Data communication delay estimation method for wide-area monitoring system main station and PMU

Abstract

Segmentation calculation is carried out on a delay and a corresponding delay calculation model is put forward for each part, so that the accuracy of the calculation result is enhanced effectively andthe quantitative calculation problem of the communication delay in a wide-area monitoring system is solved. The invention discloses a data communication delay estimation method for a wide-area monitoring system main station and a PMU. On the basis of function modeling and segmentation calculation methods, sending rates and equivalent bandwidths of sub stations at which phasor measurement units ofall time points are located are described by means of functions according to information flow message formation and a sending cycle and the accuracy of the delay calculation is guided.

Description

technical field [0001] The invention belongs to the communication field, and in particular relates to a method for estimating time delay of data communication between a main station of a wide area monitoring system and a PMU. Background technique [0002] At present, the wide-area measurement system (WAMS) based on the phasor measurement unit (PMU) has been widely used in my country's power system. Through the gradual layout of the phasor measurement unit at the key measurement points of the entire network, real-time and efficient collection of grid data is realized. Work, provide real-time monitoring and analysis of the power grid, and grasp the operating status of the power grid. [0003] The reliability and timeliness of WAMS system data are the main factors affecting the performance of the real-time closed-loop control system of the wide-area power grid. It has great randomness and uncertainty, which has a negative impact on the damping control of the wide-area power syst...

AI Technical Summary

Problems solved by technology

However, in the current segmental delay calculation method, there is no targeted modeling scheme for the transmission delay part, and the qualitative analysis is mostly performed with protocol logic and related measurement or simulation data, and the delay calculation cannot be performed purely by mathematical methods. The calculation of the overall transmission delay is a big challenge

At the same time, in most wide-area monitoring system delay calculation methods, the entire network is used as the calculation object, and specific packet analysis cannot be carried out in a targeted manner, and the structure of the data flow is not considered.

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