Double-layer robust state estimation method and system of electric heating comprehensive energy system

Abstract

The invention provides a double-layer robust state estimation method of an electric heating comprehensive energy system. The method comprises: acquiring electric power system quantity measurement andthermodynamic system quantity measurement of the electric heating comprehensive energy system, wherein the thermodynamic system quantity measurement comprises hydraulic network quantity measurement and thermodynamic network quantity measurement; inputting the power system quantity measurement and the hydraulic network quantity measurement into a power system hydraulic network state estimation model to obtain a power system state variable estimated value, a hydraulic network state variable estimated value, a hydraulic network branch flow estimated value and a node injection flow estimated value; and inputting the hydraulic network branch flow estimated value, the node injection flow estimated value and the thermodynamic network quantity measurement into the thermodynamic network state estimation model to obtain a thermodynamic network state variable estimated value. The state estimation model of the thermal power network considers inter-node temperature constraints and thermal power measurement construction, the measurement redundancy of the thermal power network part is equivalently increased, and the accuracy of the state variable estimated value of the thermal power network partis improved.

Description

technical field [0001] The invention belongs to the field of comprehensive energy state evaluation, and in particular relates to a double-layer tolerance state estimation method and system for an electrothermal comprehensive energy system. Background technique [0002] The integrated energy system is considered to be the main form of energy application in the future human society. With the application and development of various energy conversion equipment (such as combined heat and power CHP, combined heat and power refers to the use of fossil fuels, residual energy, renewable energy, electric energy and other ways to simultaneously generate electrical energy and available heat), various The coupling of forms of energy (such as electric energy, thermal energy, natural gas energy, etc.) is gradually strengthened. Among them, the coupling of electrical energy and thermal energy is one of the main application forms of integrated energy systems. In order to realize the compreh...

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Problems solved by technology

However, this method has the following problems: the thermal system modeling does not consider the constraint relationship between node temperatures and thermal power measurement, resulting in a relatively large error in the estimated value of the thermal system state variables; due to the introduction of auxiliary variables, the power system state variables The number of increases equivalently, while the number of measurements remains unchanged, resulting in the loss of part of the measurement redundancy in the solution process

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