Electric power system protection strategy constant value issuing method and system

Abstract

The invention discloses an electric power system protection strategy constant value issuing method. The method comprises the following steps: 1) acquiring operation mode data (element on-off and section power), a direct current control mode, a pressing plate on-off state and actual measurement information of a controllable quantity from a system protection device in real time by a scheduling end;2) splicing related information in the actual measurement information obtained by the scheduling end into a real-time operation mode word, and performing constant value online setting calculation according to the actual measurement data uploaded by the power grid model and the device to obtain an online constant value with the operation mode word; 3) checking the online constant value based on thereal-time operation mode data and the ultra-short-term prediction data of the power grid, if the check is passed, submitting the online constant value to a constant value issuing module, and otherwise, returning to the step 2); and 4) making the online constant value issuing module and the plant station end take effect after interactive confirmation. According to the invention, reliable issuing of the system protection online strategy constant value is realized through triple confirmation of comparison of operation mode words, checking of the online constant value and an online constant valueissuing process.

Description

technical field [0001] The invention belongs to the technical field of electric power systems and automation thereof, and in particular relates to a method and system for confirming value determination of electric power system protection strategies. Background technique [0002] The system protection device involves many strategic settings. For the receiving end power grid system protection, it includes such as raising the action threshold power of DC and pumped-storage cut-off pumps, boosting the action threshold power of DC and pumped-storage cut-off pumps, cutting the interruptible load action threshold power, The strategic settings such as interruptible load action, undercut power, etc., such settings on the device are generally written into the device before the system leaves the factory or trial operation, and are manually modified according to the operation needs in actual operation. In order to ensure the stable operation of the power grid, the policy setting value s...

AI Technical Summary

Problems solved by technology

In order to ensure the stable operation of the power grid, the policy setting value set in the system protection strategy usually considers to retain a large margin. However, in some special operating scenarios, due to the mismatch between the power grid operation mode and the offline typical mode, there are system protection actions that still cannot To ensure the risk of safe and stable operation, it is necessary to adjust the system protection setting value online based on the power grid operating conditions and the online strategy of system protection

In order to realize the timely and reliable effect of online setting on the system protection device, it is necessary to study a method for automatically and reliably sending the online strategy setting of the system protection. Insufficient consideration is given to the correlation of operating conditions, and all verification work is carried out at the plant station

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