Power system fault monitoring and alarming system

Abstract

The invention discloses a power system fault monitoring and alarming system, and relates to a power system. The system disclosed by the invention comprises an identification parameter matrix determination module, a data acquisition module, an intermediate data solving module, an identification parameter matrix recursive solving module, an admittance matrix change solving module and a fault line determination module, wherein the identification parameter matrix determination module is used for determining an identification parameter matrix; the data acquisition module is used for acquiring a power supply voltage phasor on an engine node and a load current and current phasor on a load node; the intermediate data solving module is used for solving the estimated value of eta<n-1, add n> after the nth sampling data is added; the identification parameter matrix recursive solving module is used for solving the estimated value of the identification parameter matrix after the removal of the (n-p)th sampling data; the admittance matrix change solving module is used for solving the change rate of each item in a load-sending admittance matrix; and the fault line determination module is used forextracting fault items with the change rate being greater than a preset value in the load-sending admittance matrix and determining the fault line. According to the invention, the previous data is removed, so that the calculation processing amount is reduced. The data far away from the current moment is removed, so that the estimation precision of the system is effectively improved, and the faultline of the power system can be effectively identified.

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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