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Stability Analysis of a multi Area System with Renewable Energy and multi-terminal DC Tie Lines

Journal of Power and Energy Engineering 2018年第9期6卷 85-96页

作者： Moses Peter Musau Department of Electrical and Information Engineering The University of Nairobi Nairobi Kenya

Security constrained multi area multi objective dynamic economic dispatch (SCMAMODED) with renewable energy (RE) and all the possible MTDC stability constraints is formulated for the first time. The stability merits of multi terminal DC (MTDC) tie lines as compared to the traditional HVAC forms the main objective of this paper. Probabilistic load flow (PLF) is applied to determine the system parameters while the uncertainties are modelled using Scenario Based Method (SBM). The simulation results reveal that with the use of MTDC tie lines, the frequency and voltage stability in the MAMODED with renewable energy sources (RES) are enhanced while keeping the MTDC power exchange interface nodes at secure levels.

关键词： multi-terminal DC (MTDC) Tie Lines Probalistic Load Flow (PLF) Renewable Energy Sources (RES) Security Constrained multi-Area multi-Objective Economic Dispatch (SCMAMODED) Stability

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Key Technologies of Ultra-high Voltage Hybrid LCC-VSC MTDC Systems

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CSEE Journal of Power and Energy Systems 2019年第3期5卷 365-373页

作者： Hong Rao Yuebin Zhou Shukai Xu Xipeng Cai Wanyu Cao Yiliang Xu Chenglin Ren the Electric Power Research Institute of China Southern Power Grid Co. Ltd.Guangzhou 510663China EHV Transmission Company of China Southern Power Grid Co. Ltd.Guangzhou 510663China

The key technologies of ultra-high voltage hybrid LCC-VSC MTDC systems are investigated,focusing on the design of system configurations,converter topologies and the control and protection system.A double converter per pole of VSC connection is proposed along with the design of a 5000 MW VSC valve to develop a±800 kV/5000 MW large-capacity power *** hybrid MMC topology capable of clearing the DC faults and the control strategy are developed to effectively improve the reliability in case of overhead line *** control and protection system of the LCC-VSC MTDC system is introduced to offer flexible operations under both normal and abnormal conditions,which includes voltage/current margin-based coordination,converter switch-in and switch-out,re-connection and drop-off of a third *** of an LCC-VSC MTDC system based on the LCC-VSC MTDC project are performed.

关键词： HVDC LCC multi-terminal overhead line ultra-high voltage VSC

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