变电站微机防误闭锁系统应用研究

发布时间：2018-05-10 20:19

本文选题：变电站 + 倒闸操作　；参考：《华北电力大学》2014年硕士论文

【摘要】：变电站是电网的重要组成单元,担负着变换电压等级,投入、切除负荷等重要任务,变电站的可靠运行直接关系到电网的稳定性,而防止电气误操作技术又是变电站正常运行的技术保障。经济和科学技术的发展促进我国电力科学的进步,自动化的技术已经广泛地应用到变电站中,遥测、遥信、遥调和遥控这四种重要的功能也得以在变电站中实现。这能够有效地提高供电的可靠性,保证供电的质量,但是,也相应地对变电站如何使用闭锁装置来防止电气误操作提出更高的要求,闭锁要求也需要对应更新。本文首先总结了变电站防误闭锁装置的发展状况和国内外研究动态,阐述了变电站防误闭锁装置的一般要求,对比介绍几种常用的防误闭锁形式：机械闭锁,电气闭锁和电磁闭锁等的运行优缺点,并重点介绍了当前微机闭锁的主要形式分为离线式微机防误闭锁、在线式微机防误闭锁和综合式微机防误闭锁装置。简要介绍RCS9200型微机五防闭锁系统功能实现过程,分析500kV忻州变电站现场的实际应用情况,总结了实际工作中出现的电脑钥匙故障、锁具故障、防误主机及五防系统故障等主要故障的表象、分析原因,并提出各种故障的解决办法。重点介绍了五方面主要技术改进：对500kV隔离开关与接地刀闸闭锁回路做出详细分析,并提出改进方案；对“防走空程”问题提出增加“检测隔离开关机构位置”关键步骤,解决电脑钥匙“走空程”问题；通过母线独立地刀闭锁装置的应用,提高防误闭锁能力；介绍了一种变电站新型锁具防护盖,保护变电站锁具,提高锁具使用寿命；在断路器遥控闭锁控制回路中,加装遥控闭锁继电器,实现遥控操作的硬接点闭锁问题。然后对5个具体问题,提出针对性改进方案的设想,最后就防误闭锁管理方面存在问题分析并提出改进措施。最后对防误闭锁的发展方向做出下一步展望。
[Abstract]:Substation is an important component unit of power network, which takes on important tasks such as changing voltage grade, putting in, removing load and so on. The reliable operation of substation is directly related to the stability of power network. The technology of preventing electrical maloperation is the technical guarantee of substation normal operation. The development of economy and science and technology promote the progress of electric power science in our country. Automation technology has been widely used in substation. The four important functions of telemetry, telecontrol, telecontrol and telecontrol are also realized in substations. This can effectively improve the reliability of power supply and ensure the quality of power supply. However, it also puts forward higher requirements on how to use latching devices to prevent electrical misoperation in substations, and the latching requirements need to be updated accordingly. This paper first summarizes the development situation and the domestic and foreign research trends of the anti-mis-lock device in substation, expounds the general requirements of the anti-mis-locking device in the substation, and introduces several commonly used anti-mis-locking modes: mechanical latchup, mechanical latchup, The advantages and disadvantages of electrical and electromagnetic latchups are introduced, and the main forms of microcomputer locking are introduced in detail, such as off-line type, on-line type and integrated type. This paper briefly introduces the function realization process of RCS9200 microcomputer five-proof locking system, analyzes the actual application of 500kV Xinzhou substation, summarizes the computer key fault and lock fault in practical work. The main faults such as malfunction-proof mainframe and five-guard system are presented, the causes are analyzed, and the solutions are put forward. This paper mainly introduces five main technical improvements: the detailed analysis of the 500kV disconnector and the grounding clogging circuit, and the improvement scheme, and the key steps of adding "detecting the position of the isolating switch mechanism" to the problem of "anti-running air path". To solve the problem of "walking distance" of computer key, to improve the ability of preventing false locking through the application of busbar independent ground knife locking device, to introduce a new type of lock cover for substation, to protect substation lock, and to improve the service life of lock. In the remote control loop of circuit breaker, a remote control latchup relay is added to realize the hard contact locking problem of remote control operation. Then, five specific problems are put forward, and the corresponding improvement scheme is proposed. Finally, the problems in the management of anti-mis-lock are analyzed and the improvement measures are put forward. Finally, the development direction of anti-false locking is prospected.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM63

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