Peak Regulating Capacity Optimization of Shanghai Grid With High Power UHV DC Feed-in
In view of low peak regulation problem that may arise with the feed-in of high power UHV DC into Shanghai Grid,a linear programming model for peak regulating optimization under low-load operation scenario was developed considering Shanghai grid structural and power sources features and the target of peak shaving surplus,as well as the constraints of 500kV transformer operation ratings and generator output limits.By this model the minimum peak regulation deficiency of Shanghai grid summer low-load scenario in 2014 was calculated.The concept of "peak regulation congestion" is proposed and a mixed integer programming model is created to deal with peak regulation capacity reduction due to units shutdown.The optimal unit shutdown schedule is provided for the system to obtain the maximum peak regulating capability.Two other external alternatives which make the UHV DC participate peak regulation and optimize the ratio of DC power shared by Shanghai Grid are discussed.The two alternatives along with the unit shutdown scheme are compared to provide guidance for grid peak regulation.
NETL
NSTL
万方数据
维普
