Self-adaptive setting method and system for power distribution network based on switch grading

Abstract

The invention provides a self-adaptive setting method and system for a power distribution network based on switch grading. The method comprises the following steps: establishing a setting principle library according to the switch grade number; marking a switch configured with a protection function; acquiring switch information in the distribution network automation system, and judging whether switch displacement exists or not according to the switch information; if the switch is shifted, mapping the switch information corresponding to the shifted switch to the network topology; analyzing a network topology by taking a 10 kV outgoing line switch as a primary switch, traversing the network topology downwards, and re-grading the switch with a protection function; based on a switch re-grading result, automatically matching a setting principle in a setting principle library; and performing constant value calculation according to a setting principle matched with the switch series to generate new constant value data. The complexity of setting the distribution network equipment can be avoided, the time level difference is saved, meanwhile, the selectivity and rapidity of protection are considered, and multi-level series power supply line protection can be ensured to be matched.

Description

technical field [0001] The invention relates to the technical field of power systems, in particular to a method and system for self-adaptive setting of a distribution network based on switch classification. Background technique [0002] With the rapid development of the distribution network, the power supply of multi-level series is increasing. If the coordination is carried out step by step according to the simple setting principle, the protection coordination time will be extended without limit, which is very unfavorable for the protection to quickly remove faults, and often has Cases where protection cannot cooperate. [0003] At present, the commonly used distribution network setting calculation method includes setting the mismatch point to achieve the purpose of shortening the protection action time, but if the mismatch point is not selected properly, it will cause the protection to malfunction when the line fails, thereby expanding the blackout area and affecting the r...

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Problems solved by technology

[0002] With the rapid development of the distribution network, the power supply of multi-level series is increasing. If the coordination is carried out step by step according to the simple setting principle, the protection coordination time will be extended without limit, which is very unfavorable for the protection to quickly remove faults, and often has Cases where protection cannot cooperate

[0003] At present, the commonly used distribution network setting calculation method includes setting the mismatch point to achieve the purpose of shortening the protection action time, but if the mismatch point is not selected properly, it will cause the protection to malfunction when the line fails, thereby expanding the blackout area and affecting the reliability of power supply

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