A Coordinated Control Method of Wind Storage for Smoothing Long-term and Short-term Wind Power Fluctuations

Abstract

The invention relates to a wind storage coordination control method for stabilizing long and short-period wind power fluctuation. The wind storage coordination control method comprises the following steps that: (1) a storage energy control period Td and an MPC control period Ts are set; (2) an MPC control model is built according to a wind storage combined power generation system, wherein the MPC control model includes a target function and corresponding constraints thereof; (3) a wind electricity power predictive value in a set time scale is obtained; (4) optimization solution is performed on the MPC control model, and a current grid-connected power optimization value is obtained; (5) an LPF is utilized to perform continuous control according to the storage energy control period, and the grid-connected power optimization value is adopted to supplement the output of LPF control, and final grid-connected power can be obtained according to a wind electricity power predictive value in the MPC control period; and (6) when the step (5) is executed, whether one MPC control period is completed is judged, if one MPC control period is completed, the step (3) is executed, if the MPC control period is completed, the method returns to the step (6). Compared with the prior art, the wind storage coordination control method for stabilizing long and short-period wind power fluctuation of the invention is advantageous in excellent stabilized effect.

Description

technical field [0001] The invention relates to a wind-storage coordinated control method, in particular to a wind-storage coordinated control method for smoothing long-term and short-term wind power fluctuations. Background technique [0002] In order to cope with the rapid consumption of traditional energy sources and increasingly severe environmental problems, green renewable energy represented by wind energy has been developing rapidly around the world. However, the volatility and intermittency of wind energy have brought many adverse effects on the power grid. In the context of large-scale access to wind power, the research on improving the stability of wind power output power is receiving more and more attention. With the continuous maturity of energy storage technology, the coordinated operation of wind storage has a good effect on stabilizing wind power fluctuations. However, considering the high unit cost of the energy storage system, meeting the smooth output whi...

AI Technical Summary

Problems solved by technology

In this way, on a large time scale of 15 minutes and above, although the MPC principle can make full use of the predictive model to take advantage of its rolling optimization control, it is difficult to take into account short-term wind power fluctuations

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