Power fluctuation stabilization method of electric heating microgrid tie-line based on virtual energy storage

Abstract

A virtual energy storage-based power fluctuation stabilization method for electric heating microgrid tie-lines. Firstly, based on the heat storage capacity of buildings on the user side of the electric heating microgrid, a virtual energy storage system model that integrates heat pumps, gas turbines, and building energy storage is constructed; The micro-grid energy control center collects the real-time power of renewable energy and user loads, comprehensively considers the state of charge of the supercapacitor and the state of the virtual energy storage system, and then determines the target power of the tie-line to achieve the power smoothing target of the tie-line of the micro-grid. After calculating the pre-output of the controllable equipment and correcting it, the final output of the equipment is given; the invention can regulate the output of the virtual energy storage system while satisfying the room temperature constraints, and at the same time cooperate with the charging and discharging of the supercapacitor to control the fluctuation power of the electric heating micro-grid connection line in the virtual Energy storage (heat pumps, micro gas turbines) and supercapacitors are allocated to optimize the comprehensive utilization efficiency of energy while improving the consumption capacity of distributed power sources.

Description

technical field [0001] The invention relates to a technology in the field of intelligent control of a multi-energy grid, in particular to a method for stabilizing power fluctuations of electric heating microgrid tie lines based on virtual energy storage. Background technique [0002] At present, for the power smoothing technology of the micro-grid connection line, the fluctuating power is mainly stabilized by controlling the charging and discharging of electric energy storage devices such as batteries and supercapacitors. Some technical solutions propose to adjust the low-pass filter time constant in real time based on the state of charge of the battery to smooth target power fluctuations and reduce system energy storage capacity; some literature proposes to use hybrid energy storage to distribute wind power fluctuations between batteries and supercapacitors. These technologies smooth the target power through electric energy storage devices, but the high investment cost of e...

AI Technical Summary

Problems solved by technology

At present, the analysis of the relationship between electricity, heat, and energy conversion is not deep enough. Based on the background of the electricity market, there are methods to establish an electric-heat joint model with the goal of reducing the fluctuating power of the tie line and the operating cost of the micro-grid, and determine the power output of each equipment, but there is no such method. Consider the specific impact of equipment heating capacity on user-side heat consumption

These technologies are based on combined heat and power systems, and have made breakthroughs in power smoothing technology, but the type of heating equipment is relatively single, and the deep coupling of electric energy and thermal energy has not yet been realized.

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