Operating Wind Power Plants Under Weak Grid Conditions Considering Voltage Stability Constraints

Lund, Torsten; Wu, Heng; Soltani, Hamid; Nielsen, J.G.; Andersen, Gert Karmisholt; Wang, Xiongfei

doi:10.1109/tpel.2022.3197308

Cited by 16 publications

(9 citation statements)

References 14 publications

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“…These two curve changes are a consequence of effectively reduced infeed power and increased short-circuit capacity, respectively. Similar effects can be seen for varying X/R ratios and operating voltage [18]. These important differences are not always captured by SCR-based methods presented in Section II.…”

Section: ) Operating Voltage and Secondary Short-circuit Supportmentioning

confidence: 56%

“…Methods presented in Section II generally do not consider the effects of the different X/R ratios on the stability limits. This simplification may affect the accuracy of the SCR-related metrics, particularly in weaker grids, as shown in [17,18].…”

Section: ) Grid Equivalence X/r Ratiomentioning

confidence: 99%

“…A novel method introduced in [17,18] addresses some of the mentioned challenges by calculating voltage sensitivity ∂Q/∂|V| as a system strength metric. Detailed mathematical derivation is intricate and hereby omitted for brevity.…”

Section: ) Operating Voltage and Secondary Short-circuit Supportmentioning

confidence: 99%

“…Detailed mathematical derivation is intricate and hereby omitted for brevity. Figure 3 shows how ∂Q/∂|V| visualizes system strength and the distance to voltage instability [17,18]. For low active power with no load, ∂Q/∂|V| ≈ SCR, while ∂Q/∂|V| = 0 indicates voltage stability limit [2].…”

Section: ) Operating Voltage and Secondary Short-circuit Supportmentioning

confidence: 99%

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System Strength: Classification, Evaluation Methods, and Emerging Challenges in IBR-dominated Grids

Borićič

Torres

Popov

2022

2022 IEEE PES Innovative Smart Grid Technologies - Asia (ISGT Asia)

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To facilitate the increasing penetration of inverterbased resources, understanding and evaluating system strength becomes one of the central questions for the resilient operation of power systems. However, this is a very challenging and nuanced task, currently without a clear consensus in the industry and academia. This paper provides a comprehensive review of the proposed notion for system strength, followed by a consequent introduction of a novel classification. Furthermore, an exhaustive examination of present system strength evaluation methods is performed. Finally, a critical outlook on remaining and emerging challenges of system strength evaluation is presented, with several key recommendations for future research directions.

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Section: ) Operating Voltage and Secondary Short-circuit Supportmentioning

confidence: 56%

Section: ) Grid Equivalence X/r Ratiomentioning

confidence: 99%

Section: ) Operating Voltage and Secondary Short-circuit Supportmentioning

confidence: 99%

Section: ) Operating Voltage and Secondary Short-circuit Supportmentioning

confidence: 99%

See 2 more Smart Citations

System Strength: Classification, Evaluation Methods, and Emerging Challenges in IBR-dominated Grids

Borićič

Torres

Popov

2022

2022 IEEE PES Innovative Smart Grid Technologies - Asia (ISGT Asia)

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“…However, SCR is merely a convenient simplification of system strength. Recent research highlights some of its main drawbacks, particularly for the analysis of weaker grids [9,[14][15]. New methods to tackle these challenges emerge, such as voltage sensitivity [15], generalized SCR [16], and many more, with an overview in [9,14].…”

Section: Introductionmentioning

confidence: 99%

Beyond SCR in Weak Grids: Analytical Evaluation of Voltage Stability and Excess System Strength

Borićič

Torres

Popov

2023

2023 International Conference on Future Energy Solutions (FES)

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Due to the continuous increase (decrease) in the number of inverter-based (synchronous) generators in modern electrical power systems, the theoretical foundations behind widely used system strength and voltage stability assessment methods require thorough revision. The existing evaluation methods such as the Short-Circuit Ratio (SCR) are often based on simplifications which may produce inaccuracies, particularly when studying weak systems. As a result, a misleading estimation of voltage stability can occur, exposing systems to unnecessary renewables curtailment or other inappropriate remedial actions that may cause partial disruptions or potential instability. This paper provides a rigorous analytical revision of voltage stability assessment to confidently evaluate the maximum power transfer under various operating conditions. Subsequently, the proposed approach is applied as an enhanced method of system strength evaluation. The method is extensively tested on a single-machineinfinite-bus test system. Numerical results show a notably more accurate assessment relative to the common alternative methods.

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Screening Methods as Preliminary Calculations to Determine the Level and Type of Dynamic Modeling Required

Badrzadeh,

Val Escudero,

Liao

et al. 2024

CIGRE Green Books

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Operating Wind Power Plants Under Weak Grid Conditions Considering Voltage Stability Constraints

Cited by 16 publications

References 14 publications

System Strength: Classification, Evaluation Methods, and Emerging Challenges in IBR-dominated Grids

System Strength: Classification, Evaluation Methods, and Emerging Challenges in IBR-dominated Grids

Beyond SCR in Weak Grids: Analytical Evaluation of Voltage Stability and Excess System Strength

Screening Methods as Preliminary Calculations to Determine the Level and Type of Dynamic Modeling Required

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