有源配电网的全象限安全域

发布时间：2018-04-10 00:27

本文选题：有源配电网　切入点：全象限配电系统安全域　出处：《电力系统自动化》2017年21期

【摘要】：针对有源配电网,提出了全象限配电系统安全域(TQ-DSSR)的概念与模型,并观测归纳城市配电网TQ-DSSR的拓扑特性。首先,讨论了有源配电网的正常运行约束与N-1安全性,再进一步建立TQ-DSSR模型。其次,观测TQ-DSSR的二维截面,与传统配电系统安全域(DSSR)对比发现,最显著的区别是TQ-DSSR由单象限域变为全象限域。对于以供电功能为主的城市配电网,TQ-DSSR的形状与DSSR相同,可能呈现五边形、梯形、矩形或三角形,但斜边与坐标轴在域方向夹角不只为45°,还可能为135°;TQ-DSSR最安全点为分布式电源出力最大且负荷空载工作点,不再是传统的零负荷坐标原点;TQ-DSSR状态空间中的安全性满足广义单调减性,即当割集净负荷增加时安全性降低或不变。TQ-DSSR模型反映了有源配电网中节点与支路潮流均有反向的基本特征,为后续考虑储能、微网与负荷响应等元素的完整智能DSSR奠定了基础。
[Abstract]:For active distribution network, the concept and model of TQ-DSSRs in security domain of all-quadrant distribution system are presented, and the topological characteristics of TQ-DSSR in urban distribution network are observed and summarized.First, the normal operation constraints of active distribution network and the security of N-1 are discussed, and the TQ-DSSR model is further established.Secondly, compared with the traditional distribution system security domain, it is found that the most significant difference is that the TQ-DSSR changes from single quadrant to full quadrant.The shape of TQ-DSSR in urban distribution network is the same as that of DSSR, and it may be pentagonal, trapezoid, rectangular or triangular.However, the angle between oblique edge and coordinate axis is not only 45 掳in the domain, but also the safest point of 135 掳TQ-DSSR is the maximum output of distributed power and the no-load working point of load. It is no longer the traditional zero load coordinate origin and the security in the state space of TQ-DSSR satisfies the generalized single subtraction.That is, when the cut net load increases, the security decreases or remains the same. TQ-DSSR model reflects the basic characteristics of the node and branch power flow in the active distribution network, which lays the foundation for the further consideration of the complete intelligent DSSR of energy storage, microgrid and load response.
【作者单位】：智能电网教育部重点实验室(天津大学);
【基金】：国家重点研发计划资助项目(2016YFB0900103) 国家自然科学基金面上项目(51477112)~~
【分类号】：TM727

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