Wide-area power network hierarchical protection and control system

Abstract

The invention discloses a wide-area power network hierarchical protection and control system. The system comprises an acquisition control layer unit and a network protection layer unit which communicate with each other, wherein the acquisition control layer unit comprises an instation local data acquisition and control device, interstation remote data acquisition and control device and an instation onsite protection control device; and the network protection layer unit comprises two-layer protection of an interstation rapid differential protection device and an interstation and interstation time-delay differential protection device. The system has the following advantages: the system realizes hierarchical protection and control of a wide-area power network, enables instation protection control and wide-area protection control to form systematic cooperation, realizes rapid recovery of power supply and ensures power supply reliability.

Description

technical field [0001] The invention relates to the field of power grid protection and control, in particular to a wide-area power grid hierarchical protection and control system. Background technique [0002] With the continuous advancement of UHV AC and DC transmission projects and further expectations for the future energy Internet, the structure and operation mode of the power grid will become more flexible and changeable, and the transient process of the power grid will also become more complex. At present, the large-scale promotion and application of smart substations has promoted the sharing and optimization of data in the substation, but the protection and control system based on local information can no longer meet the reliability and safety requirements of power grid development, showing difficulty in setting calculations and slow action speed. , Mismatch is common, and even misoperation occurs, which has become a weak link in power grid security. Therefore, it is...

AI Technical Summary

Problems solved by technology

Solve the problem that the existing protection and control system cannot realize the coordinated optimization control of the whole process of the power grid

[0006] However, the above patents still use the traditional microcomputer protection system principle structure in the WAN protection principle structure, and there is interdependence between the protection action behaviors at different levels, which fails to solve the problems that may be caused by difficult setting, slow action speed, and field mismatch. moving and other issues

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