Fuzzy‐based frequency security evaluation of wind‐integrated power systems

Steinkohl, Joachim; Peyghami, Saeed; Wang, Xiongfei; Blaabjerg, Frede

doi:10.1049/esi2.12033

Cited by 2 publications

(1 citation statement)

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“…The former is becoming more challenging in power system operation and planning, especially with the increasing penetration level of IBR, which brings about insufficient inertial and primary frequency responses [3], [4]. The authors in [5] consider the frequency security analysis to provide an appropriate frequency control scheme when power systems are utilized the wind energy or frequency security index. This determines the frequency security based on all aspects of the frequency profile presented to specify the relative distance from the security margin [6].…”

Section: Introductionmentioning

confidence: 99%

Graph Neural Network Framework for Security Assessment Informed by Topological Measures

Dezvarei¹,

Tomsovic²,

Sun³

et al. 2023

Preprint

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In the power system, security assessment (SA) plays a pivotal role in determining the safe operation in a normal situation and some contingencies scenarios. Electrical variables as input variables of the model are mainly considered to indicate the power system operation as secure or insecure, according to the reliability criteria for contingency scenarios. In this approach, the features are in grid format data, where the relation between features and any knowledge of network topology is absent. Moreover, the traditional and common models, such as neural networks (NN), are not applicable if the input variables are in the graph format structure. Therefore, this paper examines the security analysis in the graph neural network (GNN) framework such that the GNN model incorporates the network connection and node's neighbors' influence for the assessment. Here the input features are separated graphs representing different network conditions in electrical and structural statuses. Topological characteristics defined by network centrality measures are added in the feature vector representing the structural properties of the network. The proposed model is simulated in the IEEE 118-Bus system for the voltage static security assessment (SSA). The performance indices validate the efficiency of the GNN-based model compared to the traditional NN model denoting that the information enclosed in graph data boosts the classifier performance since the GNN model benefits the neighbors' features. Moreover, outperforming of GNN-based model is determined when robustness and sensitivity analyzes are carried out. The proposed method is not limited to a specific task and can be extended for other security assessments with different critical variables, such as dynamic analysis and frequency criteria, respectively.

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Section: Introductionmentioning

confidence: 99%