Cost-based micro-grid optimization control method

Abstract

The invention discloses a cost-based micro-grid optimization control method. The cost-based micro-grid optimization control method comprises the steps of performing prediction on inner load end load of the micro-grid and positive and negative load curves of energy storage equipment and a distributed power supply; then establishing an electricity price curve of an external power grid, establishing a charging-discharging cost function of the energy storage equipment and a power generation cost function of the distributed power supply, and establishing a demand response cost function; by taking the minimum of the regulation and control cost and stability of the external power grid electricity purchasing curve as constraint conditions, generating an optimization strategy scheme; and finally performing real-time optimization on output curves of the energy storage equipment and the distributed power supply in the micro-grid, regulating on the load end load, and balancing on the load curve of the micro-grid. By calculation of various kinds of regulation and control power generation costs, reasonable power allocation based on the regulation and control costs is realized, and economical system operation of the micro-grid is realized.

Description

technical field [0001] The invention relates to the field of microgrids, in particular to a cost-based optimization control method for microgrids. Background technique [0002] Micro-Grid refers to a small power generation and distribution system composed of distributed power sources, energy storage devices, energy conversion devices, loads, monitoring and protection devices, etc. Microgrid is an autonomous system capable of self-control, protection and management, which can be connected to the external grid or run in isolation. The proposal of microgrid aims to realize the flexible and efficient application of distributed power, and solve the problem of grid connection of distributed power with a large number and various forms. [0003] In the microgrid, the penetration rate of wind power, photovoltaic and other clean energy power generation is getting higher and higher. Due to the fluctuation, intermittent and uncertainty of the output of renewable energy, how to control ...

AI Technical Summary

Problems solved by technology

Simply using energy storage equipment can effectively control the operation of the microgrid, but the construction cost is relatively high, and the life is very limited under frequent use, which will increase the cost of microgrid construction and use

In addition, there are some adjustment methods aimed at ensuring system power balance and frequency stability, which cannot achieve reasonable power distribution, and the economy of system operation is poor.

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