Frequency-Constrained Resilient Scheduling of Microgrid: A Distributionally Robust Approach
Frequency-Constrained Resilient Scheduling of Microgrid: A Distributionally Robust Approach
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DOI：
10.1109/tsg.2021.3095363
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发表时间：
2021-06
影响因子：
9.6
通讯作者：
Zhongda Chu;Ning Zhang;Fei Teng
中科院分区：
文献类型：
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作者：
Zhongda Chu;Ning Zhang;Fei Teng
为了防止意外孤岛事件下由于高电力电子（PE）渗透率而导致潜在的频率不稳定，本文提出了一种新颖的微电网调度方法，其中包括系统频率动态以及与可再生能源和负载相关的不确定性。合成惯量（SI）控制用于调节逆变发电机（IBG）的有功功率输出，以支持孤岛后频率评估。与非关键减载相关的不确定性基于分布稳健公式进行显式建模，以确保孤岛事件期间的弹性运行。通过分析得出所产生的频率约束，并将其重新表述为二阶锥体（SOC）形式，进一步纳入微电网调度模型，从而从微电网的角度实现最佳频率服务提供。随着交流潮流约束的 SOC 放宽，整个问题被构造为混合整数 SOC 编程 (MISOCP)。基于改进的IEEE 14总线系统证明了该模型的有效性。
In order to prevent the potential frequency instability due to the high Power Electronics (PE) penetration under an unintentional islanding event, this paper presents a novel microgrid scheduling approach which includes the system frequency dynamics as well as the uncertainty associated with renewable energy resources and load. Synthetic Inertia (SI) control is applied to regulating the active power output of the Inverter-Based Generators (IBGs) to support the post-islanding frequency evaluation. The uncertainty associated with the noncritical load shedding is explicitly modeled based on the distributionally robust formulation to ensure resilient operation during islanding events. The resulted frequency constraints are derived analytically and reformulated into Second-Order Cone (SOC) form, which are further incorporated into the microgrid scheduling model, enabling optimal frequency services provision from the micorgrid perspective. With the SOC relaxation of the AC power flow constraints, the overall problem is constructed as a mixed-integer SOC Programming (MISOCP). The effectiveness of the proposed model is demonstrated based on modified IEEE 14-bus system.