DocumentCode :
49249
Title :
Power Flow Algorithms for Multi-Terminal VSC-HVDC With Droop Control
Author :
Wenyuan Wang ; Barnes, M.
Author_Institution :
Sch. of Electr. & Electron. Eng., Univ. of Manchester, Manchester, UK
Volume :
29
Issue :
4
fYear :
2014
fDate :
Jul-14
Firstpage :
1721
Lastpage :
1730
Abstract :
This paper addresses the problem posed by complex, nonlinear controllers for power system load flows employing multi-terminal voltage source converter (VSC) HVDC systems. More realistic dc grid control strategies can thus be carefully considered in power flow analysis of ac/dc grids. Power flow methods for multi-terminal VSC-HVDC (MTDC) systems are analyzed for different types of dc voltage control techniques and the weaknesses of present methods are addressed. As distributed voltage control is likely to be adopted by practical dc grids, a new generalized algorithm is proposed to solve the power flow problems with various nonlinear voltage droops, and the method to incorporate this algorithm with ac power flow models is also developed. With five sets of voltage characteristics implemented, the proposed scheme is applied to a five-terminal test system and shows satisfactory performance. For a range of wind power variations and converter outages, post-contingency behaviors of the system under the five control scenarios are examined. The impact of these controls on the power flow solutions is assessed.
Keywords :
HVDC power convertors; HVDC power transmission; distributed parameter systems; fault diagnosis; load flow control; nonlinear control systems; voltage control; converter outages; dc grids; dc voltage control techniques; distributed control; droop control; generalized algorithm; live-terminal test system; multiterminal VSC-HVDC; nonlinear controllers; post-contingency behaviors; power system load flows; voltage characteristics; voltage source converter; wind power variations; Equations; Jacobian matrices; Load flow; Power conversion; Supervisory control; Voltage control; Dc grid; MTDC; droop control; multi-terminal; power flow; voltage source converter (VSC) HVDC;
fLanguage :
English
Journal_Title :
Power Systems, IEEE Transactions on
Publisher :
ieee
ISSN :
0885-8950
Type :
jour
DOI :
10.1109/TPWRS.2013.2294198
Filename :
6702505
Link To Document :
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