Unit combination optimization method considering comprehensive coordination configuration of electric power system flexibility

Abstract

The invention discloses a unit combination optimization method considering comprehensive coordination configuration of power system flexibility. The method comprises the following steps: establishinga system operation flexibility comprehensive coordination supply and demand balance mechanism for changing flexibility potential release by steady-state frequency allowable deviation; constructing a power system operation flexibility comprehensive coordination configuration strategy by considering the primary frequency modulation flexibility and the secondary frequency modulation flexibility of the system; and establishing a multi-target unit combination model for comprehensive coordination configuration of the operation flexibility of the power system, and solving the established model by using a CPLEX tool and an extended e constraint method, thereby obtaining an optimal configuration result of the operation flexibility of the system. The uncertainty capacity of the system is depicted from the perspective of flexibility, and the flexibility problem that traditional standby configuration cannot be described is solved; the comprehensive coordination and balance mechanism for the systemoperation flexibility broadens the limitation of the system on the steady-state frequency, and improves the uncertainty coping capability of the system.

Description

technical field [0001] The invention belongs to the field of power system dispatching, and in particular relates to a unit combination optimization method considering power system flexibility, comprehensive coordination and configuration. Background technique [0002] Due to the geographical distribution of wind resources in my country and the characteristics of energy consumption, the large-scale utilization of wind energy will cause some isolated grids with high penetration rate wind power to appear in the power system. In the case of high-penetration wind power grid-connected, on the one hand, the uncertainty fluctuation becomes the random fluctuation of "net load" obtained by combining the fluctuation and uncertainty of load and high-penetration wind power, which greatly increases the uncertainty fluctuating power. On the other hand, traditional generators are replaced by large-scale wind turbines, which significantly reduces the system's backup. In the traditional uni...

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Problems solved by technology

[0008]The purpose of this invention is to solve the above problems, describe the ability of the system to deal with uncertainty from the perspective of flexibility, and solve the flexibility problem that cannot be described by traditional standby configuration ; relax the system's restriction on the steady-state frequency, and improve the system's ability to deal with uncertainties

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