A method for estimating the time delay of data communication between the main station and pmu in wide area monitoring system
A wide-area monitoring system and data communication technology, which is applied in the field of estimation of data communication delay between the main station of the wide-area monitoring system and PMU, can solve the problem that the data flow structure is not considered, the message analysis cannot be performed, and there is no targeted modeling Solutions and other issues, to achieve accurate and reliable calculation results, simplified components and synchronization delay calculations, and accurate and specific calculations
Active Publication Date: 2022-04-01
WUHAN UNIV
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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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[0036] The present invention is mainly based on communication-related principles, and considers calculating the communication delay characteristics between the master station (control center) of the wide-area monitoring system and each part of the phasor measurement unit by mathematical methods, and proposes a master station (control center) of the wide-area monitoring system Calculation method for data communication delay with phasor measurement unit. This method fully considers the main influencing factors of time delay in each stage, completes the staged calculation of time delay in each part by establishing a suitable calculation model, and finally analyzes the overall time delay. The results obtained by the invention are more scientific and more accurate.
[0037] The method provided by the invention can be used to calculate the time delay of data communication between the master station (control center) of the monitoring system and the phasor measurement unit. see figu...
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In order to solve the problem of quantitative calculation of communication delay in wide-area monitoring system, the accuracy of calculation results can be effectively increased by calculating the delay in segments and proposing a corresponding delay calculation model for each part. The invention discloses a method for estimating the data communication time delay between the main station of a wide-area monitoring system and the PMU, adopts the method of function modeling and segmental calculation, and accurately describes in the form of a function according to the composition and sending cycle of information flow messages The transmission rate and equivalent bandwidth of the sub-station where the phasor measurement unit is located at each time point guides the accuracy of delay calculation.
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...
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IPC IPC(8): H04L43/0852
CPCH04L43/0852
Inventor 刘晓莉刘文煜朱家贤邓长虹
Owner WUHAN UNIV