Virtual energystorage based electric heating micro-grid connecting line power fluctuation suppression method

Abstract

A virtual energy storage based electric heating micro-grid connecting line power fluctuation suppression method is disclosed. Firstly, a virtual energy storage system model of fusion heat pump, gas turbine and building energy storage is constructed by means of heat storage capacity of building on user side of electric heating micro-grid. By collecting the real-time power of renewable energy and user load, Considering the state of charge of supercapacitor and the state of virtual energy storage system, the target power of tie-line is determined to realize the power smoothing of tie-line in micro-grid. Finally, the final output of controllable equipment is given by calculating and correcting the pre-output of controllable equipment. The invention can regulate the output of the virtual energystorage system while meeting the constraint of the room temperature, and distributes the fluctuating power of the tie line of the electric heating micro-grid between the virtual energy storage (heatpump, micro-gas turbine) and the super capacitor in cooperation with the charge and discharge of the super capacitor, thereby improving the absorbing capacity of the distributed power supply and optimizing the comprehensive utilization efficiency of the energy.

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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