Eriksson, Robert

Robert Eriksson

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Security analysis of interconnected AC/DC systems

This paper analyses N-1 security in an interconnected ac/dc transmission system using power transfer distribution factors (PTDFs). In the case of a dc converter outage the power needs to be redistributed among the remaining converter to maintain power balance and operation of the dc grid. The redistribution of power has a sudden effect on the power-flow in the interconnected ac system. This may cause overloading of lines and transformers resulting in disconnection of equipment, and as a consequence cascading failure. The PTDF is used as a method to analyze and avoid violating limits by in the dc voltage control design consider the power distribution for a converter outage. By proper design and utilizing the proposed method increases the N-1 security and the secure transfer limits. This article proposes a method which minimizes the 2-norm of the sum of the PTDFs with constraints of not violating any line or transformer limits. Simulations were performed in a model of the Nordic power system where a dc grid is placed on top. The simulation supports the method as a tool to consider transfer limits in the grid to avoid violate the same and increase the security after a converter outage

Online Research Database In Technology

Security analysis of interconnected AC/DC systems - DTU Orbit (08/11/2017) Security analysis of interconnected AC/DC systemsThis paper analyses N-1 security in an interconnected ac/dc transmission system using power transfer distribution factors(PTDFs). In the case of a dc converter outage the power needs to be redistributed among the remaining converter tomaintain power balance and operation of the dc grid. The redistribution of power has a sudden effect on the power-flow inthe interconnected ac system. This may cause overloading of lines and transformers resulting in disconnection ofequipment, and as a consequence cascading failure. The PTDF is used as a method to analyze and avoid violating limitsby in the dc voltage control design consider the power distribution for a converter outage. By proper design and utilizingthe proposed method increases the N-1 security and the secure transfer limits. This article proposes a method whichminimizes the 2-norm of the sum of the PTDFs with constraints of not violating any line or transformer limits. Simulationswere performed in a model of the Nordic power system where a dc grid is placed on top. The simulation supports themethod as a tool to consider transfer limits in the grid to avoid violate the same and increase the security after a converteroutage. General informationState: PublishedOrganisations: Department of Electrical Engineering, Center for Electric Power and Energy, Electric power systems Authors: Eriksson, R. (Intern)Number of pages: 6Pages: 1-6Publication date: 2015 Host publication informationTitle of host publication: Proceedings of 2015 Australasian Universities Power Engineering Conference (AUPEC)Publisher: IEEEISBN (Print): 9781479987252Main Research Area: Technical/natural sciencesConference: 2015 Australasian Universities Power Engineering Conference, Wollongong, Australia, 27/09/2015 -27/09/2015load flow, power convertors, power system control, power system interconnection, power system reliability, power systemsecurity, power system simulation, voltage control, Components, Circuits, Devices and Systems, Engineering Profession,Power, Energy and Industry Applications, Robotics and Control Systems, Signal Processing and Analysis, DC voltagecontrol, HVDC transmission, interconnected AC-DC systems security analysis, Jacobian matrices, Linear programming,Load flow control, N-1 security, Nordic power system, Power distribution, power distribution converter outage, Powersystem faults, Power system stability, power transfer distribution factors, PTDF, Security, Voltage controlDOIs: 10.1109/AUPEC.2015.7324794 Source: FindItSource-ID: 276552314Publication: Research - peer-review › Article in proceedings – Annual report year: 2015 

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Security analysis of interconnected AC/DC systems

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