Software assisted development of protection coordination concepts in nationwide power systems

Keil, T.; Jaeger, Johann; Sollner, N.; Bopp, Thomas; Krebs, R.

doi:10.1049/cp:20080105

Cited by 9 publications

(4 citation statements)

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“… Automated coordination study: Approaches for protection coordination study utilizing significant automation-assistance are presented in [42][43][44]. These methodologies utilize an application integration approach, where a front-end application containing protection analysis algorithms integrates with a short-circuit application and database management system to obtain fault data and protection data respectively.…”

Section: Existing Methods For Studying Wide-area Protection Coordinationmentioning

confidence: 99%

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A Holistic Approach to and Automation of Wide Area Protection Coordination

Alaeddini¹

2022

Preprint

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The electric power transmission network of today is undergoing significant changes in terms of the operational requirements, connected distributed energy resources technologies, and regulatory requirements. In conjunction with an aging infrastructure, these changes have presented new challenges to utilities in their fundamental mission of providing reliable electrical power to the customers. Thus, protection systems must overcome additional challenges towards safe and reliable operation of the power system. Increased investigation of protection system performance is therefore needed to ensure proper coordination of protective relays. However, the complex and integrated nature of the modern protection and control systems call for more sophisticated modeling and study tools for the simulation and analysis of both the dynamics of the interconnected transmission systems and interactions among numerous sets of intelligent electronic devices. Although the protection technology designed for transmission systems is mature, coordination of devices is still a major challenge. This thesis presents a holistic approach to conducting wide-area protection coordination studies through the use of a practical automation-assisted methodology. The wide area protection coordination solution covers process and data management considerations. It also provides a framework workflow for the execution and review of coordination studies, as well as processing and documentation of results to support reliability improvements. The fundamental concept behind the proposed approach is the utilization of software-based automation in a number of key tasks. Firstly, the execution of large-scale protection system coordination studies can be largely automated through utilization of specialized scripts running within short circuit simulation software packages. Secondly, the vast amounts of data inherent in the protection system coordination study results are processed in a manner that assists protection engineers in the identification and resolution of coordination issues. Finally, user friendly automated study summaries are generated that can be used as a record of protection setting recommendations. The effectiveness of the proposed solution is demonstrated through simulations conducted in the CAPE software environment for short circuit studies. Keywords: Protection and Control, Protection Coordination, Power System Reliability, Wide Area Protection Coordination, WAPC.

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Section: Existing Methods For Studying Wide-area Protection Coordinationmentioning

confidence: 99%

“…42 and Table4-43 illustrate the time of operation and the sensitivity of the overcurrent element pickup to its measured fault current. A bolted and 10 ohms resistance SLG fault for system normal condition as well as a bolted SLG fault for transformer Bank A outage were investigated at 5%…”

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confidence: 99%

A Holistic Approach to and Automation of Wide Area Protection Coordination

Alaeddini¹

2022

Preprint

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“…The presented method is analyzing networks as a whole [6][7][8]. By simulation of routinely sequences of fault and contingency scenarios bottlenecks due to dependability and security of the protection system can be revealed.…”

Section: Investigation Of Sc-fault Simulationmentioning

confidence: 99%

Automated Protection Performance Assessment and Enhancement

Jaeger¹,

Liang²,

Krebs³

et al. 2014

JPEE

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New strategies and methods for assessing the security of protection systems to reduce the risk of unnecessary disturbances and blackouts are the main topic of the present paper. The system behavior of a protection system and network is analyzed and assessed as a whole. Hence, the established algorithms are capable to handle complex network structures with regard to an intelligent data management as well as data validation. Protection security assessment comprised two different aspects: on the one hand the behavior regarding dependability and security in terms of speed and sensitivity, on the other hand the behavior regarding the response on dynamic network phenomena as voltage stability and transient stability. A new automated method for assessing the dependability and security of protection systems is shown. The short-circuit simulation tool is used to provide a simulation system including network and protection devices as a whole. The handling of the large amount of resulting data is done by an intelligent visualization method like a "fingerprint" analysis. Further on the paper is focused on the protection response on dynamic network phenomena and presents innovative strategies for this investigation aspect. The structure of simulation environment will be described. Results of a case study show the application of this method on a real network. The system tool which is concluding these two aspects of protection assessment is called SIGUARD ® PSA.

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“…Further on line outages, line overloading, system separations or other customized contingencies can be simulated revealing hidden failures [1,2].…”

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confidence: 99%

Protection security assessment - An important task for system blackout prevention

Jaeger

Krebs

2010

2010 International Conference on Power System Technology

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Protection security assessment of power grids becomes an important task in the course of a competitive energy business and a decarbonized power generation. The analysis of past blackouts studied by the North American Electric reliability Council (NERC) shows that protection relays are involved in about 75% of all major disturbances. One reason for that is the non adequate adaption of the protection systems to the changing network conditions. In particular the relay hidden failures causes relay malfunctions and blackouts in the past. This paper is presenting a new automated method for blackout prevention. It analyzes and assesses the security of protection systems of networks as a whole. Routinely checks of contingency sequences are carried out and reveal bottlenecks of the protection behavior itself and of the coordination of network and protection. The numerical simulation tool PSS @ SINCAL is used providing the possibility of a holistic simulation of network and protection behavior on a fully automated manner. The handling of the big amount of resulting data is done by an intelligent visualization method like a "finger print" analysis.

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Software assisted development of protection coordination concepts in nationwide power systems

Cited by 9 publications

References 0 publications

A Holistic Approach to and Automation of Wide Area Protection Coordination

A Holistic Approach to and Automation of Wide Area Protection Coordination

Automated Protection Performance Assessment and Enhancement

Protection security assessment - An important task for system blackout prevention

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