AC/DC power distribution network scheduling method considering wind power uncertainty

Abstract

The invention discloses an AC/DC power distribution network scheduling method considering wind power uncertainty, being characterized in that factors such as a flexible adjustment range, an adjustmentrate and adjustment time are considered; quantitative evaluation is carried out on source network load flexibility resources of the AC/DC power distribution network; an AC/DC power distribution network operation flexibility evaluation index and a calculation method are defined; based on non-parametric kernel density estimation and a confidence interval method, constraint conversion of a power distribution network flexibility demand considering wind power uncertainty is realized; and an implementation scheme of a layered and partitioned scheduling strategy in the AC/DC power distribution network is determined, and a multi-target day-ahead flexible economic scheduling model of the AC/DC power distribution network is established by taking the operation economy and the electric energy qualityof the power distribution network as target functions and taking controllable operation parameters in the converter station and the AC/DC power grid as decision variables. On the premise of ensuringthat the AC/DC power distribution network deals with system uncertainty fluctuation, the system network loss is further reduced, and the node voltage level is improved, and the RES acceptance level isimproved, and the total system scheduling cost is reduced.

Description

technical field [0001] The invention belongs to the field of operation control of power system distribution network, and in particular relates to an AC / DC distribution network dispatching method considering wind power uncertainty. Background technique [0002] The deteriorating environment and the shortage of traditional energy have further promoted the development of renewable energy power generation technology. The future distribution network must meet the requirements for access and consumption of distributed renewable energy with high penetration rate. As the development trend of the future distribution network, the AC and DC distribution network is an important technical method to solve the widespread access and consumption of high-penetration distributed generation (DG) in the distribution network. However, the volatility, randomness and uncertainty of renewable energy (Renewable Energy Source, RES)'s own power output, the mutual coupling of energy storage devices in t...

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Problems solved by technology

[0004] However, there are still few flexibility characterization methods, calculation methods and evaluation methods for the operation of AC and DC distribution networks, and the precise operation loss, operation characteristics and voltage control methods of flexible DC devices and the operation scheduling of controllable elements in the distribution network are also taken into account. Research is not perfect

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