Abstract
The reserve scheduling is important for integrated energy systems to cope with sudden disturbances such as fluctuations of renewable energy. The existing reserve scheduling approaches for integrated energy systems need iterations of calculation to guarantee the feasibility of the gas-fired units’ reserve, leading to problem of high computational burden. In this paper, a two-layer optimization model is proposed to set the boundary of the gas-fired units’ power and reserve, so that the scheduling result can meet the gas network constraints. The proposed two-layer optimization framework can avoid repeated loop iterations, resulting in low computational complexity. Testing results verify the effectiveness of the proposed method.
Highlights
With the development of society and increasing consumption of energy, fossil energy shortages and environmental pollution cannot be ignored
Reference [25] proposes a novel optimal scheduling model based on chance-constrained programming to seek the minimum generation cost for a small-scale integrated energy system
A. 6-BUS-6-NODE integrated electricity and natural-gas energy system (IEGS) The 6-bus power system depicted in Figure.2 has three generators, seven transmission lines, and three loads
Summary
With the development of society and increasing consumption of energy, fossil energy shortages and environmental pollution cannot be ignored. Reference [24] proposes a robust security-constrained unit commitment model to enhance the operational reliability of integrated electricity-natural gas system (IEGS) against possible transmission line outages. Aiming at the problem that the existing scheduling model of IEGS does not fully consider the feasibility of gas-fired units’ reserve, references [26], [27] propose robust economic scheduling and reserve configuration model considering wind power uncertainty and gas network operation constraints. THE IEGS OPTIMIZATION SCHEDULING MODEL WITHOUT CONSIDERING THE FEASIBILITY OF THE GAS-FIRED UNITS’ RESERVE The IEGS model includes the power system and the natural gas system and needs to establish the objective function and constraints on both the integrated electricity and natural gas energy system. The flow conservation equation (37) ensures the nodal balance at the natural gas transmission system
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