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首页> 外文期刊>Smart Grid, IEEE Transactions on >Distribution Network Verification for Secure Restoration by Enumerating All Critical Failures
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Distribution Network Verification for Secure Restoration by Enumerating All Critical Failures

机译：通过枚举所有严重故障来验证配电网络的安全恢复

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摘要

If several feeders are interrupted in a severe accident, distribution networks should be restored by reconfiguring switches automatically with smart grid technologies. Although there have been several restoration algorithms developed to find the new network configuration, they might fail to restore the whole network if the network were critically damaged. The network’s design has to guarantee that it is restorable under any possible failure for secure power delivery, but it is a computationally hard task to examine all possible failures in a large-scale network with complex electrical constraints. This paper proposes a novel method to find all the critical (unrestorable) line cuts with great efficiency to verify the network design. The proposed method first runs a fast screening algorithm based on hitting set enumeration; the algorithm selects suspicious cuts without naively examining all possible cuts. Next, unrestorable cuts are identified from the suspicious ones with another algorithm, which strictly tests the restorability of the network under each suspicious cut without redundantly repeating heavy power flow calculations. Thorough experiments on two distribution networks reveal that the proposed method can find thousands of unrestorable cuts from the trillions of possible cuts in a large 432-Bus network with no significant false negatives.
机译：如果多个馈线在严重事故中中断，则应通过使用智能电网技术自动重新配置交换机来恢复配电网络。尽管已经开发了多种恢复算法来查找新的网络配置，但是如果网络受到严重破坏，它们可能无法恢复整个网络。网络的设计必须保证在任何可能的故障下都可以恢复以确保安全的电力传输，但是要检查具有复杂电气约束的大型网络中的所有可能的故障，这是一项计算困难的任务。本文提出了一种新颖的方法来高效地查找所有关键（不可恢复）线切割，以验证网络设计。该方法首先运行一种基于命中集枚举的快速筛选算法。该算法会选择可疑切割，而不会天真地检查所有可能的切割。接下来，使用另一种算法从可疑切割中识别出不可修复的切割，该算法严格测试每个可疑切割下的网络的可恢复性，而无需重复重复繁琐的潮流计算。在两个配电网络上进行的彻底实验表明，该方法可以在大型432总线网络中从数千亿个可能的削减中找到数千个不可恢复的削减，而没有明显的假阴性。

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