配电开关智能控制及监测装置的研究及其应用

发布时间：2018-11-17 12:32

【摘要】：目前,由于配电网自动化实际应用较少,而现有的配电网因为不具备自愈功能,导致故障时用户停电时间较长,并且无法实现非故障区域的负荷转移;12k V真空断路器在配电网中应用广泛,但是无法及时了解断路器的健康状况,只能通过定期检修来排除故障隐患。论文通过带有保护功能和断路器在线监测功能的DTU(Distribution Terminal Unit,配电终端)的研究,解决了上述问题,做了如下主要工作:1.设计了DTU装置的整体硬件系统,重点对装置中的CPU主板模块,IO模块,TRIP模块的硬件进行设计。研究了DTU装置的保护功能,当线路中有故障发生时,快速识别故障,通过对配电开关的控制,隔离故障,恢复非故障区域的供电。研究了断路器机械特性参数和分合闸线圈电流在判断断路器是否正常运行的作用。通过对相关传感器的选择,实现了断路器机械特性参量的现场获取,通过获得的机械特性参量,绘制出断路器行程-时间曲线和分合闸线圈电流曲线,用来对断路器操作机构是否出现异常进行分析判断。2.研究了在双电源供电手拉手环网接线方式的配电网自动化方案中,不同的自愈控制方式下DTU装置的应用。针对在联络线故障,负荷开关出线方案故障和断路器出线方案故障中,DTU如何配合主站对配电开关进行控制,完成对故障区域的隔离和恢复非故障区域供电进行了分析。建立了一套具备集中式自愈功能的配电网自动化方案演示系统。3.通过实验,验证了配电网自动化方案在不同故障点对于不同故障类型的自愈过程,测得了自愈时间。通过实际工程项目获得的断路器在线监测波形,进行分析对比,判断可能的故障部位,在对断路器进行检修后,验证了故障部位判断的正确性,从而验证了DTU装置断路器在线监测功能的可行性。通过实验及实际工程项目验证了论文所设计的DTU装置的功能。
[Abstract]:At present, due to the lack of practical application of distribution network automation, the existing distribution network does not have self-healing function, which leads to the longer outage time of users and the failure to realize load transfer in non-fault areas. The 12kV vacuum circuit breaker is widely used in the distribution network, but it can not understand the health condition of the circuit breaker in time. Through the research of DTU (Distribution Terminal Unit, distribution terminal with protection function and circuit breaker on-line monitoring function, the above problems are solved, and the main work is as follows: 1. The whole hardware system of DTU device is designed, and the hardware of CPU motherboard module, IO module and TRIP module are mainly designed. The protection function of DTU device is studied. When there is a fault in the line, the fault can be quickly identified, and the power supply in the non-fault area can be restored by controlling the distribution switch and isolating the fault. The function of circuit breaker's mechanical characteristic parameter and current of closing coil to judge whether the circuit breaker is running normally or not is studied. Through the selection of related sensors, the field acquisition of circuit breaker mechanical characteristic parameters is realized. Through the obtained mechanical characteristic parameters, the circuit breaker travel time curve and closing coil current curve are drawn. Used to analyze and judge whether abnormal operation mechanism of circuit breaker. 2. In this paper, the application of DTU device under different self-healing control modes in the distribution network automation scheme of double-power supply hand-in-hand ring network connection is studied. In view of the fault of tie-line fault, load switch outlet scheme and circuit breaker outlet scheme, how to cooperate with the main station to control the distribution switch, and how to complete the isolation of the fault area and restore the power supply in the non-fault area are analyzed by DTU. A demonstration system of distribution network automation scheme with centralized self-healing function is established. Through experiments, the self-healing process of distribution network automation scheme for different fault types at different fault points is verified, and the self-healing time is measured. The on-line monitoring waveforms of circuit breakers obtained from actual engineering projects are analyzed and compared to judge the possible fault locations. After the circuit breaker is overhauled, the correctness of the fault location judgment is verified. The feasibility of on-line monitoring function of DTU circuit breaker is verified. The function of the DTU device designed in this paper is verified by experiments and practical projects.
【学位授予单位】：厦门理工学院
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM561

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