Analyzing the Propagation of Disturbances in CPES considering the States of ICT-enabled Grid Services

Narayan, A.; Klaes, Marcel; Lehnhoff, Sebastian; Rehtanz, Christian

doi:10.1109/epec52095.2021.9621496

Cited by 6 publications

(11 citation statements)

References 50 publications

(89 reference statements)

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“…In [8], the operational states of the ICT-enabled grid services were introduced as a means to capture their performance in a generalized manner. The authors in [7], [23] discuss the operational state classification for two services, namely state estimation, and on-load tap changer control.…”

Section: B Related Workmentioning

confidence: 99%

“…This paper investigates critical interdependencies between future power systems and ICT as described in [10] and [7]. It does so by investigating the impact of three ICT error categories, i.e., delayed data (latency), unavailable data (data loss), and data corruption, on an ADN controller's response.…”

Section: Contributionmentioning

confidence: 99%

“…This improves the interpretability of the results and provides an overview of the performance of service for system operators and planners. The operational state of a service, presented in [8] and demonstrated in [7], can be classified as normal, limited or failed. These operational states denote the performance of the service.…”

Section: Operational States Of Adn Control Servicementioning

confidence: 99%

“…Detailed requirements for the corresponding ICT system are wellknown for high-voltage (HV) grids. In contrast to that, the dependency of MV and LV grids on ICT is a critical topic [7]. The low ICT penetration on these grid levels implies that only few data is generated and transmitted.…”

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confidence: 99%

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Impact of ICT Latency, Data Loss and Data Corruption on Active Distribution Network Control

et al. 2023

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The ongoing changes in modern power systems towards increasingly decentralized systems render the coordination of generation assets and the corresponding dependency on Information and Communication Technology highly relevant. This work demonstrates the impact of three types of ICT errors, namely delayed data, data loss and data corruption, on the control of distributed energy resources in an active distribution network. The settling time of the active power response at the interconnection point between the distribution and transmission system is investigated in the simulations. Additionally, two fallback strategies to mitigate the impact of data loss are proposed and evaluated with regard to their impact on the controller's response. Finally, a generalized, aggregated service state description is proposed in order to capture the performance of the active distribution network service. It is meant to improve the interpretability of the results, which can be used to compare service designs and setups.

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Section: B Related Workmentioning

confidence: 99%

Section: Contributionmentioning

confidence: 99%

Section: Operational States Of Adn Control Servicementioning

confidence: 99%

mentioning

confidence: 99%

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Impact of ICT Latency, Data Loss and Data Corruption on Active Distribution Network Control

et al. 2023

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“…The performance or operational state of a grid service depends on three ICT properties, namely availability, timeliness and correctness [7]. These properties not only represent the requirements of grid services on the ICT system but also map the impact of various disturbances on the ICT system and, consequentially, on the grid services it enables.…”

Section: Introductionmentioning

confidence: 99%

Modelling the propagation of properties across services in cyber-physical energy systems

Narayan,

Brand,

Huxoll

et al. 2023

Preprint

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Modern power systems, referred to as cyber-physical energy systems (CPESs), are complex systems with strong interdependencies between power and information and communication technology (ICT) systems. CPESs also have dependencies between the essential grid services. For instance, coordinated voltage control depends on state estimation, which depends on measurement acquisition. Due to the high relevance of these grid services for operating CPESs, assessing their performance is crucial for assessing the performance of a CPES. Most of these grid services are so-called ICT-enabled grid services, which means that they rely to a high degree on ICT. Accordingly, properties such as availability, correctness and timeliness, which depend on the involved software, hardware and data of the ICT system, must be considered for assessing the performance of an ICT-enabled grid service. Disturbances and repair actions in CPESs impact these properties, which can then propagate and affect the performance of a grid service as well as other dependent grid services. There is, therefore, a need for the ability to model the influence of the properties of software, hardware and data on ICT-enabled grid services for single services as well as across several services, resulting in a propagation of these parameters. This paper proposes a meta model for assessing the performance of ICT-enabled grid services, which can be instantiated for different grid services considering their dependencies. A multi-dimensional operational state space, which serves as a visualisation of the performance of grid services in terms of their state trajectory, is also proposed in this paper. These contributions enable new possibilities for planning and vulnerability analyses: property changes in parts of the ICT system can be simulated to investigate their consequences throughout the ICT-enabled grid services. This is demonstrated by a case study with a state estimation service considering an exemplary CPES and scenarios with disturbances. The performance of this state estimation service considering the disturbances is then investigated using the proposed meta model, and the change in performance is visualised as trajectories in the proposed operational state space.

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Applying Trust for Operational States of ICT-Enabled Power Grid Services

Brand,

Narayan,

Lehnhoff

2024

ACM Trans. Auton. Adapt. Syst.

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Digitalization enables the automation required to operate modern cyber-physical energy systems (CPESs), leading to a shift from hierarchical to organic systems. However, digitalization increases the number of factors affecting the state of a CPES (e.g., software bugs and cyber threats). In addition to established factors like functional correctness, others like security become relevant but are yet to be integrated into an operational viewpoint, i.e. a holistic perspective on the system state. Trust in organic computing is an approach to gain a holistic view of the state of systems. It consists of several facets (e.g., functional correctness, security, and reliability), which can be used to assess the state of CPES. Therefore, a trust assessment on all levels can contribute to a coherent state assessment. This paper focuses on the trust in ICT-enabled grid services in a CPES. These are essential for operating the CPES, and their performance relies on various data aspects like availability, timeliness, and correctness. This paper proposes to assess the trust in involved components and data to estimate data correctness, which is crucial for grid services. The assessment is presented considering two exemplary grid services, namely state estimation and coordinated voltage control. Furthermore, the interpretation of different trust facets is also discussed.

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Analyzing the Propagation of Disturbances in CPES considering the States of ICT-enabled Grid Services

Cited by 6 publications

References 50 publications

Impact of ICT Latency, Data Loss and Data Corruption on Active Distribution Network Control

Impact of ICT Latency, Data Loss and Data Corruption on Active Distribution Network Control

Modelling the propagation of properties across services in cyber-physical energy systems

Applying Trust for Operational States of ICT-Enabled Power Grid Services

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