Multi-zone electricity-heat comprehensive energy system optimization control method considering quantitative heat storage

Abstract

The invention discloses a multi-zone electricity-heat comprehensive energy system optimization control method considering quantitative heat storage, which comprises the following steps: considering the thermal dynamic characteristics of a heat supply pipe network and the computational efficiency demand of multi-zone scheduling, improving and simplifying a heat supply pipe network model based on first-order windward difference, and establishing a virtual heat storage tank model of the heat supply pipe network; establishing a heat storage quantitative index based on the virtual heat storage tank model for quantifying the heat storage level of the primary pipe network, and establishing a quantitative regulation and control index of pipe network heat storage; constructing a regulation and control target penalty term of the heat storage capacity of the pipe network by utilizing the quantitative regulation and control indexes; and constructing a multi-region IPHS optimization scheduling model in combination with the 1-bin unit commitment model, wherein a mixed integer quadratic programming solver is used for solving to obtain an optimization control result of IPHS day-ahead unit commitment and economic scheduling. According to the method, the calculation efficiency is improved, and collaborative optimization of the heat storage capacity of the heat supply pipe network in IPHS scheduling is realized.

Description

technical field [0001] The invention relates to the field of electric-thermal comprehensive energy systems, in particular to an optimal control method for a multi-region electric-thermal comprehensive energy system considering quantitative heat storage. Background technique [0002] With the continuous advancement of urbanization, industrialization, and modernization, the contradiction between the growth of social energy demand and energy shortage and environmental pollution has become increasingly prominent. Breaking through the barriers of various energy subsystem industries and exploring the complementary advantages of multi-energy have gradually become the focus of attention in the energy field. [1] . The integrated power and heating system (IPHS) considers the coupling of the power system and the heating system, and is one of the most common multi-energy flow systems. Electric energy is easy to transmit but difficult to store, while thermal energy is easy to store but ...

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Problems solved by technology

First, the current unit combination model based on [12] The multi-area IPHS dispatching method only considers the economics of the unit, and it is difficult to actively regulate the heat storage of the pipe network in the multi-area heating system. The flexible dispatch of the cogeneration unit will lead to fluctuations in the water temperature of the pipe network, resulting in increased heat loss and accelerated pipe network aging. [13] ;Secondly, the upper and lower limits of pipe network temperature, pipe network capacity, and pipe network heat storage upper and lower limits may be different for different heating systems, and the lack of quantitative control indicators for heat storage in multi-regional heating pipe networks increases the difficulty of regulation [14] ; Finally, in the multi-region IPHS scenario, a large number of nodes and pipeline constraints will bring a lot of computing costs [15] , the heating system models widely used in regional-level IPHS scheduling, such as the node method, are difficult to meet the computational efficiency requirements of multi-regional IPHS scheduling

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