Generalized load joint probability modeling method considering node spatial correlation of wind power plant

Abstract

The invention discloses a generalized load joint probability modeling method considering node spatial correlation of a wind power plant. The method comprises the following steps: step 1 of dividing a root bus node connected with each wind power plant into a power characteristic and a load characteristic according to the respective power flow; step 2 of performing interval refinement on each root bus node respectively according to the active power, and making a statistic of the probability information of each root bus node; step 3 of calculating the relevant characteristic parameters between adjacent node power intervals by using a spatial correlation method aiming at a node region correlation and bringing the relevant characteristic parameters into the characteristic leaning of the node; adopting the RBF (Radial Basis Function) neural network learning train and extracting the node characteristics of an interval set, and establishing a joint probability model structure. The relevant parameter matrixes are blended into the RBF neural network modeling, and the adjacent node voltage is included in the node characteristic learning, thus the established model is more comprehensive. Simulation shows that the fitting error of each segment is smaller and the fitting effect is good.

Description

technical field [0001] The invention relates to a modeling method, in particular to a generalized load joint probability modeling method considering node space correlation including wind farms. Background technique [0002] Nowadays, resources are increasingly scarce and environmental problems are becoming more and more prominent. Clean energy power generation is considered to be an effective means to solve energy and environmental problems. Under this background, the installed capacity of wind power has developed rapidly. However, in recent years, with the large-scale access of wind power and other new energy sources, it has had a series of impacts on the safe and stable operation of the power grid. The connection of wind power has changed the situation that the load simply consumes power, making it possible for the load node to send power back to the grid. Moreover, wind farm groups connected to multiple root bus nodes and geographically adjacent are often in the same win...

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Problems solved by technology

However, current studies considering wind power correlation mainly focus on wind power forecasting [13] , wind power system reliability assessment and probabilistic power flow calculation research, the consideration of correlation factors is rarely involved in the research field of generalized load modeling

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