An Improved Control and Energy Management Strategy of Three-Level NPC Converter Based DC Distribution Network
Abstract
:1. Introduction
2. DC Distribution Network
2.1. Proposed DC Distribution Network
2.2. The Simplified DC Distribution Network
3. Model of Three-Level NPC Converter
3.1. Voltage of AC Side
3.2. Voltage of DC Side
3.3. Voltage Equalization Problem of the DC Side
3.4. Structure of Control System
4. Improved Strategy
4.1. Voltage Equalization Control
4.2. Cooperative Control with Storage System
4.3. Energy Management Strategy of the Storage System
4.4. Two-Degree-of-Freedom Controllers
5. Verification
5.1. Test Scenario
5.2. Three-Level NPC
5.3. Traditional Control
5.4. Voltage Equalization Controller
5.5. Cooperative Control and Energy Management Strategy
5.6. Synthetic Control Results
6. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
Abbreviations
DER | Distributed Energy Resource |
NPC | Neural Point Clamped |
2DOF | 2-Degrees of Freedom |
MCU | Micro Controller Unit |
VSC | Voltage Source Converter |
RES | Renewable Energy Source |
ESS | Energy Storage System |
PWM | Pulse Width Modulation |
DSP | Digital Signal Processing |
AC | Alternating Current |
DC | Direct Current |
IGBT | Insulated Gate Bipolar Transistor |
PI | Proportional-Integral |
PID | Proportional-Integral-Derivative |
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Subsystem | Symbol | Value |
---|---|---|
Three-level NPC Control | L | 0.0936 mH |
R | 0.0042 | |
C | 1 F | |
1 | ||
20 | ||
2.5 | ||
275 | ||
Rated Voltage of DC side | 1000 V | |
Rated Voltage of DC side | 700 V(rms) | |
1.65 KHz | ||
Storage System | Initial Voltage of Battery | 1000 V |
Initial Voltage of SC | 1000 V | |
Series resistance of SOC | 0.0021 | |
Rated Capacitance of SOC | 6 F | |
Battery response time | 29 s | |
Maximum capacity of battery | 1000 Ah | |
Frequency of DC/DC converter | 2.5 KHz |
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Wang, Y.; Xu, Q.; Ma, Z.; Zhu, H. An Improved Control and Energy Management Strategy of Three-Level NPC Converter Based DC Distribution Network. Energies 2017, 10, 1635. https://doi.org/10.3390/en10101635
Wang Y, Xu Q, Ma Z, Zhu H. An Improved Control and Energy Management Strategy of Three-Level NPC Converter Based DC Distribution Network. Energies. 2017; 10(10):1635. https://doi.org/10.3390/en10101635
Chicago/Turabian StyleWang, Yuqi, Qingshan Xu, Zhoujun Ma, and Hong Zhu. 2017. "An Improved Control and Energy Management Strategy of Three-Level NPC Converter Based DC Distribution Network" Energies 10, no. 10: 1635. https://doi.org/10.3390/en10101635