Transfer capacity enhancement by adaptive coordinated controlof HVDC-links based on forecasted load paths
2011 (English)In: European transactions on electrical power, ISSN 1430-144X, E-ISSN 1546-3109, Vol. 21, no 3, 1455-1466 p.Article in journal (Refereed) Published
Due to the intensive use of the transmission networks one of the major issues in electric energy trading is bottlenecks limiting the transfer capacity between different system areas. In this article, a new method for increasing transfer capacity is suggested. The increase in transfer capacity is obtained by an adaptive coordinated modulation control of multiple HVDC-links in the system. The control method is based on maximizing the distance to the bifurcation surface by adjusting the feedback gain of the HVDC-links modulation controllers. The system is linearized along the forecasted load path. The feedback gains are then chosen in such a way that system remains stable, in a small signal sense, as long as possible along the forecasted load path. The arising optimization problem is then solved using a particle swarm optimization method. If the load is predicted to increase, instability will eventually occur when the loading reaches a critical limit. Using the proposed control method the point in load-space where instability occur will be at a significantly higher loading level. The main contribution of this paper is the proposed new method for adaptively coordinating the power modulation of multiple HVDC-links in a power system, to enhance the total transfer capacity. This in turn will lead to a possibility to increase the traded volumes on the electricity market.
Place, publisher, year, edition, pages
2011. Vol. 21, no 3, 1455-1466 p.
transfer capacity, bifurcation surface, coordinated control, HVDC, stochastic nodal loading, Monte Carlo simulation
Other Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-30619DOI: 10.1002/etep.511ISI: 000290234100008ScopusID: 2-s2.0-79955444469OAI: oai:DiVA.org:kth-30619DiVA: diva2:401153
QC 20110302 QC 201106092011-03-012011-03-012014-01-22Bibliographically approved