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mproved Zone 1 Top-line Tilting Scheme for Polygonal Distance Protection in the Outgoing Line of Type-4 wind parks

CSEE Journal of Power and Energy Systems 2023年第1期9卷 172-184页

作者： Kaiqi Ma Hans Kristian Høidalen Zhe Chen Claus Leth Bak Department of Energy Aalborg University9220 AalborgDenmark Department of Electric Power Engineering Norwegian University of Science and TechnologyNO-7491TrondheimNorway

The impedance element in distance protection equipment in the outgoing line of a wind park(WP)may be heavily affected by the fault response of the *** resistive grid faults,relay over-reach(or under-reach)may manifest,depending on the fault current regulating requirements in the specific grid code deployed in WP and the fault *** at potential solution,*** existing zone 1(fast tripping zone,non-delayed)top-line tilting(Z-1-TLT)function in modern numerical relays,this paper first assesses its adaptability under the WP integrated *** the principle of Z-1-TLT itself and fault modeling to the WP,an improved Z-1-TLT scheme is developed,which can actively compensate for the possible relay overreach or under-reach during resistive faults,utilizing relay side fault quantities *** at the needless action of the new Z-1-TLT scheme against certain faults,malfunction risk area detection and dead zone detection are introduced as auxiliary criteria to optimize protective *** results prove the improved Z-1-TLT scheme can effectively improve reliability of distance protection deployed in the WP outgoing line.

关键词： Distance protection fault current regulating requirement grid code relay over-reach(under-reach) wind park zone 1 top-line tilting

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Stability Study of a Mixed Islanded Power Network

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Journal of Energy and Power Engineering 2014年第8期8卷 1449-1459页

作者： Antonio Carlos Padoan Jr. Christophe Nicolet Basile Kawkabani Jean-Jacques Simond Alexander Schwery Francois Avellan ALSTOM (Brazil) Ltd. Sao Paulo-S BR-05035-000 Brasil Power Vision Engineering Chemin des Champs-Courbes Ecublens CH-1024 Switzerland Electrical Machinery Group EPFL (Ecole Polytechnique Federale de Lausanne) Lausanne CH-1015 Switzerland Hydro Generator Technology Center ALSTOM (Switzerland) Ltd. Birr CH-5242 Switzerland Laboratory for Hydraulic Machines EPFL (Ecole Polytechnique Federale de Lausanne) Lausanne CH-1015 Switzerland

This paper presents the modelling, simulation and analysis of the dynamic behaviour of a mixed power network of 2.78 GW including hydro, thermal and wind power plants. The modelling of each power plant is described. The set of parameters of the turbine speed governor of the hydroelectric power plant is determined with a specific identification procedure to achieve stable operation for different cases such as interconnected, isolated or islanded operation. The analysis of the stability of the entire mixed islanded power plant is investigated through time domain simulations for different sets of controllers parameters and for different disturbances （load rejection and turbulent wind speed profile）.

关键词： wind park hydroelectric power station power network stability identification

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