Modeling and Stability Analysis of Hybrid PV/Diesel/ESS in Ship Power System
Abstract
:1. Introduction
- high energy density and long working lifecycle;
- fast response to smooth the frequency fluctuations;
- high efficiency with a lower loss;
- flexible for an application as a decentralized power supply unit;
- wide operating temperature range, and so on.
2. Hybrid Ship Power System Configuration and Components
2.1. Hybrid Ship Power System Structure
2.2. Models of System Components
2.2.1. PV Generation System
(1) Solar Irradiation Simulation
(2) PV Model
2.2.2. Diesel Generator
2.2.3. Flywheel Energy Storage System
2.2.4. Converter
2.2.5. Loads
3. Control Strategy for the Hybrid Ship Power System
3.1. Maximum Power Point Tracking Algorithm
3.2. P-Q Decoupled Control Strategy
3.3. Constant Torque Angle Control Method
4. Simulation Analysis
- First Case: Stability analysis considering PV connection and ship load fluctuations;
- Second Case: Stability analysis considering ship rolling;
- Third Case: Stability analysis considering the sudden changes of solar irradiation.
5. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
Symbols and Abbreviations
PV | Photovoltaic |
ESS | energy storage system |
FESS | Flywheel energy storage system |
SPWM | Sinusoidal pulse width modulation |
MARPOL | Marine Agreement Regarding Oil Pollution of Liability |
PMSM | Permanent Magnet Synchronous Motor |
SOC | State of charge |
MPPT | Maximum power point tracking |
DQ | Direct-axis and Quadrature-axis |
PQ | Active power and reactive power |
PWM | pulse width modulation |
DC | direct current |
Ipv, Vpv | PV array output current and voltage |
T | Duty cycle |
Vref | excitation voltage reference per-unit value |
If, Ef | excitation current and voltage |
W | diesel generator speed per-unit value |
Wref | diesel generator speed reference |
FL | the engine fuel intake |
Tm | the engine output shaft torque per-unit value |
J | the moment of inertia of flywheel rotor |
ω | the angular speed of flywheel or system angular frequency |
usd, usq | direct-axis and quadrature-axis voltage of stator winding |
isd, isq | direct-axis and quadrature-axis current of stator winding |
ψsd, ψsq | direct-axis and quadrature-axis flux linkage of stator winding |
Ld, Lq | direct-axis and quadrature-axis inductance of stator winding |
ωr | angular speed of rotor |
Rs | resistance of stator |
ψf | flux linkage of rotor |
np | pairs of pole |
Te | the electromagnetic torque of rotor |
Ia, Ib, Ic | phase current |
Vabc | phase to ground voltage |
Vmppt | the maximum power point tracking voltage |
θ | system voltage phase angle or rotor position of PMSM |
L | inductance of grid-connected inverter |
Xd, Xq | direct-axis and quadrature-axis reactance of PMSM |
ψ | Magnetic strength of PMSM |
References and Notes
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MPPT Control | PI | SPWM | |||
---|---|---|---|---|---|
Open-circuit voltage | Short-circuit current | Sampling interval | P | I | Frequency |
450 V | 847 A | 0.001 s | 3 | 0.01 | 10 kHz |
LC Filter | Current Control | Voltage Control | SPWM | |||
---|---|---|---|---|---|---|
Inductance | Capacitance | P | I | P | I | Frequency |
0.5 mH | 500 uF | 50 | 0.001 | 120 | 0.001 | 12 kHz |
PMSM | Current Control | Active Power Control | ||||
---|---|---|---|---|---|---|
Rated Voltage | Rated Frequency | Moment of Inertia J | P | I | P | I |
200 V | 250 Hz | 58.824 kg*m2 | 1500 | 0.0001 | 100 | 0.001 |
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Lan, H.; Bai, Y.; Wen, S.; Yu, D.C.; Hong, Y.-Y.; Dai, J.; Cheng, P. Modeling and Stability Analysis of Hybrid PV/Diesel/ESS in Ship Power System. Inventions 2016, 1, 5. https://doi.org/10.3390/inventions1010005
Lan H, Bai Y, Wen S, Yu DC, Hong Y-Y, Dai J, Cheng P. Modeling and Stability Analysis of Hybrid PV/Diesel/ESS in Ship Power System. Inventions. 2016; 1(1):5. https://doi.org/10.3390/inventions1010005
Chicago/Turabian StyleLan, Hai, Yifei Bai, Shuli Wen, David C. Yu, Ying-Yi Hong, Jinfeng Dai, and Peng Cheng. 2016. "Modeling and Stability Analysis of Hybrid PV/Diesel/ESS in Ship Power System" Inventions 1, no. 1: 5. https://doi.org/10.3390/inventions1010005
APA StyleLan, H., Bai, Y., Wen, S., Yu, D. C., Hong, Y.-Y., Dai, J., & Cheng, P. (2016). Modeling and Stability Analysis of Hybrid PV/Diesel/ESS in Ship Power System. Inventions, 1(1), 5. https://doi.org/10.3390/inventions1010005