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Provision of Inertial and Primary Frequency Control Services Using Offshore Multiterminal HVDC Networks

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5 Author(s)
Silva, B. ; INESC Porto-Inst. de Eng. de Sist. e Comput. do Porto, Univ. do Porto, Porto, Portugal ; Moreira, C.L. ; Seca, L. ; Phulpin, Y.
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This paper addresses the problem of providing frequency control services, including inertia emulation and primary frequency control, from offshore wind farms connected through a multiterminal HVDC network. The proposed strategy consists of a cascading control mechanism based on dc voltage regulation at the onshore converters and frequency regulation at the offshore converters. The control scheme involves only local measurements and actions avoiding security and reliability issues of control structures based on remote information. The effectiveness of the proposed strategy is illustrated in a test system that consists of two nonsynchronous areas linked by a multiterminal HVDC grid where two offshore wind farms are also connected.

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Sustainable Energy, IEEE Transactions on  (Volume:3 ,  Issue: 4 )