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arXiv 2404.03355math.OC
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基于非凸OPF的不平衡配电网鲁棒动态运行包络计算

Computation of Robust Dynamic Operating Envelopes Based on Non-convex OPF for Unbalanced Distribution Networks

Bin Liu, Julio H. Braslavsky

AI总结:

针对不平衡配电网中鲁棒动态运行包络计算复杂度高及线性化模型误差风险,提出基于非凸UTOPF的灵敏度过滤技术简化数值计算,并在澳大利亚配电网验证了其准确性与效率。

摘要:

鲁棒动态运行包络(RDOEs)解决了在不平衡配电网中,将潜在网络容量安全分配给灵活分布式能源(DER)的问题。由于RDOEs的计算复杂度远高于忽略网络参数和DER容量利用不确定性的动态运行包络(DOEs),现有的RDOE计算方法依赖于线性化的不平衡三相最优潮流(UTOPF)模型来近似枚举网络可行域。然而,使用线性化模型可能会因近似固有的误差,导致生成的RDOEs破坏网络完整性。本信提出了一种实用的灵敏度过滤技术,以简化基于非凸UTOPF公式的RDOE数值计算。通过在代表性的澳大利亚配电网进行测试,在各种公平性指标下的RDOE分配中验证了所提方法的准确性和效率。

英文摘要:

Robust dynamic operating envelopes (RDOEs) solve the problem of secure allocation of latent network capacity to flexible distributed energy resources (DER) in unbalanced distribution networks. As the computational complexity of RDOEs is much higher than that of dynamic operating envelopes (DOEs), which disregard uncertainties in network parameters and DER capacity utilisation, existing approaches to computing RDOEs have relied on linearised unbalanced three-phase optimal power flow (UTOPF) models to numerate the network feasible region approximately. The use of linearised models, however, risks producing RDOEs that undermine network integrity due to inherent errors in the approximation. This letter presents a practical sensitivity-filtering technique to simplify RDOE numerical computation based on non-convex UTOPF formulations. The accuracy and efficiency of the proposed approach are demonstrated on RDOE allocation with various fairness metrics by testing on representative Australian distribution networks.

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