Electric power scheduling flow data abnormity detecting method based on isolation forest algorithm

Abstract

An embodiment of the invention provides an electric power scheduling flow data abnormity detecting method based on an isolation forest algorithm. The method comprises the steps of sampling a data setthrough a system sampling method, establishing sub-forests, and forming a base forest abnormity detector; determining an abnormity condition of data which enter a sliding window through the base forest abnormity detector; performing Bernoulli sampling on the data which enter the sliding window, determining whether the data are stored in a buffer area, and when the data of the sliding window are full, determining a window data abnormity rate in real time; according to a fact that a buffer area data volume and sliding window data abnormity rate exceed threshold values, selecting a model updatingstrategy with a relatively low or relatively high updating proportion; and calculating an abnormity rate difference between each sub-forest and the base forest based on the updated data set, eliminating the sub-forests with relatively large differences, and establishing a plurality of sub-forests for supplementing, and forming a new base forest abnormity detector, thereby realizing updating. Theelectric power scheduling flow data abnormity detecting method can improve power flow data abnormity detecting accuracy.

Description

【Technical field】 [0001] The invention relates to an abnormal detection method of power dispatching data, in particular to a method for detecting abnormality of electric power dispatching flow data based on an isolated forest algorithm. 【Background technique】 [0002] Unified Strong Smart Grid is a new type of grid formed by highly integrating modern advanced sensing and measurement technology, communication technology, information technology, computer technology and control technology with the physical grid based on the physical grid, which includes power generation, transmission, and transformation. , power distribution, power consumption and dispatching links. In the actual work of the power system, dispatching undertakes the functions of commanding, supervising and managing the power production and operation, which is an important guarantee for the safe operation of the power system. With the increasing scale of the power grid, the requirements for the safe and stable o...

AI Technical Summary

Problems solved by technology

The current analysis mode of scheduling data is mainly based on static offline data analysis. This method is not closely integrated with the production and operation system, and there are problems such as the inability to quickly reflect the system operation status and detect abnormal phenomena in time.

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