Investigation on Economic and Reliable Operation of Meshed MTDC/AC Grid as Impacted by Offshore Wind Farms

Bu, Siqi; Wei, Du; Wang, H. F.; Liu, Y.; Liu, Xueqin

doi:10.1109/tpwrs.2016.2636181

Cited by 26 publications

(19 citation statements)

References 22 publications

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“…W ITH the rapid development of semiconductor devices, multi-terminal high voltage direct current (MTDC) systems based on voltage source converter (VSC) technology have become more and more attractive. Due to their flexibility and controllability, such systems are particularly applicable to the integration of scattered renewable energy sources, such as offshore wind farms, solar plants etc, to the mainland grids [1], [2], [3], [4], [5]. Taking physical considerations into account, the operation range of MTDC systems is limited by the DC voltage which must be kept within a narrow domain of operation [6], [7].…”

Section: Introductionmentioning

confidence: 99%

Control-Induced Time-Scale Separation for Multiterminal High-Voltage Direct Current Systems Using Droop Control

Chen

Carrizosa

Damm

et al. 2020

IEEE Trans. Contr. Syst. Technol.

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This paper introduces a control induced timescale separation scheme for a multi-terminal high voltage direct current system, used for large scale integration of renewable energy sources. The main idea is to provide a detailed theoretical analysis, to the long stand practice that consists of empirical design of two control loops for the terminals. Experience has shown that such loops, i.e. current and voltage control loop, when heuristically tuned, often display very different dynamics. In the present paper, singular perturbation theory is applied to give explanation and fundamental analysis on why and how the two control loops work, and how to achieve the timescale separation between various state variables. Mathematical analysis is also carried out to illustrate a clear trade-off between system performance (actuator constraint) and the size of the region of attraction of the controller. Numerical simulations for a system with four terminals are presented to evaluate the system performance and illustrate the theoretical analysis.

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Section: Introductionmentioning

confidence: 99%

Control-Induced Time-Scale Separation for Multiterminal High-Voltage Direct Current Systems Using Droop Control

Chen

Carrizosa

Damm

et al. 2020

IEEE Trans. Contr. Syst. Technol.

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“…The economic and reliable MTDC operations have been surveyed in Ref. [13]. The N-1 criterion of power systems has been included in the OPF in mixed AC/VSC HVDC systems in Refs [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

A novel economic analysis on multiterminal VSC HVDC systems with wind farms by hierarchical small‐signal stability constrained OPF

Kim

Yokoyama

Takaguchi

et al. 2020

IEEJ Transactions Elec Engng

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In this paper, a novel economic analysis for multiterminal voltage‐source converter high‐voltage direct current (MTDC) systems with wind farms is developed. Both the reinforcement and operation methods of an MTDC system are determined hierarchically in the proposed approach. Based on these methods, not only wind power transmission but also the MTDC system is capable of contributing to the power transmission among alternating current (AC) grids in cases of low wind power production cases. As a consequence, the economic benefits produced by the MTDC system can be increased. This paper also focuses on the sensitivity analysis of small‐signal stability constraints on the developed approach. It is demonstrated that the system for wind power transmission without any MTDC systems is exposed to instability, which is solved by the proposed method. On top of that, the small‐signal stability improvement effect of the MTDC system is analyzed from the economic viewpoint. Under strict small‐signal stability constraints, the economic benefits obtained by the MTDC system increase. © 2020 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

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“…. The discussions on both economics and reliability of power systems with VSC‐HVDC systems were also carried out in Refs . The economic efficiencies of multiterminal VSC‐HVDC (MTDC) systems for offshore wind farms were surveyed in Refs .…”

Section: Introductionmentioning

confidence: 99%

Small‐signal stability‐constrained optimal power flow analysis of multiterminal VSC‐HVDC systems with large‐scale wind farms

Kim

Yokoyama

Takaguchi

et al. 2019

IEEJ Transactions Elec Engng

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As a solution for the large‐scale wind power transmission in a power system model in East Japan, multiterminal VSC‐HVDC systems are proposed to be installed in the system model. To evaluate the effectiveness of the systems, small‐signal stability‐constrained optimal power flow (SSSC‐OPF) analysis in mixed AC/multiterminal VSC‐HVDC systems is developed. It is revealed by SSSC‐OPF analysis that the system reinforced only by an AC system is exposed to unstable operations. In contrast, mixed AC/multiterminal VSC‐HVDC systems do not suffer from such unstable system operations. On top of that, the differences in multiterminal VSC‐HVDC systems with different configurations are also discussed. Different annual fuel costs and wind power hosting capacity results are obtained due to AC transmission line capacities and interarea oscillation modes. The best multiterminal VSC‐HVDC system among all simulated multiterminal VSC‐HVDC systems is also concluded. © 2019 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

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Investigation on Economic and Reliable Operation of Meshed MTDC/AC Grid as Impacted by Offshore Wind Farms

Cited by 26 publications

References 22 publications

Control-Induced Time-Scale Separation for Multiterminal High-Voltage Direct Current Systems Using Droop Control

Control-Induced Time-Scale Separation for Multiterminal High-Voltage Direct Current Systems Using Droop Control

A novel economic analysis on multiterminal VSC HVDC systems with wind farms by hierarchical small‐signal stability constrained OPF

Small‐signal stability‐constrained optimal power flow analysis of multiterminal VSC‐HVDC systems with large‐scale wind farms

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