Title :
Observer-based decentralized control of inter-area oscillation in Multi-infeed HVDC system
Author :
Fan, Yang ; Chen, Chen ; Xitian, Wang
Author_Institution :
Dept. of Electr. Eng., Shanghai JiaoTong Univ., Shanghai
Abstract :
An important concern in the operation of multi- infeed HVDC systems is the inter-area low frequency oscillation due to the long-distance bulk-power transmission. In this paper, a decentralized coordinated control design is presented for improvement of inter-area oscillations in the multi-infeed HVDC system. The DC modulation controller are designed based on LQR optimal method and decentralized observers. Without degradation of controller performance, only the local measurement output is required for each damping controller, which greatly reduces the communication burden. A 7-generator, 2-HVDC system was used as the test system. The eigenvalue analysis and nonlinear time domain simulation have demonstrated the validity of the proposed decentralized controllers.
Keywords :
HVDC power transmission; decentralised control; matrix algebra; observers; oscillations; power transmission control; time-domain analysis; DC modulation are controller; damping controller; inter-area oscillation; long-distance bulk-power transmission; low frequency oscillation; multiinfeed HVDC system; nonlinear time domain simulation; observer-based decentralized control; Communication system control; Control design; Damping; Degradation; Distributed control; Eigenvalues and eigenfunctions; Frequency; HVDC transmission; Optimal control; System testing; Multi-infeed HVDC; decentralized control; linear-quadratic regulator; low frequency oscillation; modulation controller; state observer;
Conference_Titel :
Transmission and Distribution Conference and Exposition, 2008. T&D. IEEE/PES
Conference_Location :
Chicago, IL
Print_ISBN :
978-1-4244-1903-6
Electronic_ISBN :
978-1-4244-1904-3
DOI :
10.1109/TDC.2008.4517120
