harmonic content (compensation)
Harmonic content (compensation)
5 times
19.19%
4.20%
7 times
9.18%
1.68%
11 times
7.32%
0.53%
13 times
4.82%
0.70%
17 times
4.13%
0.64%
19 times
2.87%
0.54%
23 times
2.57%
0.40%
Total distortion rate
30.31%
4.77%
After the APF-DSTATCOM is put into operation, the total current of THD decreased from 30.31% to 4.77%, reached the national standard GB/T14549-93 harmonic distortion rate is less than 5% of the standard.
Application site map:
The implementation of standards:
GB/T14549-1993 "power quality: harmonics in public supply network"
GB/T15543-1995 "power quality: three-phase voltage unbalance allowed"
GB/T15945-1995 "power quality: power system frequency deviation allowed"
GB/T12326-2000 "power quality: voltage fluctuation and flicker"
GB/T12325-2003: "power quality admissible deviation of supply voltage"
GB/T18481-2001 "power quality: temporary and transient overvoltages"
GB/T155761995 "specifications of low - voltage reactive power static compensation device"
GB7625.11998 "harmonic current of low voltage electrical and electronic products issued by the limit"
GB4208-93 "classification protection grade"