Coordination and optimization method and system for segmental line overload protection control

Abstract

The present invention relates to a segmented line overload protection control coordination and optimization method and system, which is characterized in that it includes the following content: 1) When a line in the power system network is overloaded, strip each power generation node in the power system network to each 2) Determine the adjustable control resources in the power system network within the limit thermal stability operating time; 3) Determine the minimum range of the power of the overloaded line to restore the normal operating state Load loss and control measures; 4) When the minimum load loss is 0, control the power generation nodes and load nodes in the power system network according to the determined control measures; when the minimum load loss is not 0, according to the determined control measures The adjustable control resource is used to coordinate and optimize the overload protection device on the overload line and the adjustable control resource in the power system network. The invention can be widely used in the technical field of power grid protection and control.

Description

technical field [0001] The invention relates to a coordinated optimization method and system for segmental line overload protection control, and belongs to the technical field of power grid protection control. Background technique [0002] With the construction and development of the power system, the load demand is increasing year by year, and the interconnection degree of the power grid is continuously improving. This puts forward higher requirements for the safe and stable operation of the power system, and also brings unprecedented challenges to the protection and control of the power grid. The insufficient network transmission capacity of the power system or the fault removal of some components may cause the overload of the transmission line in the power system network, and the long-term overload of the line will cause the line to be overheated and damaged, resulting in more serious accidents. [0003] After the transmission power of the line crosses the line, the line ...

AI Technical Summary

Problems solved by technology

[0004] The existing line overload emergency protection control measures only aim to protect electrical equipment. After the line overload operation lasts for a period of time, the overload protection device of the line will directly cut off the overload line. This form of protection does not stand in the perspective of system safety. Defense will likely lead to aggravation of the failure situation and contribute to a wider range of systemic accidents

Existing active power emergency protection control measures generally consider the current thermal stability limit running time of the line, and adopt methods such as sensitivity method and penalty function optimization method to determine the machine and load shedding schemes. However, the existing line overload emergency protection control measures are different from active power emergency Protection and control measures are generally separated from each other, lacking coordination and cooperation

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