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交直流电力信息物理系统连锁故障演化模型及风险评估
张晶晶, 陈博进, 吴佳瑜, 齐先军, 杨熙
合肥工业大学 安徽省新能源利用与节能省级实验室,安徽 合肥 230009
摘要:
为了更准确地对交直流电力信息物理系统(CPPS)连锁故障进行仿真,提出考虑多时间尺度和控制措施时间特性的交直流CPPS连锁故障演化模型。首先,建立3种时间尺度过程下的模型,短时间尺度过程考虑直流换相失败引起的直流闭锁、暂态稳定判断及控制、交流线路严重过载、信息传输;长时间尺度过程考虑一般过载及其控制、重载线路跳闸;极长时间尺度过程考虑负荷波动。然后,考虑信息节点失效等因素选取初始故障集,若交流线路故障开断,判断直流线路是否换相失败引起直流闭锁;若直流线路故障闭锁,判断交流线路是否发生严重过载;若信息失效,判断线路状态信息是否上传;若应对一般过载,考虑控制措施的时间特性,制定交直流控制协调方案。最后,评估事故链风险。分别对线路开断信息上传失效、过载信息上传失效以及信息节点失效3种场景进行算例分析,并分析不同信息失效原因对事故链的影响,验证了基于多时间尺度的交直流CPPS连锁故障模型的有效性。
关键词:  交直流电力信息物理系统  连锁故障  多时间尺度  信息上传失效  风险评估
DOI:10.16081/j.epae.202202010
分类号:TM743
基金项目:安徽省自然科学基金资助项目(1808085ME142);高等学校学科创新引智计划资助项目(BP0719039)
Cascading failure evolution model and risk assessment of AC/DC CPPS
ZHANG Jingjing, CHEN Bojin, WU Jiayu, QI Xianjun, YANG Xi
Anhui Provincial Laboratory of Renewable Energy Utilization and Energy Saving, Hefei University of Technology, Hefei 230009, China
Abstract:
In order to simulate the cascading failure of AC/DC CPPS(Cyber-Physical Power System) more accurately, the cascading failure evolution model of AC/DC CPPS considering multiple time-scales and time characteristic of control measures is proposed. Firstly, the models under three time-scale processes are established. DC blocking caused by DC commutation failure, transient stability judgment and control, severe overload of AC line and information transmission are considered in the short time-scale process, general overload and its control, heavy-duty line tripping are considered in the long time-scale process, and load fluctuation is considered in the extreme long time-scale process. Secondly, the initial fault set considering the information node failure and other factors is selected. If AC line fault is breaking, it is necessary to judge whether DC line is blocked due to commutation failure. If DC line is blocking, it is necessary to judge whether AC line is severe overloaded. If the information is failure, it is necessary to judge whether the line state information is uploaded. If AC line is generally overloaded, the AC/DC control coordination schemes are formulated considering the time characteristic of control measures. Finally, the risk assessment of accident chain is performed. The case analysis is carried out under three cases of line breaking/overload information upload failure and information node failure, and the influence of different information failure reasons on the accident chain is analyzed, so that the effectiveness of the cascading failure model of AC/DC CPPS based on multiple time-scales is verified.
Key words:  AC/DC CPPS  cascading failure  multiple time-scales  information upload failure  risk assessment

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