Steady-state operation strategy for wind and light contained diesel storage isolated microgrid

Abstract

The invention discloses a steady-state operation strategy for a wind and light contained diesel storage isolated microgrid. The strategy is subdivided into five kinds of operation modes. Firstly, an energy storage SOC (system on chip) is divided into four operation intervals, and the energy storage SOC is taken as a starting condition for dividing the operation strategy so as to decide the charging and discharging state selection boundary for the energy storage equipment; then the starting and stopping states and the unoperated areas of a diesel engine are determined by the energy storage SOC and the charging and discharging states thereof; a main power supply of the microgrid is determined by the energy storage SOC, the charging and discharging states and the state of the diesel engine; and finally the operation mode and the mode switching time sequence are determined by the microgrid. The isolated microgrid disclosed by the invention comprises an isolated-type microgrid which is not electrically connected with a main grid completely or a parallel-type microgrid at the islet operation mode. According to the invention, the refined operation of the microgrid can be improved by fully utilizing the energy storage equipment, and the system spared level, the operation stability, the power supplying reliability and recycled energy source utilization ratio are improved.

Description

technical field [0001] The invention belongs to the technical field of smart microgrids, and in particular relates to a steady-state operation strategy for isolated microgrids containing wind, diesel and storage. Background technique [0002] The microgrid combines distributed power sources, loads, energy storage equipment, and control devices to form a controllable and dispatchable unit that provides users with various energy forms such as electric energy and heat energy, and has two basic operation modes: grid-connected and off-grid. . The distributed power in the microgrid can contain a variety of energy forms, including renewable energy such as wind and rain, non-renewable energy, and micro gas turbine power generation systems. Refrigeration, improve multi-level utilization efficiency of energy. The micro-grid coordinates the contradiction between the large power grid (distribution network) and the direct grid-connected power generation of distributed power generation....

AI Technical Summary

Problems solved by technology

The current research and development work is mainly biased towards the planning stage, considering the economic operation and energy optimization of a single or partial operation mode and power supply equipment in a certain period of time, lack of consideration of the stability and reliability of the microgrid, and insufficient consideration of energy storage equipment The actual operation of the microgrid and its role of "lubrication" and "buffering" in the microgrid with renewable energy have not done a good job in the "top-level design" of the microgrid's operation strategy and operation mode

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