基于IEC61850技术的智能变电站二次回路安全隔离措施研究

发布时间：2019-02-18 20:19

【摘要】：随着智能变电站的大规模建设及新技术的应用,现场运检人员对智能变电站新技术的掌握应用还有待提高,对基于IEC61850标准下的GOOSE二次回路原理掌握不足。现阶段智能变电站内改扩建工程众多,同时部分早期智能变电站也因设备质量、运行年限、设计质量等原因在逐步进行改造,在运行变电站进行改扩建及改造工程,应确保运行设备与检修设备的良好隔离,而近年来频繁出现现场工作中因运检人员操作不当引起的保护误动、拒动事故,种种教训,引起我们的深思,也促使对智能变电站二次回路隔离技术措施进行深入研究。本文以江西电网500k V马回岭变电站全站105套合并单元、智能终端的更换改造工程为实例,提出二次回路隔离需求。为更好的理解智能变电站的GOOSE回路相关原理,首先提出了IEC61850的数据信息模型,剖析了GOOSE回路传输机制、GOOSE报文含义、GOOSE虚端子、GOOSE发送软压板等数据模型及原理,在此基础上分析了不同GOOSE回路隔离技术措施优缺点,并对SV采样回路的2种隔离措施也进行了归纳,得出了智能变电站二次设备投退原则以及注意事项。最后在500k V马回岭变电站改造实例中,提出了一种智能变电站隔离措施选择的思路,结合之前得出的投退原则结论,明确了具体的安全措施内容,同时通过一系列保障措施,确保了工程顺利实施。本文章的研究成果具有很好的典范作用,为今后各类智能变电站改造工程提供了理论指导及技术基础。
[Abstract]:With the large-scale construction of intelligent substation and the application of new technology, the application of new technology in intelligent substation still needs to be improved, and the principle of GOOSE secondary circuit based on IEC61850 standard is not well grasped. At the present stage, there are a lot of intelligent substation reconstruction and extension projects. At the same time, some of the early intelligent substations are undergoing gradual transformation because of the equipment quality, operation life, design quality, etc., and the reconstruction and extension projects are being carried out in the operation substations. It is necessary to ensure a good separation between the operation equipment and the maintenance equipment, and in recent years, there have been frequent accidents of protection misoperation, refusal accidents and various lessons caused by improper operation of the operation and inspection personnel in the field work, which has caused us to ponder deeply. It also promotes the deep research on the secondary circuit isolation technology of intelligent substation. Taking 105 sets of combined units and the replacement of intelligent terminals in the whole station of 500kV Mahui Ling Substation of Jiangxi Power Grid as an example, the requirement of secondary circuit isolation is put forward in this paper. In order to better understand the related principle of GOOSE loop in intelligent substation, the data information model of IEC61850 is put forward, and the data model and principle of GOOSE loop transmission mechanism, GOOSE message meaning, GOOSE virtual terminal, GOOSE sending soft voltage board and so on are analyzed. On this basis, the advantages and disadvantages of different GOOSE circuit isolation techniques are analyzed, and the two isolation measures of SV sampling circuit are also summarized, and the principle of secondary equipment in intelligent substation and the matters needing attention are obtained. Finally, in the example of the transformation of 500kV Mahualing substation, the paper puts forward a way of choosing the isolation measures of intelligent substation. Combined with the conclusion of the principle of switching and retreating before, it clarifies the contents of specific safety measures, and at the same time, through a series of safeguard measures, To ensure the smooth implementation of the project. The research results of this paper have a good exemplary role and provide theoretical guidance and technical basis for all kinds of intelligent substation reconstruction projects in the future.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM63;TM76

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