A multi-period power flow optimization method for electricity-gas interconnected integrated energy system

Abstract

The invention discloses a multi-period power flow optimization method for electricity-gas interconnected integrated energy system, which comprises: (1) obtaining electricity-gas interconnected integrated energy system information; (2) construct electricity-gas interconnected integrated energy system multi-period scheduling model according to the system information; (3) converting the nonlinear andnon-convex equations of gas pipeline flow and pressure in the multi-period dispatching model of electricity-gas interconnected integrated energy system into the natural gas power flow model with enhanced second-order cone constraints. (4) solving the converted the multi-period dispatching model of electricity-gas interconnected integrated energy system and the obtaining optimal solution. (5) by taking the optimal solution as the initial value, performing linearization iterative solution on the converted the multi-period dispatching model of electricity-gas interconnected integrated energy system by using DCP method until the natural gas system meets the power flow constraint strictly. (6) outputting The final solution at the end of iteration as the optimal power flow solution in the future. The invention can effectively carry out multi-period power flow optimization.

Description

technical field [0001] The invention relates to the technical field of electrical interconnection, in particular to a multi-period power flow optimization method for an electrical-gas interconnection integrated energy system. Background technique [0002] In view of the increase in the proportion of gas turbines on the power generation side and the application of power-to-gas technology in the power system, bidirectional energy flow between the power system and the natural gas system has become possible. The development of natural gas has transformed the power system and the natural gas system from mutual independence to mutual coupling (gradually developed into strong coupling). Therefore, it is necessary to break the existing mode of independent planning and operation of energy systems, and construct a unified integrated energy system that interconnects multiple heterogeneous energy sources. Furthermore, Energy Internet can be understood as the deep integration of Interne...

AI Technical Summary

Problems solved by technology

However, for the natural gas system, the existing power flow model linearization model adopts the piecewise linear method, which needs to introduce a large number of integer variables, which greatly increases the computational complexity. If a small number of piecewise integer variables are considered, the piecewise linear accuracy cannot meet the requirements of engineering practice.

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