Transient Frequency Stability Emergency Control for the Power System Interconnected With Offshore Wind Power Through VSC-HVDC

Xue, Ancheng; Zhang, Jiahuan; Zhang, Lijun; Sun, Yikai; Cui, Jiehao; Wang, Jiawei

doi:10.1109/access.2020.2981614

Cited by 29 publications

(18 citation statements)

References 12 publications

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“…Apply (14)–(19) to (6), (11) and (12) respectively, so that the expressions of synchronous generator terminal phase‐A voltage, rectifier terminal phase‐A current and AC line rectifier‐side phase‐A current can be obtained, as shown in (20)–(22).

u_{G a} = (K_{14} + K_{15} M_{2}) \sin ω t - K_{15} M_{1} \cos ω t

\begin{matrix} left i_{R a} = 0true \frac{(3 + \sqrt{3}) k_{R}}{3 (K_{2}^{2} + D^{2} R^{2})} ({}, \begin{matrix} [K_{1} D R + K_{2} K_{4} (M_{2} D R - K_{2} M_{1})] \sin ω t \\ - [K_{3} + K_{2} K_{4} (M_{1} D R + K_{2} M_{2})] \cos ω t \end{matrix}) \end{matrix}

i_{A C a} = (K_{12} - K_{13} M_{1}) \sin ω t + (K_{11} - K_{13} M_{2}) \cos ω t

…”

Section: Dynamic Energy Of Ac/dc Inter‐connected Systemmentioning

confidence: 99%

Calculation of the transient stability boundary of AC/DC inter‐connected system based on the stability margin of dynamic energy

Zhang

Shao

et al. 2021

IET Generation Trans & Dist

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Concerning the transient power angle stability problem in AC/DC inter‐connected system caused by DC line grounding fault, a transient stability analysis method based on the stability margin of dynamic energy is proposed. First, the analytical expressions of the dynamic energy function before alpha retard, during alpha retard and after alpha retard are derived. According to the topologies of system and the integration intervals of energy function in different stages, the expressions of the acceleration energy, position energy and margin energy are obtained, which, respectively, reflect the rotating speed of system, the swing range of power angle and the system's ability of resisting in stability. Then, the surplus energy in the system is calculated by subtracting the sum of the acceleration energy and position energy from the margin energy, and the stability margin of the system is obtained. And then, the stability boundary of the system is derived. It is revealed that, if the stability margin is exactly right 0 at the end moment of alpha retard, the system is critical stable. Finally, hardware‐in‐the‐loop tests are conducted in RT‐LAB platform. The simulation results verify that, the stability margin reaches the minimal value at the end moment of alpha retard, and this value can clearly reflect the stability of system. Besides, the earlier the alpha retard starts or the longer the distance between the fault point and the rectifier outlet is, the better it is for the stability of system.

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u_{G a} = (K_{14} + K_{15} M_{2}) \sin ω t - K_{15} M_{1} \cos ω t

\begin{matrix} left i_{R a} = 0true \frac{(3 + \sqrt{3}) k_{R}}{3 (K_{2}^{2} + D^{2} R^{2})} ({}, \begin{matrix} [K_{1} D R + K_{2} K_{4} (M_{2} D R - K_{2} M_{1})] \sin ω t \\ - [K_{3} + K_{2} K_{4} (M_{1} D R + K_{2} M_{2})] \cos ω t \end{matrix}) \end{matrix}

i_{A C a} = (K_{12} - K_{13} M_{1}) \sin ω t + (K_{11} - K_{13} M_{2}) \cos ω t

…”

Section: Dynamic Energy Of Ac/dc Inter‐connected Systemmentioning

confidence: 99%

Calculation of the transient stability boundary of AC/DC inter‐connected system based on the stability margin of dynamic energy

Zhang

Shao

et al. 2021

IET Generation Trans & Dist

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“…The VSC-HVDC system is most suitable for multi-terminal DC grids. It is also best suited for wind integration into the utility grid [61,62]. The VSC-HVDC system consists of two voltage source converters (VSCs) connected back-to-back through a common DC link.…”

Section: Vsc-hvdc Technologymentioning

confidence: 99%

Electric Power Network Interconnection: A Review on Current Status, Future Prospects and Research Direction

Imdadullah¹,

Alamri

et al. 2021

Electronics

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An interconnection of electric power networks enables decarbonization of the electricity system by harnessing and sharing large amounts of renewable energy. The highest potential renewable energy areas are often far from load centers, integrated through long-distance transmission interconnections. The transmission interconnection mitigates the variability of renewable energy sources by importing and exporting electricity between neighbouring regions. This paper presents an overview of regional and global energy consumption trends by use of fuel. A large power grid interconnection, including renewable energy and its integration into the utility grid, and globally existing large power grid interconnections are also presented. The technologies used for power grid interconnections include HVAC, HVDC (including LCC, VSC comprising of MMC-VSC, HVDC light), VFT, and newly proposed FASAL are discussed with their potential projects. Future trends of grid interconnection, including clean energy initiatives and developments, UHV AC and DC transmission systems, and smart grid developments, are presented in detail. A review of regional and global initiatives in the context of a sustainable future by implementing electric energy interconnections is presented. It presents the associated challenges and benefits of globally interconnected power grids and intercontinental interconnectors. Finally, in this paper, research directions in clean and sustainable energy, smart grid, UHV transmission systems that facilitate the global future grid interconnection goal are addressed.

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“…In several works, it is reported to address the issues of PQ in OWPP using simulation studies [12], [13] as well as through hardware approaches [14], [15]. With regards to stability of OWPP connected to the grid, different aspects that are reported in studies include; steady state frequency control [16], damping control [17], voltage control [18] as well as transient stability control [19].…”

Section: Introductionmentioning

confidence: 99%

Offshore Wind Farm-Grid Integration: A Review on Infrastructure, Challenges, and Grid Solutions

et al. 2021

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Recently, the penetration of renewable energy sources (RESs) into electrical power systems is witnessing a large attention due to their inexhaustibility, environmental benefits, storage capabilities, lower maintenance and stronger economy, etc. Among these RESs, offshore wind power plants (OWPP) are ones of the most widespread power plants that have emerged with regard to being competitive with other energy technologies. However, the application of power electronic converters (PECs), offshore transmission lines and large substation transformers result in considerable power quality (PQ) issues in grid connected OWPP. Moreover, due to the installation of filters for each OWPP, some other challenges such as voltage and frequency stability arise. In this regard, various customs power devices along with integration control methodologies have been implemented to deal with stated issues. Furthermore, for a smooth and reliable operation of the system, each country established various grid codes. Although various mitigation schemes and related standards for OWPP are documented separately, a comprehensive review covering these aspects has not yet addressed in the literature. The objective of this study is to compare and relate prior as well as latest developments on PQ and stability challenges and their solutions. Low voltage ride through (LVRT) schemes and associated grid codes prevalent for the interconnection of OWPP based power grid have been deliberated. In addition, various PQ issues and mitigation options such as FACTS based filters, DFIG based adaptive and conventional control algorithms, ESS based methods and LVRT requirements have been summarized and compared. Finally, recommendations and future trends for PQ improvement are highlighted at the end.INDEX TERMS Frequency control, Grid codes, harmonics, LVRT, offshore wind energy, power quality, stability, voltage control.

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Transient Frequency Stability Emergency Control for the Power System Interconnected With Offshore Wind Power Through VSC-HVDC

Cited by 29 publications

References 12 publications

Calculation of the transient stability boundary of AC/DC inter‐connected system based on the stability margin of dynamic energy

Calculation of the transient stability boundary of AC/DC inter‐connected system based on the stability margin of dynamic energy

Electric Power Network Interconnection: A Review on Current Status, Future Prospects and Research Direction

Offshore Wind Farm-Grid Integration: A Review on Infrastructure, Challenges, and Grid Solutions

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