Electric network destabilization on-line automatic recognition method based on phasor measuring technique

Abstract

The online automatic identification method of power grid disturbance based on phasor measurement technology includes the following steps: (1) Using the real-time data collected by the phasor measurement unit, based on the pattern analysis theory, according to the variable law of the electrical parameters of the power grid such as voltage and current, infer Whether there is a short-circuit disturbance and short-circuit equipment in the power grid; (2) Using the real-time data collected by the phasor measurement unit, based on the model analysis theory, according to the variable rules of the electrical parameters of the power grid such as power and frequency, infer whether there is a machine-cutting disturbance in the power grid . The method of the present invention comprehensively considers the characteristics of various state quantities that characterize the operating state of the power system, and extracts a small number of useful feature components that can distinguish disturbance types, and the method can quickly and accurately identify short-circuit and machine-cut disturbances in the power grid , assist the dispatcher to deal with the fault, and prevent the further expansion of the fault range.

Description

technical field [0001] The invention belongs to the technical field of power grids, and more precisely, the invention relates to a method for on-line identification of power grid disturbances. Background technique [0002] With the cross-regional interconnection of my country's power system, the scale of the power grid is getting larger and the structure is becoming more and more complex. Although the large power grid has obvious advantages, it also brings potential safety problems. For example, some disturbances in the local power grid, especially short-circuit faults, etc., will affect the adjacent large areas. If not handled properly, it may expand to Systematic accidents may even lead to the collapse of the entire system, causing large-scale power outages. [0003] The new-generation wide-area measurement system based on the synchrophasor measurement unit uses computer technology and modern high-speed digital communication network to realize the synchronous sampling of ...

AI Technical Summary

Problems solved by technology

Although the large power grid has obvious advantages, it also brings potential safety problems. For example, some disturbances in the local power grid, especially short-circuit faults, etc., will affect the adjacent large areas. If not handled properly, it may expand to Systematic accidents may even lead to the collapse of the entire system, causing large-scale power outages

Images