System and method for monitoring power utility status by online measurement of circuit parameters

Abstract

The present invention relates to a system and a method for monitoring a power facility by measuring from online a line parameter of the power facility that is in operation, and the system for monitoring the power facility, according to the present invention, sets a measurement time and selects a facility to be measured in accordance with external input, receives current and voltage data which are measured from the facility to be measured, extracts the current and voltage data that are simultaneously measured at the measurement time that is set, by referencing time information that is tagged on the current and voltage data that are inputted, removes zero-phase-sequence component from the current and voltage data, outputs the line parameter with respect to the facility to be measured that is selected by using the current and voltage data from which the zero-phase-sequence component is removed, determines the electrical status of the facility including malfunction and various connection statuses depending on whether the size or the increase / decrease rate of the line parameter that is outputted is beyond a predetermined standard value to output a status notification message or a trip signal, thereby monitoring / controlling the status of the facility to be measured.

Description

technical field [0001] The present invention relates to a system and method for monitoring the state of electric facilities by measuring circuit parameters on-line. The system and method can measure and monitor line parameters (resistance R, inductance L, capacitance C and g) to correctly diagnose and monitor the status of working electrical facilities. Background technique [0002] Changes in the state of the utility are expressed as changes in line parameters (resistance R, inductance L, capacitance C, and leakage conductance g). However, since there has been no method for measuring line parameters of operating electric facilities until now, by attaching a plurality of sensors to electric facilities and sensing changes in temperature, pressure, and vibration, partial discharge phenomena, etc., which are The state of the electrical utility is evaluated and used from secondary physical phenomena arising from changes in line parameters of the utility. [0003] In the case o...

AI Technical Summary

Problems solved by technology

For example, when an abnormal state is sensed by temperature, since the temperature is not measured from all parts of the facility but overheating or temperature change is detected only at the portion where the temperature sensor is installed, there is an area where the abnormal state is not sensed

[0004] In addition, since there is a time delay until the appearance of a secondary physical phenomenon caused by a change in the power facility itself, there is a certain limit to the monitoring of the abnormal state of the facility, and specifically, in the transmission line installed across a wide area In cases where multiple sensors are installed, this is impractical due to many difficulties in maintenance

Images