Outline Harmonic distortion and power Quality The proliferation of nonlinear loads such as static power ...    More ...

Outline
Harmonic distortion and power Quality
The proliferation of nonlinear loads such as static power converters and arc furnaces results in variety of undesirable phenomena in the operation of power systems. The most important among these are harmonic contamination, increased reactive power demand and power system voltage fluctuations. Harmonic currents increase power systems losses, excessive heating in rotating machinery, can create significant interference with the power line communication. The harmonics are a growing problem for both electricity suppliers and consumers.
Problems cause by harmonics

• Malfunction of precision control
• Capacitor overloading and failures
• High current in neutral conductors
• Excitation of network resonance
• Damage to sensitive equipment
• Overheating of transformer, motor and cables
• Frequent tripping of circuit breakers

Features
Intelligent Power Quanlity FIlter(IPF)
PQ Tech offers a compact, cost-effective and completely integrated system solution for the growing number of applications. The IPF offers ability to eliminate the network harmonics from the supply source.

• Patent No.0459000 as Three Phase fourwire active power filter control device
• Meet IEEE Std.519-1992
• Solve Power Quality Problems
• Parallel connection allows easy retrofit for large system
• Curtailment of maintenance fee

Application

• Industrial, IPF3 (3P3W ) : 70~ 2000A, 380V ~ 600 V, 50Hz/60Hz
• Commercial, IPF4 (3P4W) : 70~ 1000A, 380V ~ 440 V, 50Hz/60Hz

Commercial(IPF4)

• Selectable Harmonic compensation
• Zero sequence harmonic compensation
• Neutral current compensation
• LCL based filter configuration
• Filters up to 50th Harmonic
• Harmonic attenuation factor is 98%.
• Reactive power compensation
• Phase/Load balancing
• Power factor control
• User friendly Graphical User Interface with LCD
• Remote based control of MMI Interface with graphical based Environment.
• RS232 communication compatible
• Fault and event logging in real-time.
• Advanced Modulation technology to reduce ultra low harmonic distortion

Operation of IPF
To Compensate Load Harmonics supplied by a source, IPF is connected to grid system
 
 


 
 
Unfiltered Source Current

 
Power Voltage. Current
 
Freq 59.968 Hz        
 
P1 66.51 kW U1 224.62 V I1 320.39 A
 
P2 67.93 kW U2 230.95 V I2 322.34 A
 
P3 55.35 kW U3 229.24 V I3 263.56 A
 
Psum 0.1898 kW U4 15.99 V I4 223.69 A
 
S1 71.96 kVA THD-U1 14.00 % THD-I1 30.21 %
 
S2 74.45 kVA THD-U2 13.07 % THD-I2 34.22 %
 
S3 60.42 kVA THD-U3 11.93 % THD-I3 29.74 %
 
Ssum 0.2068 kVA THD-U4 99.07 % THD-I4 97.12 %
 
Q1 -27.48 kvar Upk+1 0.2809 V Ipk+1 0.5018 A
 
Q2 -30.46 kvar Upk+2 0.2890 V Ipk+2 0.5369 A
 
Q3 -24.24 kvar Upk+3 0.2900 V Ipk+3 0.4189 A
 
Qsum -0.0822 kvar Upk+4 0.0297 V Ipk+4 0.3529 A
 
PF1 -0.9242 Upk-1 -0.2802 V Ipk-1 -0.4962 A
 
PF2 -0.9125 Upk-2 -0.2876 V Ipk-2 -0.5279 A
 
PF3 -0.9160 Upk-3 -0.2886 V Ipk-3 -0.4158 A
 
PFsum -0.9176 Upk-4 -0.0286 V Ipk-4 -0.3487 A
 
    Uave 228.27 V KF1 2.62
 
    Uunb 0.95 % KF2 2.86
 
        KF3 2.52
 
        KF4 8.72
 
        Iave 302.10 A
 
        Iunb 6.10 %
 

 
Filter Running
Filtered Source Current
 
Power Voltage. Current
 
Freq 59.940 Hz          
 
P1 67.18 kW U1 223.25 V I1 316.22 A
 
P2 69.33 kW U2 230.05 V I2 315.32 A
 
P3 56.17 kW U3 228.38 V I3 260.56 A
 
Psum 0.1927 kW U4 7.48 V I4 58.57 A
 
S1 70.59 kVA THD-U1 4.70 % THD-I1 0.77 %
 
S2 72.54 kVA THD-U2 4.66 % THD-I2 1.38 %
 
S3 59.51 kVA THD-U3 4.63 % THD-I3 1.30 %
 
Ssum 0.2026 kVA THD-U4 95.38 % THD-I4 6.99 %
 
Q1 -21.70 kvar Upk+1 0.2984 V Ipk+1 0.4464 A
 
Q2 -21.33 kvar Upk+2 0.3091 V Ipk+2 0.4439 A
 
Q3 -19.65 kvar Upk+3 0.3077 V Ipk+3 0.3707 A
 
Qsum -0.0627 kvarr Upk+4 0.0136 V Ipk+4 0.0904 A
 
PF1 -0.9516 Upk-1 -0.2981 V Ipk-1 -0.4481 A
 
PF2 -0.9558 Upk-2 -0.3075 V Ipk-2 -0.4493 A
 
PF3 -0.9439 Upk-3 -0.3071 V Ipk-3 -0.3710 A
 
PFsum -0.9508 Upk-4 -0.0126 V Ipk-4 -0.0873 A
 
    Uave 227.23 V KF1 1.01
 
    Uunb 0.94% KF2 1.02
 
        KF3 1.02
 
        KF4 1.22
 
        Iave 297.36 A
 
        Iunb 6.17 %
 

 
 
IPF Manager of IPF
Operator can control and view the operation of IPF, with user friendly graphical interface on LCD of IPF Panel

• Keypad interface to configure IPF filter
• Monitoring filter behavior and components
• Measurements of system variables
• Event Log for fault situation
• Network status monitoring
• Protection from Malfunctioning
• Parameter settings and operator settings
• Waveforms in graphical display

Man Machine Interface of IPF

• Remote based Control from PC (Personal Computer)
• Provides Windows-based graphical user interface
• Has full functionality
• Same menu structure as key pad interface with some additional features

Dimensions fo IPF
Type Rating Current(A) Outer dimensions(mm)
W D H
IPF4 -â–¡â–¡70 70 1050 800 2250
IPF4 -â–¡â–¡100 100 1050 800 2250
IPF4 -â–¡â–¡200 200 1050 800 2250
IPF4 -â–¡â–¡300 300 2100 800 2250
 
 

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