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Optimal Operation of DC Networks to Support Power System Outage Management

机译：DC网络的最佳运行以支持电力系统中断管理

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摘要

The penetration of dc networks for different applications in power systems is increasing. This paper presents a novel methodology for security-constrained optimal power flow (SCOPF) operation of a power system, such as a smart grid or a supergrid, with an embedded dc network. The methodology demonstrates that dc networks can be operated to provide support to ac systems, increasing its security of supply and resilience in case of outages, while reducing operational costs. Moreover, the outage management support can be achieved via a preventive SCOPF-i.e., the combined network stays N-1 secure after outages without need for further control action-or via a corrective SCOPF, by using the fast controls of the ac-dc converters to react to the contingencies. The methodology relies on the construction of a binary outage matrix and optimizes only the control variables of the ac and dc networks. It was successfully tested in system with 12 buses and in the IEEE30 network with 35 buses. Operational savings of up to 1% and 0.52% were obtained for the first and second networks, respectively, while network violations for the N-1 contingency scenarios were completely eliminated in the first and reduced by 70% in the former.
机译：直流网络在电力系统中的不同应用中的渗透正在增加。本文提出了一种用于具有嵌入式直流网络的电力系统（例如智能电网或超级电网）的安全受限的最佳潮流（SCOPF）操作的新颖方法。该方法论证明，可以运行直流网络来为交流系统提供支持，从而在发生故障的情况下提高其供电安全性和弹性，同时降低运营成本。此外，可以通过预防性SCOPF来实现停电管理支持，即，通过使用AC-DC转换器的快速控制，在停电后组合网络可以保持N-1安全，而无需采取进一步的控制措施-或通过纠正性SCOPF对突发事件做出反应。该方法依赖于二进制中断矩阵的构建，并且仅优化交流和直流网络的控制变量。它已在具有12条总线的系统和具有35条总线的IEEE30网络中成功进行了测试。第一个网络和第二个网络分别节省了高达1％和0.52％的运营成本，而在第一个网络中，针对N-1应急情况的网络违规行为被完全消除，而在前一个情况中则减少了70％。

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