Power distribution network integrated protection method merging line self-recovery

Abstract

The invention provides a power distribution network integrated protection method merging line self-recovery, the method comprises the following steps: a step S10, when a power distribution network fails, removing fault through breaker operation, and obtaining fault information in the power distribution network in real time, wherein the fault information is an overcurrent information of a branch inthe power distribution network; a step S11, based on a net base structure matrix of the power distribution network, determining type and fault position through computation for corresponding matrix, and performing fault isolation; a step S12, based on an accessibility matrix, partitioning the power distribution network subjected to fault isolation, and recovering power supply of a passive region connected with an interconnection switch; a step S13, comprehensively considering line overload condition, load sensitivity and load importance degree to reconstruct the power distribution network. Byimplementing the power distribution network integrated protection method merging line self-recovery, better protective control performance with 'self-recovery' property 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] The 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 the conventional protection), while the load transfer and power supply restoration are completed by safety devices or measurement and control devices such as backup automatic switching and reclosing, which are difficult to meet more High-level "self-healing" goals

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