期刊
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
卷 108, 期 -, 页码 31-39出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijepes.2018.12.036
关键词
Early warning; Renewable power generation; Wide-area monitoring; Subsynchronous oscillation; Synchrophasor
资金
- National Key R&D Program of China [2017YFB0902000]
- National Natural Science Foundation of China [51737007]
- Yunnan Power Grid Co., Ltd. [0560002018030103XT00121]
With the increasing penetration of renewable power generation (RPG) in modern power systems, sub synchronous oscillation (SSO) induced by the interaction between RPG and the grid is posing a great threat to the system stability and equipment safety. To address this issue, this paper proposes a wide-area monitoring and early-warning system of SSO. It incorporates the locally deployed subsynchronous phasor measurement units (S-PMUs) and a centralized data center & subsynchronous dynamics analyzer (DC&SDA). Several key functions have been developed, including: (1) the subsynchronous state estimation (SSE) to form global view or observability of SSO dynamics, (2) the establishment of subsynchronous power & current flow to locate oscillation source/path, and (3) the real-time evaluation of subsynchronous stability using two complementary criteria, one based on the identification of oscillation damping and the other based on the frequency characteristics of the impedance models. The practicality and performance of the proposed system have been demonstrated with electromagnetic transient (EMT) simulations on a practical system that suffered SSO incidents.
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