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Voltage Support Provided by STATCOM in Unbalanced Power Systems
Energies 2014, 7(2), 1027-1047; doi:10.3390/en7021027
Article

Anticipating and Coordinating Voltage Control for Interconnected Power Systems

1,* , 2
 and
1
Received: 19 November 2013 / Revised: 27 January 2014 / Accepted: 20 February 2014 / Published: 24 February 2014
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Abstract

This paper deals with the application of an anticipating and coordinating feedback control scheme in order to mitigate the long-term voltage instability of multi-area power systems. Each local area is uniquely controlled by a control agent (CA) selecting control values based on model predictive control (MPC) and is possibly operated by an independent transmission system operator (TSO). Each MPC-based CA only knows a detailed local hybrid system model of its own area, employing reduced-order quasi steady-state (QSS) hybrid models of its neighboring areas and even simpler PV models for remote areas, to anticipate (and then optimize) the future behavior of its own area. Moreover, the neighboring CAs agree on communicating their planned future control input sequence in order to coordinate their own control actions. The feasibility of the proposed method for real-time applications is explained, and some practical implementation issues are also discussed. The performance of the method, using time-domain simulation of the Nordic32 test system, is compared with the uncoordinated decentralized MPC (no information exchange among CAs), demonstrating the improved behavior achieved by combining anticipation and coordination. The robustness of the control scheme against modeling uncertainties is also illustrated.
Keywords: coordination; model predictive control; distributed voltage control; robustness; load tap changing transformers; hybrid automaton coordination; model predictive control; distributed voltage control; robustness; load tap changing transformers; hybrid automaton
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Moradzadeh, M.; Boel, R.; Vandevelde, L. Anticipating and Coordinating Voltage Control for Interconnected Power Systems. Energies 2014, 7, 1027-1047.

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