Alternating current and direct current interconnected power grid wind and fire coordination dynamic economy scheduling optimization method

Abstract

The invention discloses an alternating current and direct current interconnected power grid wind and fire coordination dynamic economy scheduling optimization method and belongs to the technical field of electric power scheduling automation. The method comprises the following steps: dynamic economy scheduling optimization fundamental data is obtained, a main model for dynamic economy scheduling optimization and sub-models for a plurality of periods of time are constructed; the main model for dynamic economy scheduling optimization is subjected to solving operation; an optimal solution is obtained; a calculation result is transmitted to the sub-models for the plurality of periods of time; the optimal solution for the main model is substituted into the sub-models and serves as a known condition for constructing a sub-model constraint, optimization objects of all the sub-models are subjected to parallel computing and verifying operation; if the optimization objects omega of all the sub-models are 0 or reach a maximum number of iterations, the obtained result is used as an optimal solution for the alternating current and direct current interconnected power grid wind and fire coordination dynamic economy scheduling optimization. The method disclosed in the invention can be used for optimizing a current electricity generating plan for an alternating current and direct current interconnected power grid containing wind power and thermal power; calculation precision and calculation efficiency are effectively improved, safety of a power generation and transmission plan is safeguarded, and important practical significance and good application prospects can be realized.

Description

technical field [0001] The invention belongs to the technical field of power dispatching automation, and in particular provides an optimization method for wind and fire coordination dynamic economic dispatching of an AC / DC interconnected power grid based on Benders' decomposition method. Background technique [0002] In recent years, wind power and UHVDC transmission technology have achieved leapfrog development in China. By the end of 2014, the cumulative grid-connected capacity of full-caliber wind power in China had reached 95.8GW, a year-on-year increase of 25.6%. Inter-provincial resource allocation and renewable energy consumption are playing an important role. According to the "Energy Development Strategic Action Plan (2014-2020)" issued by the State Council, during the 13th Five-Year Plan period, my country will continue to vigorously develop wind power, focusing on the planning and construction of nine large-scale modern wind power bases such as Jiuquan in Gansu and...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an AC-DC interconnected power grid wind and fire coordination dynamic economic dispatch optimization method. The present invention can finely consider capacitance, Reactor daily switching times limit, DC transmission operating characteristics, active and reactive power coupling characteristics of double-fed wind turbines, coupling characteristics between time intervals and other complex constraints, through the active output of the unit, the internal control parameters of the DC system, the internal operating parameters of the wind turbine and the capacitor Coordinated optimization of switching / reactor switching maximizes the benefits of grid active and reactive power coordination optimization; through careful consideration of AC power flow constraints and DC system steady-state operation constraints, the security of power generation and transmission plans is effectively guaranteed; a system suitable for the present invention is constructed The feasibility of the Ben Des cut constraints, to achieve the consideration of AC and DC power grid operating constraints, doubly-fed wind turbine operating constraints and the dynamic economic dispatching optimization problem of the capacitor / reactance operating characteristics of the main and sub-problem coordinated optimization, while ensuring the optimal solution of the model Improve computing efficiency

Images