Security-Constrained Unit Commitment Considering Locational Frequency Stability in Low-Inertia Power Grids

Tuo, Mingjian; Li, Xingpeng

doi:10.1109/tpwrs.2022.3215915

Cited by 20 publications

(5 citation statements)

References 31 publications

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“…In comparing existing frequency stability indices to those proposed in this paper, it is important to recognize that the existing indices often rely on the measurement of the frequency nadir and the RoCoF following a particular disturbance event [17,20,23,24]. These existing indices offer valuable insights into how grid frequency behavior is influenced by the reduced inertia that comes with increased uptake of RESs, as discussed in Section 6.3.…”

Section: Evaluation Of Proposed Stability Indicesmentioning

confidence: 99%

“…In [16], challenges and solutions related to frequency control in modern power systems with a significant presence of wind energy conversion systems are reviewed. [17] introduces a location-based Rate of Change of Frequency (RoCoF) constrained security-constrained unit commitment model. The study in [18], transient stability in low-inertia power systems with inverter-based generation is investigated, and a novel stability criterion is introduced.…”

Section: Introductionmentioning

confidence: 99%

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Assessment and management of frequency stability in low inertia renewable energy rich power grids

Saleem,

Saha,

Roy

et al. 2024

IET Generation Trans & Dist

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The integration of the renewable energy sources (RESs) into the power grid, drives a significant transformation in the conventional power generation landscape. This transition from traditional synchronous generators to inverter based RESs introduces unique challenges in maintaining the grid frequency stability due to the reduced system inertia. The inherent stochastic nature of the RES power generation, load demand, and grid inertia includes further complexity in the assessment of frequency stability. Existing studies have limitations, including neglecting the stochastic nature of RES generation and load demand fluctuations, relying on limited metrics, and lacking a comprehensive day‐to‐day assessment. To address these shortcomings of the existing approaches, this paper introduces a novel methodology for assessing frequency stability in power grids with high RES penetration. It proposes three indices for evaluating grid frequency sensitivity, resiliency, and permissibility amidst varying RES integration. Utilizing a stochastic approach, the study incorporates uncertainties in RES generation and load demand, offering a comprehensive framework for day‐to‐day frequency stability analysis. Additionally, it presents a systematic method to ascertain the necessary inertial support for maintaining desired frequency reliability in RES‐dominated grids. The effectiveness of these methodologies is validated through a case study on a modified IEEE 39‐bus test system, demonstrating their applicability in ensuring reliable grid operation under high RES scenarios.

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Section: Evaluation Of Proposed Stability Indicesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Assessment and management of frequency stability in low inertia renewable energy rich power grids

Saleem,

Saha,

Roy

et al. 2024

IET Generation Trans & Dist

View full text Add to dashboard Cite

show abstract

“…• Step 2: From the initial conditions, the internal voltage of synchronous generators (E i ̸ δ i0 ) is calculated using (17), i = 1, . .…”

Section: B Proposed Inertia Distribution Formulationmentioning

confidence: 99%

“…However, these methodologies are employed in real-time operations and may not be helpful for power system operation planning that strongly relies on power system models. Thus, there is a clear need to develop analytical methodologies to identify and quantify the locational lack of inertial resources in modern power systems, thereby improving the operation planning process and addressing problems such as optimal generation scheduling [16], [17] and allocation of inertial sources [18], [19].…”

Section: Introduction a Motivationmentioning

confidence: 99%

An Analytical Formulation for Mapping the Spatial Distribution of Nodal Inertia in Power Systems

et al. 2023

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Mapping the spatial distribution of nodal inertia is crucial for helping system operators identify locational frequency stability issues in the power system operation planning process. Currently, index-based methods cannot retrieve the nodal inertia values for all load buses. To do so, this paper proposes an accurate analytical formulation relying only on steady-state system parameters to determine the nodal inertia values and, thus, map the spatial distribution of system inertia. The performance and reproducibility of the proposed formulation are evaluated using three test systems: a 5-bus radial system with two synchronous generators, a multimachine IEEE 68-bus benchmark system, and a larger NPCC 140-bus test system. We validate the proposed spatial distribution of nodal inertia using time-domain simulations and numerical estimations. In addition, we compare our method against the inertia distribution indexes presented in the literature. The results indicate that our formulation adequately quantifies the nodal inertia value in system buses, with low computational cost, and providing a suitable tool for operation planning analysis.

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“…To achieve this purpose, it is necessary to develop system stability constraints, which can be further incorporated into system level optimizations. Although some work has been done on the system level to address stability issues such as [30]- [32] on frequency and [33]- [35] on voltage stability, only a specific stability issue is studied and the interactions among different stability are not investigated due to the complicated dynamics of different stability phenomena. There still lacks a unified stability constrained optimization framework in power system which can simultaneously incorporate various stability constraints in high IBR-penetrated system.…”

Section: Introductionmentioning

confidence: 99%

Short Circuit Current Constrained UC in High IBG-Penetrated Power Systems

Chu

Teng

2021

IEEE Trans. Power Syst.

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With the increasing penetration of renewable energy sources, power system operation has to be adapted to ensure the system stability and security while considering the distinguished feature of the Power Electronics (PE) interfaced generators. The static voltage stability which is mainly compromised by heavy loading conditions in conventional power systems, faces new challenges due to the large scale integration of PE-interfaced devices. This paper investigates the static voltage stability problem in high PE-penetrated system. The analytic criterion that ensures the voltage stability at the Inverter-Based Generator (IBG) buses are derived with the interaction of different IBGs being considered. Based on this, an optimal system scheduling model is proposed to minimize the overall system operation cost while maintaining the voltage stability during normal operation through dynamically optimizing the active and reactive power output from IBGs. The highly nonlinear voltage stability constraints are effectively converted into Second-Order-Cone (SOC) form, leading to an overall Mixed-Integer SOC Programming (MISOCP), together with the SOC reformulation of AC power flow and frequency constraints. The effectiveness of the proposed model and the impact of various factors on voltage stability are demonstrated in thorough case studies.

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Security-Constrained Unit Commitment Considering Locational Frequency Stability in Low-Inertia Power Grids

Cited by 20 publications

References 31 publications

Assessment and management of frequency stability in low inertia renewable energy rich power grids

Assessment and management of frequency stability in low inertia renewable energy rich power grids

An Analytical Formulation for Mapping the Spatial Distribution of Nodal Inertia in Power Systems

Short Circuit Current Constrained UC in High IBG-Penetrated Power Systems

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