Abstract
Large-scale renewable energy integration brings unprecedented challenges to electric power system planning and operation. The paper aims at economic dispatch and the safe operation of high penetration renewable energy power systems. According to the principle of power system dispatchability, the assessment of wind energy accommodation is formulated into a two-stage robust optimization problem with a min-max-min structure. Based on the benders algorithm, the intractable robust optimization problem is transformed into the form of sub-problem and master problem. Strong duality theory and big-M method are used to recast the sub problem into a mixed integer linear programming. The envelope of wind energy accommodation can be obtained by using commercial software to solve the master problem and sub problem alternately. For the realization of arbitrary wind power within the envelope, the amount of wind energy leakage and load shedding in power system operation are acceptable. An example of modified IEEE 39-bus test systems is used to verify the effectiveness and practicability of the evaluation method.
Highlights
Wind power with economic and environmental benefits has been integrated into the large electric power system, which will endanger the security and stability of the power industry [1]
The envelope band of wind energy accommodation is obtained by solving a two-stage robust optimization problem, which can provide warning signals of wind power leakage and load shedding in electric power system operation
The results of numerical studies show that: 1. It is feasible to counterweight the deviation of wind power by correcting the pre-dispatch scheme
Summary
Wind power with economic and environmental benefits has been integrated into the large electric power system, which will endanger the security and stability of the power industry [1]. The evaluation and calculation of wind energy accommodation is a complex problem considering the factors of the generator, transmission lines, and load demand in the regional power system [5]. A large number of reports have analyzed the problem of renewable energy accommodation assessment, there is insufficient research on the unified evaluation framework, which takes into account the power supply, transmission lines, load, and other factors. This paper aims at the dynamic economic dispatch of electric energy system with wind energy and proposes a novel evaluation framework of wind energy accommodation. Based on the dynamic economic dispatch model and two-stage robust optimization technology, an assessment framework of wind energy accommodation taking into wind energy leakage and load demand shedding is proposed; 3.
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