A three-level protection setting calculation method for distribution network based on simulink simulation

Abstract

The present invention provides a three-level protection setting calculation method for distribution network based on Simulink simulation. By establishing a distribution network "outlet + branch + boundary" three-level relay protection coordination model, the principle of each level switch setting calculation is clarified. Use the Matlab callback function to let the user input the switch parameters, and realize the calculation of the called value, create a simulation model to generate the topology diagram of the distribution network, and judge the coordination between the protection setting of the switch and the protection setting of the upper and lower switches and the occurrence of faults When the switch protection action, choose to return to modify the switch setting calculation principle or generate the corresponding calculation draft and value list to send to the maintenance work area. The invention gets rid of manual calculation, avoids the reduction of efficiency and accuracy, facilitates technical personnel to check the correctness of calculation, and is beneficial to subsequent analysis and data storage.

Description

technical field [0001] The invention relates to the technical field of relay protection setting calculation of power system distribution network, in particular to a three-level protection setting calculation method of distribution network based on Simulink simulation. Background technique [0002] Distribution network failure is an important factor causing power outage. In recent years, with the construction of the distribution network, the structure of the distribution network has undergone tremendous changes. The original setting calculation principles of the distribution network have not adapted to this change, and situations such as refusal to operate, misoperation, and leapfrog operations have occurred from time to time. . In addition, the rapid increase in the number of distribution network equipment and the frequent changes in parameters caused by the transformation of distribution lines often lead to a huge workload in the calculation and review of distribution netw...

AI Technical Summary

Problems solved by technology

In recent years, with the construction of the distribution network, the structure of the distribution network has undergone tremendous changes. The original setting calculation principles of the distribution network have not adapted to this change, and situations such as refusal to operate, misoperation, and leapfrog operations have occurred from time to time.

In addition, the rapid increase in the number of distribution network equipment and the frequent changes in parameters caused by the transformation of distribution lines often lead to a huge workload in the calculation and review of relay protection settings in the distribution network.

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