Multi-time-scale micro grid energy management optimization scheduling method

Abstract

The invention relates to a management optimization method in the field of alternating-current micro grids, and specifically to a multi-time-scale micro grid energy management optimization scheduling method. Aiming at the problems that the existing studies are incomprehensive on consideration of the running status of a micro grid, not detailed enough on the control strategy in each running status of the micro grid, insufficient on calculation accuracy of the running cost and the like, the method comprises a day-ahead economic optimization scheduling phase and an intraday economic optimization scheduling phase; the former considers the electricity price at peak, valley and flat time, and distributed unit power optimization allocation in the micro grid is performed according to day-ahead photovoltaic and load prediction by using the total running cost including the running and maintenance cost of a lithium battery and a fuel battery, interrupted compensation of an interruptible load, price of electricity sold by a large grid and the like as a target function; and the latter considers the outputs of electricity purchased from the large grid by the micro grid, a super-capacitor and the fuel battery, and an independent control strategy is respectively established for the peak, valley and flat time, so that the control strategies are more specific and detailed.

Description

technical field [0001] The invention relates to an optimization method for energy management of an AC microgrid, in particular to an optimal scheduling method for energy management of a multi-time scale microgrid. Background technique [0002] The microgrid can not only efficiently solve the large-scale decentralized access problem of distributed power, but also serve as a useful supplement to the traditional power grid, making distributed power generation an effective carrier for the traditional power grid to accept and utilize energy. Each distributed power source in the microgrid has its own advantages and disadvantages, and its mutual coordination and cooperation have led to extensive research on energy management and optimization of the microgrid, that is, under the premise of power balance, distributed power generation (DER), energy storage Optimum scheduling of power between loads and loads makes microgrids operate optimally. [0003] For the optimal operation of the...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of coordination and cooperation of various distributed units in the microgrid, the present invention takes into account the operation economy and reliability of the microgrid, and aims at the incomplete consideration of the operating state of the microgrid existing in the existing research, and the control of each operating state of the microgrid Insufficient detailed strategy and insufficient accuracy of operation cost calculation, etc., a multi-time scale microgrid energy management optimal scheduling method is established

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