A Method of Checking Multiple Sets of Fixed Values ​​Online

Abstract

The invention discloses a method for on-line verification of multiple sets of setting values. The method comprises the following steps: (1) calculating setting values under a change mode by adopting a setting calculation method; (2) setting the number of circuit breakers equipped with protectors as m, so that the number of the protectors is 2m; (3) setting that each set of protector is provided with four setting value areas; (4) calculating the starting value deviation degree, the sensitivity deviation degree and the load avoiding capacity deviation degree in distance protection zone III of fixed values and calculated values of each setting value area of the devices; (5) calculating the selectivity deviation degree of the setting values and the calculated values of the setting value areas of the devices and the optimal combination of branch setting value areas matched with the devices; (6) if the number of the setting value areas is smaller than 4, returning to the step (4), otherwise, executing the step (7); (7) calculating the corresponding variance indexes of the devices; (8) selecting the corresponding setting value areas of the devices under a real time mode; (9) if the number of the devices is smaller than 2m, returning to the step (4), otherwise executing the step (10); (10) finishing the verification.

Description

technical field [0001] The invention belongs to the technical field of power grid operation, and in particular relates to a method for checking multiple sets of fixed values ​​online. Background technique [0002] With the development of the power grid, a large number of infrastructure and renovation projects have been put into production, and the temporary methods have become more and more complicated, and the challenges faced by the power grid operation have continued to increase. As the first line of defense of the power grid, relay protection plays a vital role in the safe operation of the power grid. Therefore, it is required that the power grid dispatching should continuously strengthen the ability to control the power grid in real time, especially the ability to control the action behavior of relay protection. The problems exposed by many blackout accidents in foreign countries fully illustrate the importance of dispatchers to grasp the action behavior of relay prote...

AI Technical Summary

Problems solved by technology

[0005] The existing online calibration system only checks the fixed value of a fixed value area. Due to the need for manual calculation, the reliability and safety of the grid power supply are poor

Images