Strategy for optimizing short-term and ultra-short-term coordination rolling schedules adapting to access of new energy resources

Abstract

The invention discloses a strategy for optimizing short-term and ultra-short-term coordination rolling schedules on the basis of multiple time scales and an MPC hierarchical control theory after access of new energy resources is carried out. According to the strategy, a coordination rolling schedule general framework adapting to access of the new energy resources and based on the multiple time scales is determined; an MPC (model predictive control) method and a hierarchical control method used by the strategy are determined, the control methods include the concept of the MPC, an application model of the MPC under access of the new energy resources, and the study of the hierarchical control method are determined; based on the multiple time scales, the MPC method and the hierarchical control method, a short-term and ultra-short-term coordination rolling schedule MPC hierarchical control strategy adapting to access of the new energy resources is determined; a coordination rolling schedule MPC hierarchical optimizing model adapting to access of the new energy resources is studied and determined, wherein a rolling schedule optimal planning layer and a mathematical model correcting the planning layer in real time are mainly involved, and the model comprises objective functions, various constraint conditions and the like. Please see the specific steps in the attached abstract map. The strategy achieves the effect of the coordination rolling schedules after intermittent access of the new energy resources is carried out.

Description

technical field [0001] The invention belongs to the technical field of optimized rolling scheduling after intermittent new energy access, and in particular relates to a coordinated rolling scheduling optimization strategy based on multi-time scales and MPC layered control theory adapted to new energy access. Background technique [0002] With the continuous expansion of domestic wind, photovoltaic and other intermittent new energy grid-connected scales, it poses a serious threat to the operation security of the power grid, and the energy management and operation control of the power system are facing severe challenges. The reasons are as follows: [0003] 1) Wind and photovoltaic output has strong uncertainty. The output of intermittent energy sources such as wind and photovoltaics has great uncertainty and is difficult to predict, and its prediction accuracy is also very low, and the longer the prediction time in advance, the greater the prediction error. The access of la...

AI Technical Summary

Problems solved by technology

[0004] 2) Complex optimal scheduling and fast real-time control conflict

These two time scales have a large span, and the dispatching mode is relatively extensive, which cannot adapt to the grid dispatching after large-scale new energy access.

The traditional scheduling method mainly has the following problems: ① There is often a large deviation between the day-ahead load forecast and the actual load, especially the randomness and volatility of large-scale online wind power and photovoltaics, which makes the day-ahead plan in execution and the actual situation. There is a big deviation ;②The time span between day-ahead dispatching and AGC is too large, and the day-ahead planning deviation, load and random disturbance of wind and solar power are all borne by the AGC unit, and the adjustable capacity of AGC is often insufficient, which further affects the safety and power of the system quality

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