Integral Plus Resonant Sliding Mode Direct Power Control for VSC-HVDC Systems under Unbalanced Grid Voltage Conditions
Abstract
:1. Introduction
2. VSC-HVDC System Model
2.1. Schematic of the Studied VSC-HVDC System
2.2. Mathematical Model of the Converter Station
2.3. Instantaneous Power Flow Analysis
2.4. Power Reference Derivation
2.4.1. Obtaining Three-Phase Balanced Ac Current
2.4.2. Removing Reactive Power Ripples at the PCC
2.4.3. Removing Active Power Ripples at the PCC
2.4.4. Obtaining Continuously Controllable Active and Reactive Power Ripples at the PCC
3. IRSMC DPC Controller Design
3.1. IRSMC Control Law
3.2. Structure of the IRSMC DPC Strategy
4. Simulation Study
4.1. General Configuration
4.2. Simulation Results
5. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Parameter | Value | Parameter | Value |
---|---|---|---|
KPI, KQI | 50 | KPR, KQR | 2.5 |
KPS, KQS | 1200 | ωc | 10 |
Symbol | Meaning |
---|---|
Vdc1, Vdc2 | Dc bus voltage on CS1 and CS2 side |
E1abc, E2abc | Grid voltage on CS1 and CS2 side |
I1abc, I2abc | Ac current on CS1 and CS2 side |
P1, Q1, P2, Q2 | Active and reactive power at PCC of CS1 and CS2 |
P1ref, Q1ref, P2ref, Q2ref | Active and reactive power references to respective power control loop for CS1 and CS2 |
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Yang, W.; Zhang, A.; Li, J.; Li, G.; Zhang, H.; Wang, J. Integral Plus Resonant Sliding Mode Direct Power Control for VSC-HVDC Systems under Unbalanced Grid Voltage Conditions. Energies 2017, 10, 1528. https://doi.org/10.3390/en10101528
Yang W, Zhang A, Li J, Li G, Zhang H, Wang J. Integral Plus Resonant Sliding Mode Direct Power Control for VSC-HVDC Systems under Unbalanced Grid Voltage Conditions. Energies. 2017; 10(10):1528. https://doi.org/10.3390/en10101528
Chicago/Turabian StyleYang, Weipeng, Aimin Zhang, Jungang Li, Guoqi Li, Hang Zhang, and Jianhua Wang. 2017. "Integral Plus Resonant Sliding Mode Direct Power Control for VSC-HVDC Systems under Unbalanced Grid Voltage Conditions" Energies 10, no. 10: 1528. https://doi.org/10.3390/en10101528