Emergency peak shaving dispatching method for power system considering flexibility of multiple power generation resources

Abstract

With the increasing access proportion of renewable energies and the enlarged difference between peak and valley loads， the peak regulation modes of power systems are suffering more and more severe situation. Especially in the emergency period when the supply and demand balance is tight， the requirement for the regulation flexibility in the generation side is very urgent to conduct peak shaving of the system. At present， the regulation capability in the generation side is mainly provided by a few types of power generation resources， while the flexibilities of other types of generation resources in the system， e.g.， nuclear power and external power， have not been effectively exploited and utilized. This paper aims to coordinate the flexible adjustment ability of multiple power generation resources and relieve the peak shaving pressure of the power system in the emergency period. Firstly， the framework of emergency peak shaving scheduling of the power system considering the flexibilities of multiple power generation resources is constructed. Then， an emergency period evaluation method based on day-ahead unit commitment is proposed. On this basis， an optimal dispatch model of peak shaving for the power system considering the regulation characteristics of multiple power generation resources is established. Finally， simulation results verify the effectiveness of the proposed framework and method.

Keywords

• multiple power generation resources
• flexibility
• peak shaving
• optimal dispatch