Electricity-gas coupling network energy flow solving method considering state variables of energy station

Abstract

The invention provides an electricity-gas coupling network energy flow solving method considering energy collection station state variables. The method comprises the steps that an energy collection station model capable of reflecting the electricity and gas energy flow coupling and conversion relation is established; based on an energy station model, considering a gas turbine and electric compressor equipment in a network, on the basis of original subsystem state variables, adding electricity and gas input variables and electricity and heat output variables of an energy station, deducing a Jacobian matrix and an iteration relation of the energy station, establishing an IEGS multi-energy-flow unified solving model, and establishing an IEGS multi-energy-flow unified solving model; and solving to obtain voltage, phase angle, node pressure and flow calculation results of the system. According to the multi-energy flow solving algorithm considering the EH state quantity, interaction between energy flows is considered, derivation of the Jacobian matrix is simplified, rapid convergence can be achieved, the number of algorithm iterations is reduced, and the calculation efficiency is improved.

Description

technical field [0001] The disclosure belongs to the field of multi-energy flow calculation of integrated energy systems, and in particular relates to a method for solving energy flow of an electric-pneumatic coupling network taking into account state variables of energy gathering stations. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] As a clean and environmentally friendly high-quality energy, natural gas is non-toxic and has a high calorific value. In recent years, the proportion of power generation through gas turbines has gradually increased, and the connection between the power system and the natural gas system has become closer and closer. Therefore, it is necessary to analyze the IEGS (Integrated Electricity and Natural Gas Systems) energy flow coupling and conversion relationship of electrical and gas subsystems. In addition, ...

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Problems solved by technology

Although the energy collection station model can simplify the modeling process of the equipment in the network, the above research has not fully considered the influence of the state variables of the energy collection station on the energy flow iteration in the multi-energy flow unified solution algorithm. The input of EH will change with the output of electricity and thermal loads, and the input of EH will cause the distribution of grid power flow and natural gas energy flow in IEGS. Therefore, the multi-energy flow unified algorithm of IEGS must take the state of EH Considering variables, the document "Probabilistic Energy Flow Analysis of Electric-Pneumatic Hybrid Integrated Energy System" discusses the system model of EH state variables, but it focuses on the analysis of uncertain factors and probabilistic energy flow in the system, and does not analyze the comprehensive Detailed analysis of multi-energy flow solutions for energy systems, involving complex algorithms and poor iterative convergence

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