With the increasing complexity of the power grid,the traditional power maintenance methods are difficult to meet the needs of current power grid maintenance. This paper designs and implements a wireless monitoring system based on wireless communication of multiple single chip computers and CC1310 modules. The system transmits data and instructions through wireless interfaces,controls the opening and closing operations of high-voltage circuit breakers,and measures their characteristic parameters. The reliability test of the system under a series of typical disturbances was carried out in the vacuum switch cabinet. The parallel experiments were carried out on the data communication demonstrator without electromagnetic interference for comparison. In addition,a signal strength experiment is designed to investigate the wireless communication effect at different distances. Through the design and test,it is proved that the design of wireless measurement and control system for high-voltage circuit breaker monitoring is feasible.
The automation equipment status assessment and maintenance work of the substation has very strict requirements for the technical personnel and the maintenance methods to carry out the work in practice. The evaluation of automatic equipment status also requires technical personnel to apply scientific ideas and methods to implement specific work. In order to achieve a better operation status of the substation,the evaluation of the automation equipment status needs to start from the selection and quantification of the evaluation index,and the rational application of the evaluation method to optimize and improve the equipment maintenance and decision work. In the process of substation operation, the application effect of automation equipment can play the supporting role of the substation in the operation of the power system.
输电和配电系统需要为客户提供高质量、可靠的电力.配电线路问题的检测必须更加精确、一致和彻底,以达到可接受的电能质量.论文的第一部分重点研究了近年来高压输电线路的跳闸率和运行缺陷,正如录音所示,电气故障和跳闸的原因有多种,包括雷击、风偏差放电、外力损坏、鸟类灾害、覆盖的冰和波浪、污染闪光等等.输电和配电线路的问题会影响电能质量.当故障发生时,断路器自动闭合,因为控制电路与断路器同步,不需要人为干预.当系统配电层出现暂时性问题时,自动重合闸有助于保持系统正常并长时间运行.本文介绍了一种独特的配电线路故障级别的结构化互连结构和分类方法,以及一种基于断路器自动重合闸特性的克服方法.
With the rapid development of the national economy, the installation technology of electromechanical automation equipment plays an increasingly important role in urban construction. This paper studies the installation technology of electromechanical automation equipment from the perspective of finite element analysis, analyzes its practical application, and gives relevant suggestions, which is of great significance for promoting the development of urbanization and high-quality development of transportation industry.
A fault diagnosis method of three-phase reconfigurable inverter is proposed. When any power switch in the inverter has an open circuit fault,first calculate the DC side midpoint voltage and its deviation from the reference DC midpoint voltage,and determine whether the fault occurs in the power switch of the upper bridge arm or the lower bridge arm according to the polarity of the DC side midpoint voltage deviation. Secondly,reconstruct the inverter topology,calculate the DC side midpoint voltage and its deviation from the reference DC midpoint voltage again,and determine which phase the fault occurs according to the polarity of the DC side midpoint voltage deviation,so as to finally determine the failed power switch. The effectiveness and rapidity of the fault diagnosis method are verified by simulation experiments.
