LCC-HVDC Frequency Robust Control Strategy Based on System Parameter Identification in Islanded Operation Mode
Abstract
:1. Introduction
- The establishment of the low-order linearization model of the system in this paper is achieved through the SDM-Prony algorithm. Subsequently, robust control is proposed based on linear matrix inequality (LMI).
- Robustness issues and solutions for optimizing controller performance are proposed through the adoption of regional pole placement methods.
- The proposed supplementary frequency robust controller significantly reduces system frequency fluctuations, improves system frequency stability, and has superior control effects and higher robustness.
2. Control Framework of DC Transmission Systems with Additional Frequency Control
2.1. HVDC System with Frequency Control
2.2. Robust Control Theory
- (1)
- H∞ performance.
- (2)
- H2 performance.
- (3)
- Region-based pole location.
- (4)
- Multi-objective control.
3. Island Model Identification Based on the SDM-Prony Algorithm
3.1. The SDM-Prony Identification Algorithm
3.2. Identification of Island Simulation Models
4. The Design of Supplementary Frequency Robust Controllers
4.1. The Design of the Controller
4.2. The Design of the Supplementary Frequency Robust Controller
5. Simulation Verification
5.1. Control Performance Verification
5.2. Robustness Validation
5.3. Validation of Control Efficacy during Resilient Network Operation
6. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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No Control | PI Control | Robust Control | |
---|---|---|---|
Disturbance 1 | >20 s | 10 s | 6 s |
Disturbance 2 | >20 s | 10 s | 5 s |
Disturbance 1 | 0.71 Hz | 0.81 Hz | 0.76 Hz |
Disturbance 2 | 0.76 Hz | 0.81 Hz | 0.51 Hz |
No Control | PI Control | Robust Control | |
---|---|---|---|
Disturbance 3 | >20 s | >20 s | 6 s |
Disturbance 4 | >20 s | >20 s | 6 s |
Disturbance 3 | 0.51 Hz | 0.61 Hz | 0.53 Hz |
Disturbance 4 | 0.51 Hz | 0.51 Hz | 0.5 Hz |
No Control | PI Control | Robust Control | |
---|---|---|---|
Disturbance 5 | 12 s | 10 s | 7 s |
Disturbance 6 | 14 s | 12 s | 6 s |
Disturbance 5 | 1.01 Hz | 0.98 Hz | 1.15 Hz |
Disturbance 6 | 1.21 Hz | 1.25 Hz | 1.3 Hz |
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Xing, C.; Liu, M.; Peng, J.; Wang, Y.; Liao, J.; Zheng, Z.; Gao, S.; Guo, C. LCC-HVDC Frequency Robust Control Strategy Based on System Parameter Identification in Islanded Operation Mode. Electronics 2024, 13, 951. https://doi.org/10.3390/electronics13050951
Xing C, Liu M, Peng J, Wang Y, Liao J, Zheng Z, Gao S, Guo C. LCC-HVDC Frequency Robust Control Strategy Based on System Parameter Identification in Islanded Operation Mode. Electronics. 2024; 13(5):951. https://doi.org/10.3390/electronics13050951
Chicago/Turabian StyleXing, Chao, Mingqun Liu, Junzhen Peng, Yuhong Wang, Jianquan Liao, Zongsheng Zheng, Shilin Gao, and Chunsheng Guo. 2024. "LCC-HVDC Frequency Robust Control Strategy Based on System Parameter Identification in Islanded Operation Mode" Electronics 13, no. 5: 951. https://doi.org/10.3390/electronics13050951