Self-healing control method of distribution network

Abstract

The invention discloses a self-healing control method of a distribution network, which adopts centralization coordination and the distribution coordination, has self-adaptability during signal treatment and generation of a control strategy, and can automatically complete the control process without manual intervention to coordinate actions of a relay protection device and a protection control device, actions of a switch and a smart switch and the action of a safety automatic device. The method comprises a distributed self-healing control step and a centralized self-healing control step, can determine the current operation state of the distribution network by collecting the voltage data, the current data, the on-off state and the like, and can apply an intelligent method to make a decisionso as to coordinated control the switch, the protection control device, the safety automatic device and the like, thereby enabling the distribution network to always transfer to a more healthy state,improving the safety, the reliability, the quality and the economy of the distribution network and enhancing the emergency capacity.

Description

technical field [0001] The invention relates to a control method for safe, reliable, high-quality and economical operation of a distribution network, and belongs to the cross-technical application field of power system theory, control theory and artificial intelligence. 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 cha...

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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