This review paper is based on space vector based hysteresis current control in three phase PWM converter. In hysteresis current control technique, two, three or four level hysteresis comparator are used, which selects the appropriate inverter output voltage vectors by their switching phenomenon of vector based HCC, and it is used to control the current vector by keeping the current error vector in tolerance region. Through which the load gets desirable output current voltage. By keeping the zero phase difference between output current and voltage, acquires a high power factor by HCC voltage vector and this HCC voltage vector have some advantages over conventional HCC which are not to have interphase dependency and also maintaining constant modulation frequency or also reducing switching frequency. By this HCC, increase the system steady state performance and reducing dynamic response.

1. A DISSERTATION PRESENTATION
ON
PERFORMANCE ANALYSIS OF HYSTERESIS
CURRENT CONTROL HIGH POWER FACTOR
THREE PHASE PWM CONVERTER
Under guidance of- Submitted by-
Dr. A. N. Tiwari Anees Ansari (M. Tech.)
Associate Professor PED (EED)
Department of Electrical Engineering Roll No.130322002
Madan Mohan Malaviya University of Technology, Gorakhpur

2. Contents
 Introduction
 Three phase rectifier
 Need of controller
 Objective of work
 Proposed converter control circuit
 Hysteresis current Controller
 Simulation and Result
 Conclusion and Future Scope
 List of publications
 References
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3. Introduction
• An increasing the demand of DC power and is fulfilled by
converting AC to DC power through rectifier.
• But there are some drawbacks of semiconducting devices which
have non-linear property which
1. Increases the system harmonics
2. low input power factor.
• So the hysteresis current control technique is used to eliminate this
dis-advantages of rectifier.
• It improves the system efficiency, attain unity power factor and also
reduce system THD at 1.82%
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4. Three phase rectifier
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Fig. 1Three phase diode based bridge rectifier

5. Three phase bridge rectifier
• Three phase bridge rectifier is shown in figure
1 which is used to convert ac to dc source
• Connecting six diode in three arms and each
arms have two diodes.
• Upper diodes D1, D3 and D5 constitute the
positive group of diodes.
• The lower diodes D2, D4, D6 are the negative
group of diodes.
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6. Need of Controller
The need of controller to get:
• Unity power factor,
• Reduce system harmonics,
• Reducing switching frequency
• Achieve fixed DC voltage
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7. Objective of work
• The objective of the dissertation is to gain high power factor
and to reduce THD.
• The power factor attain by hysteresis current controller is
0.997 and the THD is1.82%.
• Without using hysteresis current controller the system power
factor is 0.7 and THD is 30.04%
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8. Scheme of proposed Work
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Figure 1 Hysteresis current controller based rectifier

9. • L is source inductance
• Ca and Cb are capacitive filter to reduce
Ripples at DC end.
• Sa, Sb and Sc are three bi-directional switches
used to eliminate system harmonics
• Hysteresis current controller is used to
generate switching signal to provide switching
in three bi-directional switches.
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10. Bi-directional switches
• These bi-directional switches are two
antiparallel connected IGBT which is shown in
figure. (2) and getting switching signal g1 and
g2 by hysteresis current control.
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Figure 2. Bi-directional switches

11. Block diagram of proposed control
method
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12. Block used in proposed control Circuit
• PLL
• dqo to abc transformation
• Dc voltage compensator
• Hysteresis current control
• Three bi-directional switches
• Two loops:
i. outer voltage loop
ii. Inner current loop
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13. Phase locked loop
• The Phase Lock Loop (PLL) is a closed-loop control
system,
• which tracks the frequency and phase of a
sinusoidal three-phase signal by using an internal
frequency oscillator.
• The control system adjusts the internal oscillator
frequency to keep the phases difference to 0.
• Phase locked loop circuit is used to get phase
• ωt which is uniformly increasing function of time
whose derivative is constant under any supply
voltage conditions.
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14. Park’s transformation
• The parks transformation is used to convert
dq0 to abc phases. Here “d” is direct axis “q” is
quadrature axis “0” zero sequence component
Ia
∗
Ib
∗
Ic
∗
= √
2
3
cosωt −sinωt
cos(ωt − 120) −sin(ωt − 120)
cos(ωt + 120) −sin(ωt + 120)
Id
Iq
I0
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15. • The current converter Id and Iq are the active
and reactive component of the converter
park’s transformation current.
• The park’s reactive current Iq=0 must be kept
in a null value in order to obtain an almost
unity power factor
• Due to absence of connection between ac
supply neutral point is and the rectifier, the
zero sequence is always zero
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16. DC voltage compensator
• The DC voltage compensator is used to
compensate DC output voltage and provide a
compensated dc value as output.
• The input of compensator is error signal
Vref − Vdc.
• The compensator is PI controller which have
2.35 proportional gain and 15 is integral gain
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17. Hysteresis Current Control
In hysteresis-band current control the actual
current tracks the command current within a
hysteresis band.
In this approach a sine reference current wave is
compared to the actual phase current wave. As
the current exceeds a prescribed hysteresis band,
the upper switch in the half-bridge is turned off
and the lower switch is turned on. As the current
goes below the hysteresis band, the opposite
switching takes place.

18. Figure 4 hysteresis current control

19. • Sx =
1, (ix > 0 and ix < ix
∗ − h
or ix < 0 and ix > ix
∗ + h
0, if (ix > 0 and ix > ix
∗ + h)
or (ix < 0 andix < (ix
∗ − h)
• The switching pattern is illustrated by
figure(4). The voltage is determined by the
switching states and current signs of all
phases.
• ix is current error
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20. • The hysteresis modulation is a feedback
current control method where the source
current tracks the reference current in a
hysteresis band. The conduction period which
is generated by hysteresis current controller is
to provide switches.
• The hysteresis control of supply current with
independent controllers the switching signal
𝑆 𝑥(x=123) of the bi directional switches are.
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21. Bi-directional switches
• These three bi-directional switches 𝑆 𝑎, 𝑆 𝑏, 𝑎𝑛𝑑 𝑆𝑐 are controlled to
conform supply current shape, output dc-link voltage regulation and
• Two capacitor are used for voltage balancing.
• The mathematical which is formulated are:
L
dia
dt
= Va − (Vam + Vmo)
L
dib
dt
= Vb − (Vbm + Vmo)
L
dic
dt
= Vc − (Vcm + Vmo) (1)
• Where Vmo is voltage of node M and it is referring to the neutral
point “O”.
• Voltage Vam, Vbm and Vcm are voltages of nodes A, B, and C
referring to the node M.
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22. Closed loop control block diagram
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Figure 5 closed loop control block

23. • Figure 5. having two feedback loop outer loop
is voltage feedback loop and inner loop is
hysteresis current control loop and the aim is
to get.
• Unity power factor and
• Reduce system harmonics
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24. Simulation and result
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25. EED, MMMUT, Gorakhpur 25
Fig. 5. Simulation diagram of proposed converter

26. S.No. Parameter Used For Simulation Circuit Data
1 Supply line to line voltages (Vrms) 220V;
2 Reference output voltage 750V;
3 Input source inductance 5mH;
4 DC link capacitor: Ca and Cb is 2000 u𝐹 each;
5 Output resistance is 100ohm;
6 The voltage compensator having PI controller specifications are 2.3 + 15/S
7 In dqo to abc transformation putting q = 0 for attain high power
factor;
Q = 0
8 Current feed forward parameter kfd is 1.2
9 Supply frequency is 50 Hz.
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specifications

27. DC output voltage without current
controller or with current controller
DC output Voltage without
current controller
DC output voltage with current
controller
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28. DC output current without current
controller or with current controller
DC output current without
current controller
DC output current with current
controller
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29. Three phase rectifier result without
hysteresis current control
Input voltage waveform Input current waveform
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30. Input power factor without controller
Input Voltage waveform Input current waveform
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31. Unity power factor by controller
Input voltage wave form Input current waveform
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32. Input power factor
Without hysteresis current
control With hysteresis current control
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33. THD without current controller
Source current Harmonics of source current
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34. THD with current controller
Source current FTT analysis of source current
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35. conclusion
The simulation results show that the power
factor is unity after applying controller in three
phase rectifier and harmonics is also reduced by
the controller. Before using controller system
power factor is very less which require high
current for rated load at low power factor. And
system increase harmonics due to non linear
property of semiconducting devices.
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36. Future work
• The future work is to improve the system stability
by reduced their losses which is happens in
hysteresis current controller are:
i. Reducing switching frequency
• and not to be used three separate controller reduce
to only used one controller.
• A new method or topology is used to reduce all
these dis advantages which is in the Performance
analysis of Hysteresis current controller High
power factor three phase pwm converter
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37. References
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EED, MMMUT, Gorakhpur 37

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39. References
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40. 16) K. M. Rahman, M. R. Khan, M. A. Choudhury, and M. A.
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41. 21)B.-H. Kwon, B.-D Min, and J.-H. Youm, “An
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42. LIST OF PUBLIACATIONS
1) Anees Ansari and A.N. Tiwari, “A review on performance analysis of
hysteresis current control high power factor PWM three phase
converter” proceeding of National Conference on Recent Advance in
Electrical Engineering, 25-26 Apr 2015.
2) Anees Ansari, and A. N. Tiwari, “A Review on Hysteresis Current
Controller and Space Vector analysis in Inverter” under review in
electrical engineering journal of I –Manager, probably published in Oct
2015.
42

43. Thank You
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