Micro power grid wind and solar energy storage model prediction control method

Abstract

The invention discloses a micro power grid wind and solar and energy storage model prediction control method, comprising steps of establishing a prediction model, predicting the maximal output of photovoltaic generation and a wind power set in the micro power grid in the future set time frame by the prediction model, using the predicted the wind power and photovoltaic maximal output as a constraint condition to perform on-line optimization on the output of the wind power set in the micro power grid, the photovoltaic generation and the storage battery to provide reference output, and performing feedback adjustment on the reference outputs of the wind power set, the photovoltaic generation and the energy storage battery according to the real-time adjustable capacity of the wind power set and the photovoltaic generation. Compared with the traditional micro power grid control method, the micro power grid wind and solar energy storage prediction control method reduces the accuracy requirement for the prediction model in the uncertainty process, remedies the defects that the wind power and photovoltaic prediction model is low in prediction accuracy and the high uncertainty in output, and effectively improves the operation characteristics of the micro power grid.

Description

technical field [0001] The invention relates to a model predictive control method of wind-solar-storage-storage in a microgrid. Background technique [0002] Distributed power generation has the advantages of resource and environment friendliness and flexible power supply. The development of distributed power generation on the basis of centralized power generation and large power grid has become an inevitable trend in the development of smart grids at home and abroad. According to the national energy development plan, by 2020 my country's distributed power generation installed capacity will account for 9%, which is an important part of the power supply system. In order to solve the problems brought about by the grid connection of distributed generation, the concept of microgrid was put forward. Based on domestic and foreign research results, microgrid refers to a micro power supply network based on distributed power generation technology, mainly based on renewable energy, u...

AI Technical Summary

Problems solved by technology

[0003] The uncertainty of wind power and photovoltaic output is large, it is difficult to predict, and its prediction accuracy is also very low, and the longer the forecast is in advance, the greater the forecast error

The integration of wind power and photovoltaics increases the uncertainty of micro-grid operation. The existing micro-grid control methods require high accuracy of prediction models for uncertain processes. Therefore, it is urgent to find control methods that can better deal with uncertainties.

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