1. Wide-area monitoring and early-warning of subsynchronous oscillation in power systems with high-penetration of renewables.
- Author
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Xie, Xiaorong, Zhan, Ying, Liu, Huakun, Li, Wenyun, and Wu, Chen
- Subjects
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SUBSYNCHRONOUS resonance , *ELECTRIC power systems , *ELECTROMAGNETIC fields , *ELECTRIC impedance , *OSCILLATIONS - Abstract
Highlights • A wide-area monitoring and early-warning system of SSO is proposed. • The system incorporates locally deployed S-PMUs and a centralized DC&SDA. • A global view of SSO is established with the subsynchronous state estimation. • The subsynchronous power & current flow is formed to locate oscillation source/path. • Two stability criteria are used for the real-time evaluation of SSO stability. Abstract With the increasing penetration of renewable power generation (RPG) in modern power systems, subsynchronous 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. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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