论文标题
电力系统计划中区域频率稳定的条件 - 第二部分：应用于单位承诺
Conditions for Regional Frequency Stability in Power System Scheduling -- Part II: Application to Unit Commitment
论文作者
论文摘要
在本文的第一部分中，我们引入了封闭形式的条件，以确保电源系统中的区域频率稳定性。在这里，我们提出了一种以线性约束形式表示这些条件的方法，并通过在生成式安排模型中实现它们来证明它们的适用性。该模型同时优化了通过解决频率固定的随机单位承诺（SUC）来优化能量生产和辅助服务，以保持频率稳定性（SUC）。我们认为大不列颠制度的特征是两个区域，这些地区造成了惯性的非均匀分布：南部的英格兰，大部分负载所在的地方，北部苏格兰，其中包含大量风资源。通过几个案例研究，可以证明惯性和频率反应不能被视为在频率上表现出区域间振荡的动力系统中全系统范围的幅度，因为它们在特定区域的位置是确保稳定性的关键。此外，在低渗透区域中抵抗中型损失被证明会导致大量降低，这可以通过加强的传输走廊来缓解。在这种情况下，提出的约束允许在每个区域中找到辅助服务的最佳体积。
In Part I of this paper we have introduced the closed-form conditions for guaranteeing regional frequency stability in a power system. Here we propose a methodology to represent these conditions in the form of linear constraints and demonstrate their applicability by implementing them in a generation-scheduling model. This model simultaneously optimises energy production and ancillary services for maintaining frequency stability in the event of a generation outage, by solving a frequency-secured Stochastic Unit Commitment (SUC). We consider the Great Britain system, characterised by two regions that create a non-uniform distribution of inertia: England in the South, where most of the load is located, and Scotland in the North, containing significant wind resources. Through several case studies, it is shown that inertia and frequency response cannot be considered as system-wide magnitudes in power systems that exhibit inter-area oscillations in frequency, as their location in a particular region is key to guarantee stability. In addition, securing against a medium-sized loss in the low-inertia region proves to cause significant wind curtailment, which could be alleviated through reinforced transmission corridors. In this context, the proposed constraints allow to find the optimal volume of ancillary services to be procured in each region.
