电网运行风险评估与事故预警的研究与系统开发

发布时间：2018-04-17 20:43

本文选题：安全评估 + 事故预警　；参考：《华北电力大学》2015年硕士论文

【摘要】：加强电网监控的智能化水平,可以有效预防大面积停电事故的发生,这是当前“坚强的智能电网”建设的重要任务之一。本文以河北南部电网为对象,研究系统的在线安全评估方法,并对可能发生的线路热稳定问题给出有针对性的预防控制措施,开发电力系统运行风险的评估和早期预警系统,系统的应用将有助于加强电网运行的监控,进而预防和避免大停电事故的发生。针对大型互联电网的在线检修评估问题,在对电力系统各个元件实时运行状态的统计分析基础之上,研究了在线检修方式下系统运行风险的评估方法。基于功率输送关系分析,综合考虑系统拓扑结构和运行状态,提出了功率介数指标用于辨识系统的关键线路和关键节点。通过对河北南网实时运行数据的统计分析,确定了河北南网安全监控的关键线路、节点,并给出了在线检修方式下的统计分析结果。针对系统运行中的线路热稳定问题,提出一种基于灵敏度分析的预防控制优化方法。该方法兼顾了电网的局部热稳定问题和全局的运行水平,根据灵敏度分析、潮流熵和节点自身功率水平等提出节点功率调整综合指标,进而确定功率调整节点集和功率平衡节点集,通过对节点功率进行多轮次调整,有效消除了线路热稳定问题。该方法通过河北南网中的实际应用结果验证了其的有效性。研究开发了河北南网运行风险评估与事故预警系统。分析了系统的总体需求并设计了系统架构,介绍了系统实现的过程、数据流程以及各模块的功能,并详细阐述了整个系统的开发和部署。所开发的电网运行风险评估与事故预警系统可从D5000系统获取数据,并利用在线潮流计算结果,统计分析系统各种运行指标,从电网稳态运行的角度,实现了河北南网在线的运行风险评估与事故预警。
[Abstract]:Strengthening the intelligent level of power grid monitoring can effectively prevent the occurrence of large-scale power outages, which is an important Ren Wuzhi in the construction of "strong smart grid" at present.In this paper, taking the southern Hebei power grid as the object, the online security assessment method of the system is studied, and the preventive and control measures for the possible thermal stability of the transmission line are given, and the operational risk assessment and early warning system of the power system are developed.The application of the system will help to strengthen the monitoring of power grid operation, and then prevent and avoid the occurrence of power outages.Based on the statistical analysis of the real-time operation state of each component in power system, the evaluation method of system operation risk in on-line maintenance mode is studied, aiming at the problem of on-line maintenance evaluation of large-scale interconnected power network.Based on the analysis of power transmission relationship and considering the topology and operation state of the system, the power medium index is proposed to identify the key circuits and nodes of the system.Based on the statistical analysis of the real-time operation data of Hebei South Network, the key lines and nodes of Hebei South Network Security Monitoring are determined, and the results of statistical analysis under the online maintenance mode are given.Aiming at the thermal stability of the system, an optimization method of preventive control based on sensitivity analysis is proposed.This method takes into account the problem of local thermal stability and the overall operation level of the power network. According to the sensitivity analysis, the power flow entropy and the power level of the nodes themselves, a comprehensive index of node power adjustment is proposed.Furthermore, the power adjustment node set and the power balance node set are determined, and the thermal stability problem of the transmission line is effectively eliminated by adjusting the node power in multiple rounds.The effectiveness of this method is verified by the practical application results in Hebei South Network.The operational risk assessment and accident warning system of Hebei Southern Network are studied and developed.The overall requirement of the system is analyzed and the architecture of the system is designed. The process of the system implementation, the data flow and the functions of each module are introduced, and the development and deployment of the whole system are described in detail.The system can obtain data from D5000 system, and make use of on-line power flow calculation results, statistics and analysis of various operating indicators of the system, from the point of view of the steady operation of the power network, the system can obtain data from D5000 system.The operation risk assessment and accident warning of Hebei South Network are realized.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM732

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