Energy storage system micro-grid capable of inhibiting power fluctuation

Abstract

The invention discloses an energy storage system micro-grid 10 capable of inhibiting power fluctuation. The micro-grid 10 comprises photovoltaic power generation equipment 12, an energy storage system 13, wind power generation equipment 14, an AC / DC bidirectional current conversion module I 16, a direct-current bus, an AC / DC bidirectional current conversion module II 15, a load 17 and a monitoring device 11, wherein the AC / DC bidirectional current conversion module I 16 is used for connecting and isolating the photovoltaic power generation equipment 12 from the direct-current bus; the AC / DC bidirectional current conversion module II 15 is used for connecting the photovoltaic power generation equipment 12 with the direct-current bus. The micro-grid disclosed by the invention has the advantages that firstly, the output power change situation of the wind power generation equipment and the photovoltaic power generation equipment can be accurately predicted, secondly, the power change of a connecting point of the micro-grid with a large power grid and the power change of the load inside the micro-grid can be accurately predicted, and thirdly, large power grid scheduling requirements and the operation situation of the energy storage system are both considered in a control strategy, active power and reactive power can be simultaneously provided for the large power grid, the scheduling requirements of the large power grid and the requirements of the load inside the micro-grid are met, at the same time the power fluctuation of the micro-grid can be effectively inhibited, the power supply reliability is also achieved, the security of the micro-grid is ensured, and the service life of equipment inside the micro-grid is prolonged.

Description

Technical field [0001] The invention relates to a microgrid with an energy storage system capable of smoothing power fluctuations. Background technique [0002] Micro-grid (Micro-Grid), also translated as micro-grid, is a new type of network structure. It is a system unit composed of a group of micro-power sources, loads, energy storage systems and control devices. It can realize an autonomous system of self-control, protection and management. , it can run in parallel with the external power grid or run in isolation. [0003] As a supplement to the ultra-high voltage, long-distance, and large-grid power supply mode, the micro-grid based on wind power and photovoltaic power generation represents a new development direction of the power system. Wind energy and solar energy resources are clean and renewable energy, but there are problems of randomness and volatility, which bring a series of impacts to the power grid. The degree of power fluctuation directly affects the origin...

AI Technical Summary

Problems solved by technology

[0005] However, it is relatively expensive to configure a large-scale energy storage system. Therefore, it is necessary to comprehensively consider the cost of transmission engineering, the cost of energy storage system, the revenue of power transmission, and the revenue of energy storage system. Method for optimal configuration of energy storage system at capacity

Images