Self-healing control method of power distribution network

Abstract

The invention discloses a self-healing control system and method of a city power distribution network. The system comprises a preposed host processor and a monitoring host processor which are connected through a communication module; a current signal collection module, a voltage signal collection module, a node signal collection module and a switch-off and switch-on signal output module are respectively connected with the preposed host processor; a fault line selection module, a fault statistic analysis module, a switch-off and switch-on control module, a storage module and an input and output module are respectively connected with the monitoring host processor. According to the self-healing system and control method of the invention, non-planed power cut time resulted from artificial switch-off can be effectively reduced; the power cut time of every non-fault line is controlled within second level; safe operation of the power system is ensured; the power supply reliability of the power distribution network is improved; the economic loss resulted from power cut is reduced; the power distribution network always shifts to a healthier state; the power supply safety, reliability, good quality and economy of the power distribution network are improved; and the emergency capacity is enhanced.

Description

technical field [0001] The invention belongs to the technical field of power grid protection, and in particular relates to a distribution network self-healing control method. Background technique [0002] The distribution network is the intermediate link between the power load and the large power grid. In my country, the typical voltage level is 10 / 6 / 20KV. The improvement of social production and living standards requires the distribution network to have higher power supply security and reliability. In the distribution network, there are many branches and cascaded switches, flexible operation mode, neutral point is not directly grounded, multi-point access of small-capacity distributed power generation in various energy situations, load and distributed power output have strong uncertainty , three-phase unbalance, high failure rate, and low coverage of measurement points, these characteristics make the control of distribution network very difficult, and its control level is f...

AI Technical Summary

Problems solved by technology

Under normal circumstances, the operating state of the distribution network is optimized, but due to the static network reconstruction based on the data of a time section, the change trend of the load and distributed power output is not considered, the optimization effect cannot be obtained, and the distribution network has not been fully utilized. The role of power supply / microgrid / energy storage device

In the current distribution network control, there is a lack of early warning monitoring, analysis and control of the process from insulation defects to single-phase ground faults and the development of phase-to-phase short circuits.

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