Method of fault isolation and self-healing for electric distribution network

A distribution network fault and fault self-healing technology, which is applied in the field of distribution network, can solve problems such as low reliability, passive terminal fault detection criteria to be improved, and long recovery time of non-faulty sections, so as to meet rapid Effect
CN102447246AInactive Publication Date: 2012-05-09SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
SHANGHAI MUNICIPAL ELECTRIC POWER CO
Publication Date
2012-05-09
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention relates to a method of fault isolation and self-healing for an electric distribution network. The method comprises the following steps: 1) non-path protection which is capable of detecting and removing any position and does not need path relation is adopted on the electric distribution network; 2) a circuit breaker capable of cutting off short circuit electricity is adopted to replace the existing load switch; and 3) a spare power supply automatic input unit is arranged on the electric network. Compared with the prior art, the method provided by the invention does not only rely on a communication channel, can be used for removing a fault section selectively and rapidly, but also the power supply at a non-fault section can be recovered rapidly, and the power distribution network has a fault self-healing capability.
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Description

technical field

[0001] The invention relates to a distribution network, in particular to a method for fault isolation and fault self-healing of a distribution network. Background technique

[0002] The traditional three-stage current protection and distance protection, due to the short feeder, are often difficult to achieve coordination performance; the closer the directional overcurrent protection is to the power supply end, the longer the action time is, and when the number of feeder sections increases, the action time is also unacceptable to users; However, the differential protection that performs well in the high-voltage power grid encounters difficulties on the feeder line, because the feeder line has many branch lines, and the branch currents of these branch lines are uncertain and changeable, and it also needs channels; the direction comparison type longitudinal connection Protection has a similar problem. The non-communication protection that has appeared is based ...

Claims

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