Research On Microgrid Scheduling Optimization Based On MPC

In recent years,environmental and energy problems have seriously restricted the economic development of various countries.With its advantages,microgrid has gained widespread attention and recognition,and microgrid technology has also been vigorously developed.Due to the high permeability of the distributed power supply in the microgrid and the flexibility of its operation mode,the optimization operation of the microgrid faces many difficulties.Therefore,how to realize the economic optimization scheduling of the microgrid has become the research focus in microgrid research.Firstly,the output characteristics and mathematical models of each distributed generation in microgrid are analyzed.Then,through the analysis of the influence of distributed power sources on the distribution network,a multi-power coordinated control architecture based on hierarchical control and energy management is developed.According to the characteristics of distributed renewable energy power prediction error,the multi-time scale coordinated optimization scheduling strategy of microgrid is adopted.Secondly,according to the operating characteristics of the microgrid grid-connected and isolated network operation modes,the economic,environmental and reliability of the microgrid operation are fully considered.The day-ahead and intra-day optimal scheduling models of the microgrid in the two operating modes are established respectively,and the optimal scheduling strategy for grid-connected and isolated network operation was formulated according to the time-sharing electricity price policy.In the day-ahead dispatching stage,the genetic algorithm obtains the results of the unit optimization of the micro-power supply in the grid-connected and isolated mode,and in the intra-day rolling optimization stage,the model predictive control algorithm(MPC)is used to modify the output of each distributed power generation on the basis of the optimal results of the day-ahead dispatch.Finally,taking a microgrid with distributed power sources such as wind power,photovoltaic,fuel cell and energy storage devices as an example,the feasibility and practicability of the economic optimization scheduling model and optimization algorithm for the day-ahead and intra-day are verified,and the distributed power sources are realized,and the economic operation and power supply reliability of the micro-grid are improved.