期刊
IEEE TRANSACTIONS ON POWER DELIVERY
卷 33, 期 6, 页码 3095-3104出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPWRD.2018.2829846
关键词
Wind power systems; subsynchronous control interaction (SSCI); subsynchronous resonance (SSR); synchrophasor; system-wide protection
资金
- National Natural Science Foundation of China [51737007]
- National Key R&D Program of China [2017YFB0902000]
- Research Project of Operation Characteristics and Control of Large Scale Renewable Energy Sources Delivered Through Series-Compensated Transmissions [52010116000S]
Unstable subsynchronous control interaction (SSCI) between wind farms (WFs) and series-compensated grid has posed a big threat to the safety of equipment and the stability of system. Many studies have been conducted on its analysis and control. However, very little research has been done on the protection. To fill the gap, this paper proposes a system-wide protection against unstable SSCI in wind power systems with fixed series compensations. The protection is composed of a centralized protection coordinator (CPC) and several distributed protection relays (DPRs). Local DPRs measure the subsynchronous impedances of WFs in real time. These impedances are next collected by the CPC to calculate the sensitivities of tripping for each WF. The sensitivities are then used to determine the candidate WFs and the number of WTGs to trip at those WFs, so as to stabilize the SSCI. The effectiveness of the proposed protection is verified with detailed electromagnetic simulations on a wind power system that had experienced actual SSCI incidents.
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