Power distribution network frame topology weak point identification method and system
An identification method and technology of distribution network, applied in electrical components, circuit devices, AC network circuits, etc., can solve real-time simulation calculation and modeling reduction method practicability and identification efficiency, lack of direct consideration of grid topology, data The structure is not easy to analyze and deal with problems such as easy analysis and identification of the weak problems of the grid, the vulnerability analysis is direct and intuitive, and the timeliness requirements are low.
Pending Publication Date: 2021-06-15
SHANGHAI JIAO TONG UNIV +1
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[0003] In view of the fact that most of the existing grid analysis methods are combined with simulation and power flow calculation, the present invention reflects the structural characteristics of the distribution network from the side to judge the reliability of the grid power supply, lacks consideration of the directness of the grid topology, and simultaneously simulates The need for calculation and modeling also reduces the practicability of the method and the lack of identification efficiency. At present, the CIM (Common Information Model) that describes the topological information of the distribution network has a large amount of data, complicated information, and the data structure is not easy to analyze and process. To address technical issues, a method and system for identifying weak points in distribution network topology is proposed. Based on the CIM model of distribution network, the CIM data is complex and difficult to use, and the CIM model data is reconstructed, topology information is extracted, and Analyze the weak points of the grid structure, and diagnose and identify the weakness of the grid structure through the analytic hierarchy process
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[0023] Such as figure 1 所示,为本实施例涉及一种配电网网架拓扑薄弱点辨识方法,首先基于配电网 CIM模型数据进行解析并提取得到拓扑数据,再对拓扑数据进行网架拓扑薄弱性分析以构建多 维度网架可靠性辨识体系,最后基于层次分析法形成多维度的融合,对网架可靠性进行综合分 析,得到网架拓扑薄弱点信息。
[0024] 所述的解析是指:在使用基于CIM模型解析数据对网架问题进行辨识与判别之前,建立 简化数据结构模型,具体为:基于“父子节点”关系的数据拓扑结构,并且以“设备”为关键词, 整合数据,形成新的简化的数据结构。在基于“父子节点”关系的数据拓扑结构中,所有设备的 拓扑关系仅需要一个数据值就可以完整的记录原结构的拓扑关系,相比于原CIM模型的 “Terminal—Connectivitynode”的多层次拓扑关系,可以有效的缩小数据规模,并且提高在提取 拓扑结构数据过程中的运算效率。
[0025] 所述的解析,具体步骤包括:
[0026] 步骤1:CIM数据分类与简化合并
[0027] CIM数据中包含二十多种不同的设备类型,例如“AC Line Segment”、“Disconnector”等, 分别对应着实际线路中的“交流线路”、“隔离开关”等设备,这些类别的数据都是存在物理空间 实际设备对应的,也是在进行拓扑解析时需要保留的数据内容。这些设备会与0-2个Terminal 相连,每个terminal会与有且仅有一个的Connectivitynode连接,以此形成了最终的拓扑结构。 由于在拓扑描述上,CIM原始数据中存在大量冗余信息,例如pole site与1个Terminal节点 相连,而pole则与0个terminal相连,但其所包含数据与pole site一样,都是描述同一个设 备的两种数据类型,故在处理时需要将其合并。
[0028] 所述的数据类型包括:
[0029] 1)描述性列表:如“circuit”,“base voltage”等,该类型数据所包含的信息为一个全局描 述性列表,与实际线路中的设备或者拓扑结构无关,但其所包含的内容是在一些网架问题中需 要使用的。
[0030] 2)非拓扑链接设备:如“pole”,“substation”等数据类型,该类型数据所包含的设备并未 连入整个拓...
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The invention discloses a power distribution network frame topology weak point identification method and system, and the method comprises the steps: carrying out the analysis and extraction of a CIM model through employing the CIM model and machine account data, obtaining topological data, recognizing the weakness problem of a frame based on the simplified topological data, carrying out the comprehensive analysis of the weakness of the frame through employing an analytic hierarchy process, and constructing a multi-dimensional grid reliability identification system to obtain grid topology weak point information. Based on a power distribution network CIM model, aiming at the problem that CIM data is complicated and not easy to use, the method reconstructs the CIM model data, extracts topological information, analyzes weak points of a power distribution network frame, and diagnoses and identifies the weakness of the frame through an analytic hierarchy process.
Description
technical field [0001] 本发明涉及的是一种智能电网优化领域的技术,具体是一种配电网网架拓扑薄弱点辨识 方法与系统。 Background technique [0002] 目前,配电网结构复杂、设备数量大,运行方式多变,无法直接利用传统大电网网架 可靠性准则评估配电网网架拓扑。传统的配电网网架可靠性与供电能力评估方法主要有两类: 一类是通过分析配电网中变电站的负荷情况,配电网系统以及用户的用电情况来评价网络的 供电能力;另一类是直接通过最小最大倍数法分析配电网的供电能力。前者通过分析电网中 变压器负荷情况、供变电设备运行年限、线路网损、线路负载率、线路供电半径等指标来综 合评价网络的供电能力,能全面细致地反映配电网运行的各项情况。但常常会由于某些指标 设置繁杂或者某些指标的获取相对困难而影响评估的效率。后者主要通过尝试法、容载比法、 最大负荷倍数法等方法,分析整个网络的最大供电能力。这些方法都目标直观,具体明确, 但是在计算过程中没有考虑到网架拓扑结构,抑或是评价结果很大程度上受到网络现有负荷 分布状况的影响。综上,现有评价与辨识手段从运行的角度入手,通过仿真与潮流计算结合 配电网结构特性判断网架供电可靠性,对网架拓扑的考虑欠缺,同时实时仿真计算与建模的 需要也降低了方法的实用性与辨识效率。 Contents of the invention [0003] 本发明针对现有的网架分析手段大都通过仿真与潮流计算结合的方式,从侧面反映配 电网结构特性以此判断网架供电可靠性,对网架拓扑直接性的考虑欠缺,同时实时仿真计算 与建模的需要也降低了方法的实用性与辨识效率的不足,目前描述配电网拓扑信息的CIM(公 共信息模模型),数据量大、信息庞杂,存在数据结构不易于分析处理的技术问题,提出一种 配电网网架拓扑薄弱点辨识方法与系统,基于配电网CIM模型,针对CIM数据繁杂不易利用 的问题,对CIM模型数据进行重构,提取拓扑信息,并对配电网网架薄弱点进行分析,通过 层次分析法对网架薄弱性进行诊断与辨识。 [0004] The present invention is achieved through the following technical solutions: [0005] 本发明涉及一种配电网网架拓扑薄弱点辨识...
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IPC IPC(8): G06F30/20G06F30/18H02J3/00G06F113/04G06F119/02
CPCG06F30/20G06F30/18H02J3/00G06F2113/04G06F2119/02H02J2203/20
Inventor 黄文焘孙志豪宋海涛骆一扬栾乐崔屹平徐硕
Owner SHANGHAI JIAO TONG UNIV