A power system fault monitoring and alarm system

Abstract

The invention discloses a power system fault monitoring and alarm system, which relates to a power system and includes: an identification parameter matrix determination module for determining the identification parameter matrix; a data collection module for collecting power supply voltage phasors on engine nodes and load nodes The load voltage and current phasor on the above; the intermediate data solving module is used to solve the η after adding the nth sampling data (n‑1,add n) The estimated value of the identification parameter matrix recursive solution module, which is used to solve the estimated value of the identification parameter matrix after removing the n-p sampling data; the admittance matrix change solution module, which is used to solve the items in the charge-transmission admittance matrix Rate of change; a fault route determination module, used to extract fault items whose rate of change in the charge-delivery admittance matrix is ​​greater than a preset value, and determine the fault line. The invention eliminates the data in the preceding item, so that the amount of calculation processing is reduced, and the data that is far away from the current moment is eliminated, thereby effectively improving the estimation accuracy of the system and effectively identifying the fault route of the power system.

Description

technical field [0001] The invention relates to the field of power systems, in particular to a power system fault monitoring and alarm system. Background technique [0002] The power system is an electric energy production and consumption system composed of power plants, power transmission and transformation lines, power supply and distribution stations, and power consumption. Its function is to convert the primary energy in nature into electric energy through the power generation device, and then supply the electric energy to various users through power transmission, transformation and distribution. In order to realize this function, the power system also has corresponding information and control systems in various links and different levels to measure, adjust, control, protect, communicate and dispatch the production process of electric energy, so as to ensure that users obtain safe and high-quality electric energy. . [0003] The main structure of the power system inclu...

AI Technical Summary

Problems solved by technology

[0005] Since the power system is a complex time-varying system, with the operation of the system, the amount of processed data is increasing, which greatly increases the computer processing power required to process data, making data processing slower or processing data costs improve

In addition, in the prior art, the recursion of the least squares method is carried out by weighting the forgetting factor. On the one hand, the old data cannot be completely cleared. On the other hand, in some existing technologies, the total weighted value of the old data and the new data Greater than 1 makes the solution value offset

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