A method for judging overcurrent false alarms of high-voltage shunt reactors in power systems

Abstract

The invention discloses an electric power system high voltage parallel reactor overcurrent false alarm discrimination method. The method comprises steps that s1, modeling, a structure array Origin_Data, Structure{time_t Time_Data; double Voltage; intmessage;}Origin_Data[X] is defined, wherein time_t represents the time type, double represents the double floating point number, int represents the integral type, Time_Data represents the data measurement time, Voltage represents the voltage value, message represents whether a current alarm occurs in Time_Data, and X represents the element quantityand at least comprises 44640 elements; through system message measurement and control, whether the current alarm occurs in the corresponding time is determined, if an overcurrent message occurs, message variables of the corresponding elements of the Origin_Data matrix are made to be 1, otherwise, if no message is issued, message variables of the corresponding elements are made to be 0; and s2; data pre-processing, a value domain of the voltage is divided into intervals at same widths, the widths of the intervals are Y, the median of the intervals is taken as a classification value representing a data value of the intervals, and the quantity of the intervals is number_area.

Description

Technical field [0001] The invention relates to an alarm identification method, and in particular to a method for identifying overcurrent false alarms of high-voltage parallel reactors in power systems. Background technique [0002] High-voltage shunt reactors are generally connected between the end of ultra-high-voltage transmission lines and the ground. They play the role of compensating the reactive power charged to the ground when the transmission line is lightly loaded and suppressing power frequency over-voltage. However, in the actual operation of the power system, overcurrent alarms of high-voltage shunt reactors often occur frequently, which affects the safe and reliable operation of the power system. [0003] Engineering experience shows that there are often two reasons for overvoltage alarms in high-voltage shunt reactors. The first reason is that due to the influence of the operating mode of the power system, the voltage at the connection point of the high-volta...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to distinguish whether the overvoltage alarm is a false alarm, which is calculated by the current flowing through the high-voltage shunt reactor, because the accuracy of the voltage transformer and current transformer, and the system voltage itself have errors, resulting in inaccurate judgment results , the purpose is to provide a method for judging false overcurrent alarms of high-voltage shunt reactors in power systems, so as to solve the above problems

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