Monitoring method and device of power system

Abstract

The invention discloses a monitoring method of a power system, comprising the following steps of: acquiring a running state signal of the power system in real time by a sensor positioned in a power grid; sampling the running state signal by taking a second pulse signal of a satellite synchronous clock as a sampling reference signal and outputting the acquired data to a function application unit of a data application layer through an optical fiber communication interface by a data acquisition unit; and analyzing and processing the acquired data and transmitting the processed result to a main monitoring station through the function application unit. The invention integrates functions of phasor quantity monitoring, fault recording, traveling wave fault location and the like into a monitoring device, considers the expanding demand of a hardware platform on realizing an IEC61850 communication protocol system in the selection of the hardware platform and realizes the monitoring in the whole process of the running state of the power system. The functions realized by the three sets of traditional equipment are realized by one set of equipment, and the secondary wiring is reduced, so that the maintenance cost and the asset investment can be greatly reduced.

Description

technical field [0001] The invention belongs to the monitoring technology of electric power system, in particular relates to a monitoring method which integrates multiple monitoring functions into one device, and relates to the device involved in adopting the method. Background technique [0002] With the initial formation of the national synchronous interconnected power grid, facing such a large-scale AC weak connection and AC-DC hybrid power grid, the dynamic characteristics of the power grid are becoming increasingly complex, and the fault location, fault analysis and monitoring, and dynamic characteristic analysis of the power grid have become more important; With the rapid development of computer technology, communication technology and mathematical tools, power system monitoring technology has also made great progress, providing a powerful means for real-time stability monitoring and control of power systems. A large number of power system phasor measurement devices, f...

AI Technical Summary

Problems solved by technology

Phasor measurement devices generally have the function of transient wave recording, but the current communication protocol does not make clear regulations on the transmission protocol of transient state wave recording data, and the phasor measurement device does not provide practical functions for fault recording. Such as data analysis, management, fault information summary, etc.

At the same time, because each device needs to be individually assembled and wired, this not only causes a large amount of repeated hardware investment, but also causes the complexity of the secondary wiring on site.

Images