Wind power plant current collection line protection method based on clustering algorithm

Abstract

A wind power plant current collection line protection method based on a clustering algorithm relates to the technical field of electric powers, and comprises the following steps: firstly, establishing a wind power plant model according to an actual wind power plant, and then setting short-circuit faults at different positions in the model; inputting fault information into a clustering algorithm fault protection device for standardization and clustering analysis to obtain a fault clustering center and a non-fault clustering center, and finally standardizing and judging the fault information when an actual wind power plant fails through the clustering algorithm protection device, so as to realize protection of a current collection line. The simulation result shows that even if the data volume is not large, fault information can still be accurately judged, the selectivity requirement of current collection line protection is met, implementation of low-voltage ride through is facilitated, and the stability of a power grid is guaranteed. According to the invention, wind power plant current collection line protection is achieved through a clustering algorithm, and the method is high in visual degree, simple and high in feasibility degree, has good application prospects, and is suitable for large-scale popularization and application.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a method for protecting a wind farm collector line based on a clustering algorithm. Background technique [0002] It is known that the collector line is one of the main devices connecting the wind farm and the power grid. Its wiring form adopts the traditional radial wiring form and adopts the conventional three-stage current protection. When a fault occurs, because the fault current of the collector line is affected by various factors such as the type of fan and the operating state of the fan, the configuration and setting of the traditional relay protection will not be applicable. When a short circuit or disconnection fault occurs, if the protection device cannot Timely and accurate actions will affect the stable operation of the entire wind farm, and have a greater impact on the power grid. The loss cannot meet the power stability requirements. For example, some wind...

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Problems solved by technology

[0005] (2) The wind farm has the characteristics of randomness and volatility, and its fault current is different from that of thermal power plants, so it cannot be adjusted according to the traditional method, etc.

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