A Reduced Switch AC-AC Converter with the Application of D-STATCOM and Induction Motor Drive
Abstract
:1. Introduction
2. System Description and Operation of NSC
3. Generation of Gate Signal and Operating Constraints of the NSC
4. Control Logic of the Proposed System
5. Simulation Result
6. Experimental Setup and Result
6.1. NSC Operated at Unity Power Factor Condition
6.2. NSC Operated at Lagging Power Factor Condition
6.3. NSC Operated at Leading Power Factor Condition
7. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
Abbreviations
DG | Distribution generation |
NSC | Nine switch converter |
DSTATCOM | Distribution static compensator |
TSC | Twelve switch converter |
SG | Synchronous generator |
PCC | Point of common coupling |
FACTS | Flexible Alternating Current Transmission System |
Vs | Phase voltage of grid |
is | Phase current of grid |
i1 | Phase current of reactive load connected across NSC |
ia | Phase current of NSC |
Vcom | NSC input phase voltage |
Vinv | NSC output phase voltage |
iL | NSC output phase current |
a | Angle between Vs and ia |
1 | Angle between Vs and i1 |
0 | Angle between Vinv and iL |
Vd | DC-link voltage |
Instantaneous angle of the grid | |
Power angle between Vs and Vcom | |
Refrec | Modulation references for rectifier operation |
Refinv | Modulation reference for inverter operation |
Vc | Carrier reference |
mr | Modulation index of Refrec and Refinv respectively |
Ls | Source inductance |
Rs | Internal resistance of the source inductor |
a,b,c | Input terminals of the NSC |
x,y,z | Output terminals of NSC |
N | Common point of negative dc-link voltage |
VaN | Pole voltage between terminal a and N |
VxN | Pole voltage between terminal x and N |
Id* | Generated active current reference |
Qrec | Reactive power at PCC |
QNSC | Reactive power of NSC |
Qload | Reactive power of other load connected across NSC |
Qref | Desired reactive power at PCC |
Vab1 | Fundamental component of the NSC input line voltage |
Vxy1 | Fundamental component of NSC output line voltage |
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Switching States (SS) | S1 | S2 | S3 | VaN | VxN |
---|---|---|---|---|---|
Valid states | |||||
1 | 1 | 1 | 0 | Vd | Vd |
2 | 1 | 0 | 1 | Vd | 0 |
3 | 0 | 1 | 1 | 0 | 0 |
Forbidden states | |||||
4 | 1 | 1 | 1 | 0 | 0 |
5 | 0 | 0 | 0 | 0 | 0 |
6 | 1 | 0 | 0 | Vd | 0 |
7 | 0 | 1 | 0 | 0 | 0 |
8 | 0 | 0 | 1 | 0 | 0 |
Vs | 3-Phase, 400 V, 50 Hz |
---|---|
Induction Motor | 5.4 hp, 4 pole, 400 V, 50 Hz |
Ls, Rs, mr, Fsw | 10 mH, 1.63 , 0.8, 9 kHz |
Load at PCC parallel to NSC drive | |
1-R-L | 25 , 0.1 H [0–1 s] |
2-R-L | 25 , 0.3 H [1–2 s] |
No-load | [2–3 s] |
3-R-C | 25 , 30 F [3–4 s] |
4-R-C | 25 , 60 F [4–5 s] |
[Vs = 230 V/phase, mr = 0.8] | |||||||
---|---|---|---|---|---|---|---|
ia (A) % THD | cosa | Vab1 (V) % THD | Vd (V) | QNSC (VAR) | Vxy1 (V) % THD | iL (V) % THD | |
① 0–1 s | 7.8 | 0.8 | 424.2 | 854 | −3100 | 400 | 7.8 |
4.5% | lead | 32.10% | 32.24% | 4.9 | |||
② 1–2 s | 6.72 | 0.93 | 412.3 | 830 | −1550 | 400 | 7.8 |
4.9% | lead | 32.16% | 32.24% | 4.8 | |||
No-load 2–3 s | 6.318 | 0.999 | 400 | 805 | 0 | 400 | 7.8 |
4.93% | unity | 32.16% | 31.91% | 3.8 | |||
③ 3–4 s | 6.67 | 0.95 | 388.9 | 783 | 1420 | 400 | 7.8 |
4.58% | lag | 32.01% | 31.7% | 4.0 | |||
④ 4–5 s | 7.32 | 0.86 | 380.7 | 767 | 2450 | 400 | 7.8 |
4.36% | lag | 31.97% | 31.56% | 4.89 |
Item | Specification |
---|---|
AC Source | 0–110 V |
Source Inductance | 10 mH |
IGBT | KGT25N120NDH |
Gate driver IC | MIC4425 |
DSP | dsPIC33EP512MU810 |
Software | MPLAB X IDE v2.10 |
Sensors | LV-20P, LA-25P |
Induction Motor | 1 hp, 4 Pole,110 V, 50 Hz |
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Jibhakate, C.; Chaudhari, M.; Renge, M. A Reduced Switch AC-AC Converter with the Application of D-STATCOM and Induction Motor Drive. Electronics 2018, 7, 110. https://doi.org/10.3390/electronics7070110
Jibhakate C, Chaudhari M, Renge M. A Reduced Switch AC-AC Converter with the Application of D-STATCOM and Induction Motor Drive. Electronics. 2018; 7(7):110. https://doi.org/10.3390/electronics7070110
Chicago/Turabian StyleJibhakate, Chaitanya, Madhuri Chaudhari, and Mohan Renge. 2018. "A Reduced Switch AC-AC Converter with the Application of D-STATCOM and Induction Motor Drive" Electronics 7, no. 7: 110. https://doi.org/10.3390/electronics7070110