Source-load-storage power characteristic indexes and cointegration operation of renewable energy penetrated power system

In recent years, the penetration of renewable energy in power system has been significantly increased. Due to its inherent intermittency and randomness, the optimal dispatch requires exceeding regulation among the power source, grid, load and storage. Therefore, more and more attention has been attached to the coordination operation of source-grid-load-storage. During coordination operation, the relationship of generation and load should be represented by a relevant function. This thesis aims to establish the source-load-storage power characteristic indexes. Furthermore, the theoretical and application research on coordination and cointegration operation for renewable energy penetrated power system is of great realistic and theoretical significance. The main contribution of this thesis includes: (1) In terms of power curve and power characteristics indexes, several novel power characteristic indexes for traditional units, renewable energy, storage system and demand load are proposed, which are collectively called source-load-storage power characteristic indexes. (2) In terms of quantitative description of coordinated regulation, the potential cointegration relationship between the source-load-storage power curve is investigated. A cointegration idea to realize quantitative description in coordination operation is proposed. The multi-objective optimization model of cointegration operation is established. (3) In terms of economy-driven cointegration operation, the cointegration theory are applied in the relationship of electricity market price curve and power curve. The influence of cointegration relationship between renewable energy power and real-time electricity price on renewable energy consumption is also analysed. (4) In terms of technical measures of cointegration operation, the methods of appliance and storage equipment in regulation are investigated. Load with active response in demand side is also a significant technical measurement in power system cointegration operation. Combining multiple power characteristics indexes, cointegration operation model, economic and technique measures, the waste of renewable energy and frequent regulation of traditional units can be minimized, the demand response and storage system can be fully exploited in regulation and control. The cointegration operation based on cointegration theory are considered as a promising solution to optimal operation of renewable energy highly penetrated power system