Stability Analysis of an All-Electric Ship MVDC Power Distribution ...

three-PDM ISP architecture proposed for the MVDC Power
Distribution System for the All-Electric Ship. Frequency and
time domain results have validated the proposed method.
350
300
250
Vbus
Magnitude of Z bus
60
Estimation with FFFB
200
Analytical TF with FFFB
Magnitude [dB]
40
20
0
Analytical TF with FB only
Estimation with FB only
150
100
150
100
R = 10 ohm -> 20 ohm
R = 20 ohm -> 10 ohm
Vabc
FB only
FFFB
50
-20
10 1 10 2 10 3 10 4
0
Phase of Z bus
-50
100
-100
0
-150
R = 10 ohm -> 20 ohm
R = 20 ohm -> 10 ohm
0.1 0.15 0.2 0.25
Phase [deg]
-100
(a)
-200
350
Vbus
-300
10 1 10 2 10 3 10 4
Frequency [Hz]
Figure 12: Z bus estimation through PRBS injection and comparison with
analytical transfer functions for the cascade of buck converter and VSI and the
addition of a 300W CPL.
300
250
200
150
100
REFERENCES
[1] Parker, D.S.; Hodge, C.G., "The electric warship [electric propulsion],"
Power Engineering Journal, Volume: 12 Issue: 1 , Feb. 1998, Page(s): 5
-13.
[2] Clayton, D.A.; Sudhoff, S.D.; Grater, G.F., "Electric ship drive and
power system," Power Modulator Symposium, 2000. Conference
Record of the 2000 Twenty-Fourth International, 2000, Page(s): 85 -88.
[3] N. Doerry, Next Generation Integrated Power Systems, NGIPS Master
Plan, Whashington, DC: Naval Sea Systems Command, 2007.
[4] IEEE Std 1709-2010, "IEEE Recommended Practice for 1 kV to 35 kV
Medium-Voltage DC Power Systems on Ships," IEEE Std 1709-2010,
vol., no., pp.1-54, Nov. 2 2010.
[5] Emadi, A. Khaligh, C. H. Rivetta, and G. A. Williamson, "Constant
power loads and negative impedance instability in automotive systems:
definition, modeling, stability, and control of power electronic
converters and motor drives," IEEE Trans. Vehicular Technology, vol.
55, pp. 1112-1125, Jul. 2006.
[6] Y. Jang and R. W. Erickson, "Physical origins of input filter
oscillations in current programmed converters," IEEE Trans. Power
Electronics, vol. 7, no. 4, pp. 725-733, Jul. 1992.
[7] Emadi, A.; Ehsani, A.; , "Dynamics and control of multi-converter DC
power electronic systems ," Power Electronics Specialists Conference,
2001. PESC. 2001 IEEE 32nd Annual , vol.1, no., pp.248-253 vol. 1,
2001.
[8] A. Emadi, B. Fahimi, and M. Ehsani, "On the concept of negative
impedance instability in advanced aircraft power systems with constant
power loads," Society of Automotive Engineers (SAE) Journal, Paper
No. 1999-01-2545, 1999.
[9] Middlebrook, R.D., "Input Filter Considerations in Design and
Application of Switching Regulators," IEEE IAS Annual Meeting,
1976.
[10] Wildrick, C.M.; Lee, F.C.; Cho, B.H.; Choi, B.; , "A method of
defining the load impedance specification for a stable distributed power
system," Power Electronics, IEEE Transactions on , vol.10, no.3,
pp.280-285, May 1995.
[11] Xiaogang Feng; Zhihong Ye; Kun Xing; Lee, F.C.; Borojevic, D.; ,
"Impedance specification and impedance improvement for DC
distributed power system," Power Electronics Specialists Conference,
1999. PESC 99. 30th Annual IEEE , vol.2, no., pp.889-894 vol.2, 1999.
50
150
100
50
0
-50
-100
-150
240
220
200
180
160
150
100
50
0
-50
-100
-150
300
250
200
150
100
50
0
Vref = 90 Vpk -> 45 Vpk
Vref = 90 Vpk -> 45 Vpk
Vref = 45 Vpk -> 90 Vpk
0.1 0.15 0.2 0.25
Vabc
Vref = 45 Vpk -> 90 Vpk
(b)
Vbus
Vabc
P_CPL
0.05 0.1 0.15 0.2 0.25
(c)
Figure 13: Time-domain results for the cascade of buck converter and VSI
with the addition of a 300W CPL connected to the bus. Comparison of FB
only and FFFB in correspondence to (a) balanced resistive step applied to the
VSI, (b) voltage reference step applied to the VSI, and (c) CPL power step.
FB only
FFFB
FB only
FFFB
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