A robust control strategy to improve transient stability for AC-DC interconnected power system with wind farms
| Autor: | Yan Li, Xia Yang, Zhe Chen, Jinlu Yang, Qian Hui, Yun Teng |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
transient stability
Computer science 0211 other engineering and technologies 02 engineering and technology 010501 environmental sciences 01 natural sciences Transfer function lcsh:Technology Electric power system Transient analysis linear parameter varying Control theory Interconnected systems Torque 021108 energy Electrical and Electronic Engineering 0105 earth and related environmental sciences Wind power business.industry lcsh:T sending-end system Stability analysis Thermal stability Power system stability interconnected power systems lcsh:QC1-999 Electronic Optical and Magnetic Materials AC/DC transmission General Energy Electronic stability control Transient (oscillation) wind power generation Robust control business robust control lcsh:Physics |
| Zdroj: | CSEE Journal of Power and Energy Systems, Vol 5, Iss 2, Pp 259-265 (2019) Hui, Q, Yang, J, Yang, X, Chen, Z, Li, Y & Teng, Y 2019, ' A robust control strategy to improve transient stability for AC-DC interconnected power system with wind farms ', CSEE Journal of Power and Energy Systems, vol. 5, no. 2, pp. 259-265 . https://doi.org/10.17775/CSEEJPES.2019.00250 |
| ISSN: | 2096-0042 |
| DOI: | 10.17775/CSEEJPES.2019.00250 |
| Popis: | In view of the variable parameters that affect the transient stability of electromagnetic torque and mechanical torque balance in AC-DC system, and the uncertainty of wind power in large-scale interconnection of wind farm. This paper proposes a linear parameter varying (LPV) robust feedback control method for transient stability of interconnected systems. The proposed LPV robust feedback control method uses the DC channel power control and the mechanical power in the interconnected system as the control target to improve the transient stability of the interconnected system with wind farm channel. Firstly, aiming at the strong nonlinear characteristics of the interconnected system, the power balance and the wind power output uncertainty in the transient process, the transient process is designed as a linear model of variable parameters. Then, the H∞ robust output feedback controller is designed according to the LPV model. The transient stability control strategy topology and transfer function of the interconnected system are proposed. Finally, the proposed scheme is verified by an interconnected system formed by four equal-value grids through AC and DC lines in a digital simulation platform. The results show that the LPV robust feedback control model proposed in this paper has better response characteristics and transient stability control effects for interconnected systems with wind power weak sending-end system. |
| Databáze: | OpenAIRE |
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