An island detection method for distribution network based on wide-area information
A technology of island detection and wide-area information, applied in the field of power systems, can solve problems such as insufficient sensitivity and strong interference effects, and achieve the effect of strong engineering application value
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[0019] The present invention proposes a distribution network island detection method based on wide-area information, and the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0020] The detection principle of the present invention: for DG, when the distributed power supply side load changes the same, the frequency change value caused by the parallel operation of the power grid and the islanding effect is different. During grid-connected operation, the frequency adjustment ability is strong, and the corresponding frequency change is small, and the frequency of the subsystem is the same as the grid frequency; when the island effect occurs, the frequency adjustment ability of subsystem 1 is weak, and the corresponding frequency change is relatively large, while At this time, the grid frequency basically does not change. By comparing T=Δf 1 / ΔP L1 -Δf S / ΔP S with the set T 0 size to determine whether islands ...
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