A Protection Scheme Containing dg for Distribution Network
A distribution network and current technology, applied in the direction of emergency protection circuit devices, electrical components, etc., can solve problems such as misoperation, refusal to operate, exit operation, etc., and achieve reliable and accurate positioning and removal, and accurate and reliable fault location.
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[0034] The technical solution of the invention will be described in detail below in conjunction with the embodiments and with reference to the accompanying drawings.
[0035] For more generality, in such as figure 1 In the shown distribution network with DG, there is 1 DG access on feeder 1, 2 DG access on feeder 2, and no DG access on feeder 3. In addition, circuit breakers, protection 10, protection 11 and protection 12 are arranged at the end of line BC, line AF and line FG in the upstream area of DG near DG, so that the fault can be cut off from both ends of the line.
[0036] 1. Fault location method based on overcurrent protection action information
[0037] In the three-stage current protection, the starting current of the current stage III, that is, the overcurrent protection, is set according to the maximum load current that may appear on the line where the protection is avoided. In the three-stage current protection, the setting value of the overcurrent protectio...
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