Automatic isolating and self-healing method for automation faults of distribution network

Abstract

An embodiment of the invention discloses an automatic isolating and self-healing method for automation faults of a distribution network. By the automatic isolating and self-healing method for automation faults of the distribution network, the technical problems that although an automation measurement and control terminal (DTU) of the distribution network is applied to a ring network power supply circuit, automatic isolation and self-healing of the faults need to be implemented by communication and a master station, communication of most of ring network points either is difficult to implement, or is unreliable, a power distribution network frame is complicated in structure and is changed frequently, the difficulty of automatic isolation and self-healing of the faults by the master station is quite high, a feeder automation terminal (FTU) is applied to the ring network power supply circuit, automatic isolation and self-healing of the faults only can be realized by secondary reclosure matching between the feeder automation terminal and a transformer substation, outlet protection of most of transformers does not have a secondary reclosure function, the fault isolation time is long, secondary power failure of users is required, and influences to users of a non-fault section is high are solved.

Description

technical field [0001] The invention relates to the field of ring network power supply, in particular to a method for automatic fault isolation and self-healing of distribution network automation. Background technique [0002] Distribution network automation terminal equipment is widely used in the market, including feeder automation terminal (FTU), distribution network automation measurement and control terminal (DTU), boundary switch controller, microcomputer relay protection device, cable fault indicator and other equipment. The rapid isolation of distribution network faults, the prevention of accident expansion, the improvement of power supply reliability, and the safe and stable operation of the power grid have played a key role. [0003] The boundary switch controller and the microcomputer relay protection device can only be applied to the branch line to realize automatic fault removal or isolation, and cannot be applied to the ring network power supply line. Although...

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Problems solved by technology

[0004] The embodiment of the present invention provides a method for automatic fault isolation and self-healing of distribution network automation, which solves the problem that although the distribution network automation measurement and control terminal (DTU) is applied to the power supply line of the ring network, it must rely on communication and the master station to realize automatic fault isolation And self-healing, but often the communication of many ring network points is either difficult to realize or unreliable. In addition, because the structure of the distribution network structure is relatively complex and changes frequently, it is very difficult to use the master station to realize automatic fault isolation and self-healing. Feeder automation The terminal (FTU) is applied to the power supply line of the ring network, which can realize the automatic isolation and self-healing of the fault, but it must cooperate with the secondary reclosing of the substation to realize it, and the outlet protection of many substations does not have the secondary reclosing function, and the fault The isolation time is long, the user needs a second power outage, and the technical problem that has a greater impact on the users in the non-faulty section

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