Optimal Portfolio of Distinct Frequency Response Services in Low-Inertia Systems
Optimal Portfolio of Distinct Frequency Response Services in Low-Inertia Systems
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DOI：
10.1109/tpwrs.2020.2997194
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发表时间：
2020-11-01
影响因子：
6.6
通讯作者：
Strbac, Goran
中科院分区：
文献类型：
--
作者：
Badesa, Luis;Teng, Fei;Strbac, Goran
由于可再生能源的整合，系统惯性水平降低，增加了对具有成本效益的辅助服务的需求，如频率响应（FR）。在本文中，提出了一个封闭形式的解决方案，描述频率动态的微分方程，它允许获得频率安全的代数约束，以实现优化例程。这是在考虑任何有限数量的FR服务与区别的特点，如不同的交付时间和激活延迟。由这些频率安全约束定义的问题可以被公式化为混合二阶锥规划（MISOCP），其可以由现成的锥优化求解器有效地处理。本文还考虑到惯性贡献的不确定性，从需求侧制定的频率安全条件的机会约束，其中提供了一个精确的凸重新制定。最后，案例研究突出了这种频率安全的制定的有效性。
A reduced level of system inertia due to renewable integration increases the need for cost-effective provision of ancillary services, such as Frequency Response (FR). In this paper a closed-form solution to the differential equation describing frequency dynamics is proposed, which allows to obtain frequency-security algebraic constraints to be implemented in optimization routines. This is done while considering any finite number of FR services with distinguished characteristics, such as different delivery times and activation delays. The problem defined by these frequency-security constraints can be formulated as a Mixed-Integer Second-Order Cone Program (MISOCP), which can be efficiently handled by off-the-shelf conic optimization solvers. This paper also takes into account the uncertainty in inertia contribution from the demand side by formulating the frequency-security conditions as chance constraints, for which an exact convex reformulation is provided. Finally, case studies highlighting the effectiveness of this frequency-secured formulation are presented.