A robust scheduling method considering wind power and load prediction uncertainty

Abstract

The invention belongs to the technical field of power system dispatching automation, particularly relates to a robust scheduling method considering uncertainty of wind power and load prediction, whichcomprises the following steps of: describing the correlation between input load fluctuation and a prediction error of wind power output by using a correlation coefficient matrix method, and converting random variables with correlation into mutually independent random variable matrixes by using a Cholesky decomposition method; Constructing a probability density model of prediction errors of wind power output and load fluctuation by adopting non-parameter kernel density estimation; Introducing the direct-current power flow model into a power system dispatching model, and establishing an objective function and a constraint condition under the condition of uncertain factors by taking the minimum total dispatching operation cost of the system as an objective function of the model; adopting Benders decomposition method to solve a UC main problem of a robust SCUC problem, a network security check sub-problem of the UC main problem under a basic scene, and a network security check sub-problemunder an uncertain scene of new energy power generation and load.

Description

technical field [0001] The invention belongs to the technical field of electric power system scheduling automation, and in particular relates to a robust scheduling method considering the uncertainty of wind power and load forecasting. Background technique [0002] The power system scheduling problem is to determine the optimal scheduling scheme and ensure the safe and economical operation of the power system under the goal of minimizing the operating cost of the system, considering various constraints of the system and generating units. The problem of unit combination in power system scheduling mainly includes two aspects: one is the formulation of the decision-making scheme for starting and stopping thermal power units; the other is economic dispatching of the power system. That is, which units are selected for power generation and how to arrange their output in a cycle of power system dispatching. The traditional unit combination constraints include equality and inequali...

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Problems solved by technology

However, it is difficult to find the theoretical global optimal solution directly from the huge discrete variable space for the mixed integer programming problem of the power system dispatching model considering the network power flow limitation.

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