Station territory and wide territory integrated protection structure mode system and method thereof

Abstract

The invention belongs to the field of electric power systems, and particularly relates to a station territory and wide territory integrated protection structure mode system and a method thereof. The system is characterized in that an interval protection module, a station territory protection module and a wide territory protection module are included; the interval protection module achieves the production function of intervals on the basis of the protection intervals of all transformer substations, extracts protection action information or electrical capacity information and uploads the protection action information or electrical capacity information to the station territory protection module; the station territory protection module centralizes information of all the stations on the basis of the interval protection module to achieve the protection function of all the transformer substations and uploads the protection action information to the wide territory protection module; the wide territory protection module achieves the wide territory protection function in a distributed mode according to interstation interactive information and the protection action information uploaded by the local station territory protection module. According to the system, a longitudinal hierarchical relay protection frame system is achieved, and the purpose of improving the relay protection performance is achieved through mutual connection of time and synergistic cooperation of the action information.

Description

technical field [0001] The invention belongs to the field of electric power systems, and in particular relates to a system and a method for constituting a station-area and wide-area integrated protection mode. technical background [0002] Relay protection is an essential part to maintain the safe and stable operation of power system. The basic task of relay protection is to identify faults and quickly remove faults to ensure that non-faulty areas can continue to operate normally. Good performance relay protection should meet the requirements of reliability, selectivity, quick action and sensitivity. [0003] In the complex modern power grid, the principles of current protection, direction protection and distance protection have been difficult to meet the requirements of the four characteristics of protection, and the disadvantages of traditional protection have become more and more obvious: due to the constraints of computer protection hardware resources, CPU processing ca...

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Problems solved by technology

[0004] (1) The protection device only obtains the information of this interval, and cannot take into account the sensitivity and selectivity. It can only adopt the principle of step-by-step coordination. The backup protection action time may be as high as several seconds, which is not conducive to the stable operation of the power grid. The selective acquisition is at the expense of fast at the expense of sex

[0005] (2) The access of large-scale new energy power will cause frequent network reconfiguration, and the protection device based on the preset setting value will face the problem of frequently modifying the protection setting value

[0006] (3) It is difficult to set the fixed value, the protection configuration is complicated, and some protections are greatly affected by the system operation mode, and the protection range changes significantly under different operation modes, and may even lose the protection range, resulting in the failure of the protection

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