Voltage control challenges on weak grids with high penetration of wind generation: ERCOT experience

Huang, Shun-Hsien; Schmall, John; Conto, J.M. De; Adams, Jeffrey A.; Zhang, Yang; Carter, C.

doi:10.1109/pesgm.2012.6344713

Cited by 73 publications

(28 citation statements)

References 8 publications

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“…Historically, grid strength has been used almost exclusively for determining the robustness of a network connection point, with SCR implemented as the main measure [5]. Determined by the ratio of short circuit power delivered during threephase faults to the nominal power available, the SCR is a good measure of responsiveness to dynamic system events [8]. In a traditional network, the lower the SCR, the higher the impedance of the network and increased susceptibility to voltage deviation is observed.…”

Section: An Overview Of Grid Strengthmentioning

confidence: 99%

Exploring an Impedance-Based SCR for Accurate Representation of Grid-Forming Converters

Henderson

Egea‐Àlvarez

Papadopoulos

et al. 2022

2022 IEEE Power &Amp; Energy Society General Meeting (PESGM)

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The strength of an electrical network connection point is often characterized by the short circuit ratio. Analysis of the fault current contribution at the node can provide information on system impedance, voltage stability, maximum power transfer and system recovery time. However, the introduction of more power converter connected generation decreases the validity of the current short circuit ratio definition. Mainly, the parameters that determine the strength of a connection point cannot be inferred from the fault level contribution. This article presents a discussion on the pitfalls of quantifying the strength of an electrical network using fault current contribution. The limitations of the method for converter dominated networks are presented and alternative definitions from literature are discussed with drawbacks explored. Further considerations for a new index are described, and the article suggests utilizing system impedances for investigation of different stability components. Varying converter control algorithms are explored in terms of impedance, both grid-following and grid-forming. Gridforming structures without a current loop were found to provide the greatest improvement in voltage stiffness.

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Section: An Overview Of Grid Strengthmentioning

confidence: 99%

Exploring an Impedance-Based SCR for Accurate Representation of Grid-Forming Converters

Henderson

Egea‐Àlvarez

Papadopoulos

et al. 2022

2022 IEEE Power &Amp; Energy Society General Meeting (PESGM)

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“…The method of Site Dependent Short Circuit Ratio (SDSCR) estimates strength of the system at every meeting point of grid by evaluating the structural properties of the power grid and the relation that exists between constant voltage stability and robustness of the system. This method considers the impact of interactions among various inverter-based resources that are located at divergent sites with regard to the actual electrical connection that exists among these resources employing inverters (Huang et al, 2012; Javadi, 2017). The SDSCR estimates the strength of the system at every point of inverter-based resources interconnection.…”

Section: Evaluation Of System Strengthmentioning

confidence: 99%

A comprehensive review on the advances in renewable wind power technology

2022

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In recent years, renewable energy generation, storage, and transmission has been the focus of research. Extraction of power from renewable energy sources is increasing rapidly. Progressively more wind farms are being fastened to the power grid. Large-scale merging of wind farms into electrical power grid presents a few challenges like voltage stability, system operation and control, and power quality due to usage of power electronic converters presenting a major bottleneck. This paper elucidates various types of wind power plant technologies, consequences of power electronic converters and reviews various types of system strength determination methods.

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“…In the o c interval, FRTS limits i cd to I cdF and i cq to 0. From (2), P c is U s I cdF and Q c is 0. Substituting them into (7), U s can be obtained as shown in (13)…”

Section: β4 No Intersection Points Of U S -P S Curve and U S -P C mentioning

confidence: 99%

“…With the wide use of HVDC and flexible AC transmission, large-scale integration of renewable energy, and development of electric vehicles and variable-frequency loads, power electronic equipment are increasing as parts of power sources, transmission, and loads. There is a new tendency of power electronics in power system development [1][2][3]. In this tendency, the post-fault behaviour of the power system is undergoing profound changes that have resulted in many new stability issues such as the oscillation problem caused by large-scale integration of renewable energy sources, and strong DC and weak AC problems caused by large capacity HVDC transmission [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Behavioural mechanism and stability control of VSC–HVDC/weak AC hybrid grid after large disturbances

Zhang

Zheng

Tang

et al. 2020

IET Generation, Transmission & Distribution

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Voltage control challenges on weak grids with high penetration of wind generation: ERCOT experience

Cited by 73 publications

References 8 publications

Exploring an Impedance-Based SCR for Accurate Representation of Grid-Forming Converters

Exploring an Impedance-Based SCR for Accurate Representation of Grid-Forming Converters

A comprehensive review on the advances in renewable wind power technology

Behavioural mechanism and stability control of VSC–HVDC/weak AC hybrid grid after large disturbances

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