A method for replaying recorded wave messages of dynamic model tests

Abstract

The invention provides a dynamic simulation experiment wave-recording message playback method. The method comprises the following steps: 1) through an interpolation algorithm, converting sampling frequency of analog quantity in an original waveform file COMTRADE1 into sampling frequency required by an IED and generating a new waveform file COMTRADE2; 2) carrying out channel association; 3) calculating sampling values and generating SV frames; 4) for each SV frame, calculating ideal sending time thereof; 5) generating a GOOSE frame sequence and calculating ideal sending time of GOOSE frames; 6) calculating link occupation time of the SV frames and the GOOSE frames; 7) calculating actual sending time of the SV frames and the GOOSE frames; and 8) according to the ordered SV frames and the GOOSE frames as well as actual sending time thereof, generating a pcap file, and carrying out playback on the pcap file by utilizing a pcap file playback function of a digital relay protection tester. Dynamic simulation experiment wave-recording data is fully utilized in a waveform playback manner, so that IED simulation test can be finished without complex and huge dynamic model test environment.

Description

technical field [0001] The invention relates to a message playback method, in particular to a dynamic model test wave recording message playback method. Background technique [0002] The dynamic model test refers to the experimental research carried out on a purely physical model system (ie, a dynamic model test system) that is equivalent to the actual system established using similar principles. The dynamic model test system includes generators, transformers, transmission lines, line switches, current transformers, voltage transformers, intelligent secondary equipment and control systems, and is directly connected to the actual power system grid-connected, and the power is simulated on the established model system Various operating conditions and faults of the system, the current and voltage signals of the system are collected through current transformers, voltage transformers and MUs, which can be used to verify and evaluate the functions and performances of relay protecti...

AI Technical Summary

Problems solved by technology

[0003] However, the development of the dynamic model test is limited by the following aspects: 1) The modeling process of the dynamic model test is complicated, the cycle is long, the repeatability is poor, the component parameters are many, and the professional level and proficiency of the testers are high; 2) For Different protection devices need to establish different dynamic model test systems, which have higher requirements for test equipment and test sites; 3) With the construction and development of smart grids, the demand for detection of relay protection devices in smart substations continues to increase. There are few laboratories with dynamic model testing capabilities, and resources are scarce, which cannot meet the testing needs of protective devices

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