Grid-Aware versus Grid-Agnostic Distribution System Control: A Method for Certifying Engineering Constraint Satisfaction
Grid-Aware versus Grid-Agnostic Distribution System Control: A Method for Certifying Engineering Constraint Satisfaction
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网格感知与网格无关的配电系统控制：一种验证工程约束满足的方法
DOI：
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
Line A. Roald
中科院分区：
文献类型：
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作者：
D. Molzahn;Line A. Roald
分布式能源（DER）在配电系统中的日益渗透，促使控制器的设计，利用DER的能力，以实现系统范围的目标。这些控制器可以是电网不可知的，也可以是电网感知的，具体取决于是否考虑配电网络约束。网格不可知控制器具有不需要网络模型或系统测量的优点，但可能导致危险的约束违反。而不是开发一个特定的控制器，本文认为DER控制器的潜在影响与网络约束违反。具体而言，本文开发了一种基于优化的方法，严格证明任何网格不可知控制器可以应用时，没有关于网络约束违反的问题，或者，相反，当网格感知控制可能需要维护配电网的安全。所提出的方法使用凸优化技术来约束负载变化的影响，给定一个子集的总线电压测量和控制。该方法或者提供安全操作的证书，或者识别潜在的关键约束和对附加可控性的需要。数值试验表明，有能力证明安全操作的不同范围的变化。
Growing penetrations of distributed energy resources (DERs) in distribution systems have motivated the design of controllers that leverage DER capabilities to achieve system-wide objectives. These controllers may be either grid-agnostic or grid-aware, depending on whether distribution network constraints are considered. Grid-agnostic controllers have the benefit of not requiring network models or system measurements, but may cause dangerous constraint violations. Rather than develop a specific controller, this paper considers the potential impacts of DER controllers with respect to network constraint violations. Specifically, this paper develops an optimization-based method to rigorously certify when any grid-agnostic controller can be applied without concern regarding network constraint violations, or, conversely, when grid-aware control may be needed to maintain distribution grid security. The proposed method uses convex optimization techniques to bound the impacts of load variability, given a subset of buses with voltage measurements and control. The method either provides a certificate for secure operation or identifies potentially critical constraints and the need for additional controllability. Numerical tests illustrate the ability to certify secure operation for different ranges of variability.