Predictive Control of Three Phase AC/DC Converters

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106 CHAPTER 6. EXPERIMENTAL STUDY 6.4 Summary In order to verify the behavior of the predictive control methods several experimental test have been carried out. This Chapter evaluates both VSF and CSF predictive methods, along well known ST-DPC and DPC-SVM. Additionally, for selected methods, a low switching frequency operation have been investigated. Control Method t set [µs] t r [µs] t r2 [µs] ST-DPC 600 190 400 VSF-P-DPC 420 390 400 HC-VSF-P-DPC 600 100 300 FL-VSF-P-DPC 600 100 300 DPC-SVM 1000 600 500 CSF-P-DPC 600 260 450 VF-CSF-P-DPC 600 260 450 Table 6.4: Summarized dynamic properties of control methods for P ref step change Control Method t set [ms] t r [ms] Overshot [%] ST-DPC 50 25 5 VSF-P-DPC 50 25 5.5 HC-VSF-P-DPC 50 25 3 HC-VSF-P-DPC 50 25 3 DPC-SVM 55 30 4 CSF-P-DPC 50 35 3.5 VF-CSF-P-DPC 50 35 3.5 Table 6.5: Dynamic properties of control methods for U DCref step change Control Method t set [µs] t r [µs] DPC-SVM 4000 2000 CSF-P-DPC 1500 1000 VF-CSF-P-DPC 1500 1000 Table 6.6: Summarized dynamic properties of control methods for P ref step change with low switching frequency The Predictive methods have very good results both in steady-state (see Tab. 6.2) and transients (see Tab. 6.4 and Tab. 6.5). The comparative study between ST-DPC and variable switching frequency predictive methods establish that for comparable switching frequency VSF-P-DPC has the same dynamic features, but it gets lower T HD factor (1% of improvement).
6.4. SUMMARY 107 Control Method t set [ms] t r [ms] Overshot [%] DPC-SVM 90 40 4 CSF-P-DPC 55 35 3.5 VF-CSF-P-DPC 55 35 3.5 Table 6.7: Dynamic properties of control methods for U DCref step change with low switching frequency In a similar way, a comparison between DPC-SVM and constant switching frequency predictive methods have been done. It has been shown that both predictive methods; CSF-P-DPC and VF-CSF-P-DPC have improved dynamic as well as T HD factor is decreased in relation to DPC-SVM (1.4% improvement). The same conclusion can be noted in case of low switching (sampling) frequency operation (see Tab. 6.6, and Tab. 6.7). The P ref step response is about two times faster and T HD factor in steady state is reduced by 1%.
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WARSAW UNIVERSITY OF TECHNOLOGY Fac
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Contents Contents i 1 Introduction
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CONTENTS iii List of Symbols and Ab
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Chapter 1 Introduction AC/DC Voltag
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Based Trajectory Based Deadbeat Con
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5 which properties are deteriorated
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Chapter 2 Voltage Source Converter
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(Sa=1, Sc=0) UP2 (Sa=1, UP1 Sb=1, S
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IL UL jωLIL UL jωLIL 2.2. MATHEMA
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ILα 1 sL+RSα - ULα 32IDC 1 sCUDC
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2.3. SUMMARY 15 2.3 Summary In this
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Iqref Idref ILq ILd ILq φ uLab UDC
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UDC Filter 20 CHAPTER 3. CONTROL ST
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Qref dP dQ uLab UDC Sabc 22 CHAPTER
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24 CHAPTER 3. CONTROL STRATEGIES FO
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Qref Pref uLab UDC Sabc 26 CHAPTER
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UDC Filter 28 CHAPTER 3. CONTROL ST
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ILq φ ωL 30 CHAPTER 3. CONTROL ST
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Lα 32 CHAPTER 3. CONTROL STRATEGIE
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Chapter 4 Predictive Direct Power C
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4.3. VARIABLE SWITCHING FREQUENCY P
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UPdqUDC Qref UDCSabc uLab iLab 4.3.
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UPdqUDC UDCSabc uLab iLab 4.4. CURR
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UPdqUDC Qref Pref UDCSabc uLab iLab
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4.6. CONSTANT SWITCHING FREQUENCY P
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PP1 fq1 fq2 PP4 PP5 PP6 PP3 fp3 fp3
Page 65 and 66: Sb Sc Sa Sb Sa Sc Sb Sa 4.6. CONSTA
Page 67 and 68: fqi fpi Qref Sabc 4.6. CONSTANT SWI
Page 69 and 70: 4.7. VF BASED CSF - PREDICTIVE DIRE
Page 71 and 72: Qref fpi Sabc iLab 4.7. VF BASED CS
Page 73 and 74: 4.8. SIMULATION RESULTS 63 200 150
Page 77 and 78: 4.8. SIMULATION RESULTS 67 Mag (% o
Page 85 and 86: 4.9. SUMMARY 75 Control Method t se
Page 87 and 88: Chapter 5 Investigations of Control
Page 89 and 90: 5.1. ROBUSTNESS TO PARAMETERS MISMA
Page 91 and 92: Sabc UDC UPαβ UPαβ Lest Lest UP
Page 93 and 94: 5.4. LINE VOLTAGE DISTURBANCES 83 (
Page 95 and 96: 5.4. LINE VOLTAGE DISTURBANCES 85 (
Page 97 and 98: 5.4. LINE VOLTAGE DISTURBANCES 87 C
Page 99 and 100: Chapter 6 Experimental Study Experi
Page 101 and 102: 6.1. STEADY STATE OPERATION 91 (a)
Page 103 and 104: 6.1. STEADY STATE OPERATION 93 Cont
Page 105 and 106: 6.2. TRANSIENT OPERATION 95 (a) ST-
Page 111 and 112: 6.3. OPERATION WITH LOW SWITCHING F
Page 113 and 114: 6.3. OPERATION WITH LOW SWITCHING F
Page 115: 6.3. OPERATION WITH LOW SWITCHING F
Page 120 and 121: 110 CHAPTER 7. SUMMARY AND FINAL CO
Page 122 and 123: 112 BIBLIOGRAPHY [11] K. Hyosung an
Page 124 and 125: 114 BIBLIOGRAPHY [38] A. Nasiri,
Page 126 and 127: 116 BIBLIOGRAPHY [66] F. Morel, J.
Page 128 and 129: 118 BIBLIOGRAPHY 13. A. Lopez de He
Page 131 and 132: Appendix A Coordinate transformatio
Page 133 and 134: q β A.2. ROTATING SYSTEM 123 A.2 R
Page 135 and 136: Appendix B Predictive Current Contr
Page 137 and 138: ∆ILαβP6 ∆ILαβP5 Figure B.2:
Page 139: Figure B.4: Vector diagram of predi
Page 142 and 143: 132 APPENDIX C. PREDICTIVE DIRECT P
Page 145 and 146: List of Symbols and Abbreviations S
Page 147 and 148: 137 Symbols Description Definition
Page 149 and 150: List of Figures 1.1 Conjunction bet
Page 151 and 152: LIST OF FIGURES 141 5.3 Line curren
Page 153: LIST OF TABLES 143 B.2 An example o
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Predictive Control of Three Phase AC/DC Converters

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