Journal
IEEE TRANSACTIONS ON POWER SYSTEMS
Volume 33, Issue 5, Pages 5135-5146Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPWRS.2018.2792906
Keywords
Offshore wind; unit commitment; DC grids; frequency stability; VSC; multi-terminal; inertia; primary reserve
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Funding
- National Natural Science Foundation of China [51707017]
- Chongqing Research Program of Basic Research and Frontier Technology [cstc2017jcyjAX0422]
- Entrepreneurship and Innovation Program for Chongqing Overseas Returnees [cx2017113]
- Natural Sciences and Engineering Research Council of Canada
- Saskatchewan Power Corporation
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This paper investigates how the operation of the onshore AC grid and the offshore voltage source converter-based multiterminal dc (VSC-MTDC) grid can be cooptimized within the unit commitment (UC) framework to enhance system frequency stability following various contingencies. Frequency dynamic constraints corresponding to three typical types of outages (i.e., loss of a synchronous unit, loss of a grid-side VSC, and loss of a wind farm-side VSC) are established. Anovel frequency dynamics constrained UC for integrated AC/VSC-MTDC systems is then proposed. Case studies on three integrated AC/VSC-MTDC systems demonstrate that major frequency disturbances caused by credible contingencies occurring in either the AC grid or VSC-MTDC grid can be effectively stabilized by the proposed approach.
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