Method, for positioning power system power oscillation disturbance source in real time, based on SCADA (supervisory control and data acquisition) data

Abstract

The invention relates to a method, for positioning power system power oscillation disturbance source in real time, based on SCADA (supervisory control and data acquisition) data. The method includes the steps of firstly, calling a time sequence database interface of an EMS (enhanced message system) to obtain an active value of power equipment; secondly, calling an oscillation feature iterative function, inputting new data on the basis of a previous state, calculating feature quantity of active oscillating of one grid equipment, comparing with a preset fixed value, and returning equipment state; and thirdly, positioning a disturbance source in real time, and positioning the equipment, which is triggered to oscillate firstly, as the disturbance source. By the method, data accuracy is improved, practicality level is improved, investment is saved greatly, and convenience and practicality are achieved.

Description

technical field [0001] The invention relates to a method for real-time positioning of a power system power oscillation disturbance source based on SCADA data, and belongs to the transformation technology of a method for real-time positioning of a power system power oscillation disturbance source based on SCADA data. The invention belongs to the field of electric power dispatching automation, and relates to the real-time positioning technology of the power oscillation disturbance source of the electric power system. Background technique [0002] In the power system, when the generators run in parallel through the transmission line to supply power, continuous oscillation between the rotors of the generator may occur under certain operating conditions, causing corresponding oscillations in the bus voltage and power on the transmission line, affecting the normal operation of the power In severe cases, the power system will lose synchronization and even collapse. Since the direc...

AI Technical Summary

Problems solved by technology

[0007] All available research results show that the research on low-frequency oscillation disturbance source location technology is still in the stage of simulation and analysis, and it is difficult to provide real-time decision-making information during production and operation. Engineering applications that have not yet been practically realized

[0008]2) The distribution of PMU is limited and the monitoring range is incomplete

[0010]Contrary to RTU, PMU is not a conventional collection device for plant construction, it needs to be specially deployed, and is generally only deployed in plants with serious stability problems. Although the system has increased investment and connected a large number of PMU devices, the problem of limited PMU distribution and incomplete monitoring range is still very prominent

[0011]3) Inadequate maintenance and low data accuracy

[0012]Because the PMU is an additional device for remote data collection, it has little impact on the real-time operation of the power grid. There are deviations in operation, which often cause data problems

[0013]The master station often accesses PMU data by building a special WAMS (Wide Area Measurement System) system, which is difficult to integrate with the EMS system, and these The system usually lacks professional staff and maintenance is difficult

[0014]4) Implementation costs are too high

[0015]The wide-area monitoring system needs to rebuild the data collection framework, and the factory station needs to specially deploy PMU devices. The application of the main station system is complicated, which will inevitably lead to a significant increase in implementation costs

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