Amongst the background of the demand of modern society for renewables and decarbonisation, the gradual penetration of distributed energy resources (DER) has been observed. While many DER studies have centered on reliability and economic issues, there is a scarcity of research on the possible grid support that aggregated DER could provide to bulk electric systems (BES). In the present paper, a novel control scheme acting with optimally selected DER aggregations (DERAs) is proposed to prevent transmission cascading from overcurrent protection in transient process. The security control scheme is obtained by reshaping a transient energy function, where the energy function not only characterises the nominal dynamic behaviour of the power system transient, but also depicts transmission tripping caused by the overcurrent. On the basis of the availability and capability thereof, the participating DERAs are selected via a sparse matrix, which is solved with linear matrix inequalities (LMIs) in the form of semi-definite programming (SDP) without the linearisation of the system model. Test examples are provided with IEEE standard 14 and 118 Bus Systems.

在现代社会对可再生能源和脱碳需求的背景中，已经观察到分布式能源的逐步普及。尽管许多DER研究都集中在可靠性和经济问题上，但对于聚集的DER可以为大型电力系统（BES）提供的可能的电网支持的研究很少。在本文中，提出了一种新颖的控制方案，该方案与最优选择的DER聚合（DERAs）配合使用，以防止瞬态过程中的输电级联过流保护。通过重塑瞬态能量函数获得安全控制方案，其中该能量函数不仅表征电力系统瞬态的标称动态行为，而且还描​​述了由过电流引起的传输跳闸。基于其可用性和能力，通过稀疏矩阵选择参与的DERA，使用稀疏矩阵解决该问题，而线性不等式（LMI）将以半定编程（SDP）的形式进行求解，而无需对系统模型进行线性化。IEEE标准14和118总线系统提供了测试示例。