A distribution network integrated protection method that integrates line self-healing

Abstract

The present invention provides an integrated protection method for the distribution network that integrates line self-healing, including the steps: step S10, when a fault occurs in the distribution network, the fault is removed through the action of a circuit breaker, and the fault information in the distribution network is obtained in real time. The above fault information is the overcurrent information of the branches in the distribution network; step S11, based on the network-based structure matrix of the distribution network, determine the type and fault location through the operation of the corresponding matrix, and perform fault isolation; step S12, based on The reachability matrix divides the distribution network after fault isolation, and restores power supply to the passive area connected to the tie switch; step S13, reconstructing the distribution network comprehensively considering the line overload situation, load sensitivity, and load importance. By implementing the present invention, better protection and control performance with "self-healing" properties can be obtained.

Description

technical field [0001] The invention relates to the technical field of power supply network, in particular to a distribution network integrated protection method with integrated line self-healing. Background technique [0002] The existing distribution network protection methods are mainly traditional protection schemes, and different protection methods are used for different faults; the existing fault location and fault isolation technologies are relatively mature in small resistance grounding system faults, but in small current grounding systems It is not yet mature; self-healing mainly embodies and protects a fault backup self-switching system that is independent of each other. [0003] At present, secondary equipment such as distribution network protection, voltage and reactive power control, and distribution automation are arranged separately and built separately. The interoperability between various equipment is poor, and it is difficult to achieve plug and play. There...

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Problems solved by technology

[0003] At present, secondary equipment such as distribution network protection, voltage and reactive power control, and distribution automation are arranged separately and built separately. The interoperability between various equipment is poor, and it is difficult to achieve plug and play. There are repeated investments, Management and maintenance workload problems

[0004] Traditional protection is only responsible for removing faults (due to the complex changes in the operation mode of the new distribution network, it is difficult to set conventional protection), while load transfer and power supply restoration are completed by safety devices or measurement and control devices such as standby automatic switching and reclosing, which are difficult to meet more High-level "self-healing" goals

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