By Topic

The Frequency Closed-Loop Control Strategy of Islanded Power Systems

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

4 Author(s)
Xiangning Lin ; Huazhong Univ. of Sci. & Technol., Wuhan ; Hanli Weng ; Qing Zou ; Pei Liu

A novel power system frequency control strategy is designed in this paper, which is mainly used to improve the stability of the islanding power system. Detecting the change of circuit breaker status, it is feasible to identify the serious accidents, for instance, a generator outage or disconnection from main grids, and so on. The balanceable power before disturbance and the capacity of the removed power can be used to calculate the power deficiency. Then, appropriate load can be shed adaptively. In the subsequent regulating process, adapting to the various stages of frequency variation, the concepts of rough-adjusting step and fine-adjusting step are proposed to obtain a balance between shedding loads quickly and refining the load shed in every step. The concept of proportional-integral-differential (PID) is introduced to design a closed-loop control strategy to trace frequency variation, with which a balance between restraining the sharp drop of frequency effectively and releasing the reserved system capacity thoroughly can be obtained. Moreover, the frequency recovery curve can be optimized and the dead zone of control during the frequency rising stage can be avoided. Compared with the conventional under-frequency loading shedding (UFLS) schemes, the effectiveness of the control strategy presented has been verified by EMTDC simulation tests.

Published in:

Power Systems, IEEE Transactions on  (Volume:23 ,  Issue: 2 )