Network on-line live line measurement method for line parameter of power system

Abstract

The invention relates to a network on-line live line measurement method for the line parameter of a power system. A measuring center performs network on-line live line real-time measurement according to sets of computer networked data and networked instructions organized by a line parameter measuring system on the basis of a specific sequence. The method sequentially comprises the following steps of: 1) accessing a global positioning system (GPS) signal to a data acquisition device in each transformer substation and correctly running; 2) requesting to establish transmission control protocol (TCP) connection, sending a device configuration information reading command and a real-time data command to the data acquisition device, receiving real-time data and establishing a real-time running chart; 3) actively retrieving the data acquisition device in each transformer station, monitoring the running condition of each line in real time and automatically measuring the line parameter; and 4) storing a line parameter measured value in a database. The data acquisition device which is put into operation and networked on site is utilized, and a new device is not required to be arranged, so that measurement workload can be obviously reduced, measurement cost is saved, power failure frequency is low, and power failure time is short; and the method is easy to operate, and safe and reliable.

Description

technical field [0001] The invention relates to monitoring and recording, in particular to an on-line electrification measurement method for line parameter network of a power system. Background technique [0002] The accuracy of line parameters is directly related to the accuracy of protection action and fault location. "National Standards of the People's Republic of China—Technical Regulations for Relay Protection and Safety Automatic Devices" stipulates that the zero sequence parameters of the line must adopt the measured values. The existing measurement method is to build a measurement platform to measure the current, voltage and other information of the line when the line to be tested is completely out of power and off the grid, and then obtain the actual transmission line parameters. At present, there are more and more mutual inductance lines in the power grid. If the zero-sequence self-inductance of a new line is to be measured, due to its coupling with other operatin...

AI Technical Summary

Problems solved by technology

At present, there are more and more mutual inductance lines in the power grid. If the zero-sequence self-inductance of a new line is to be measured, due to its coupling with other operating mutual inductance lines, it is necessary to measure all coupled lines at the same time, resulting in a very heavy measurement workload. huge

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