Sulit question 2 25 marks dissolved gas analysis dga is a. Complete list of condition monitoring techniques mro. Service life of electrical cable and condition monitoring. To confirm the adequacy of condition monitoring under normal operational and loca conditions to confirm the condition based qualification methodology to confirm acceleration factors for accelerated aging tests and. Developed out of notes for a course in machine condition monitoring given by robert bond randall over ten years at the university of new south wales, vibrationbased condition monitoring. Islam, a novel online technique to detect power transformer winding faults, ieee. Guidance notes on equipment condition monitoring techniques. Condition monitoring is more efficient than reactive maintenance since faults can generally be avoided, thus reducing machine downtime, saving money and prolonging the life of the machine.
Electrical method has the external complex electrode. Dec 31, 2017 condition monitoring is the process of monitoring conditions in machinery such as vibration and temperature to look for signs that a fault may be developing. Is a programmeprocess manual that describes goals, roles, responsibilities, and process. Condition monitoring provides detailed information about the health of plant machinery, alerting maintenance.
Condition based maintenance cbm is a maintenance strategy that monitors the actual condition of an asset to decide what maintenance needs to be done. Oct 27, 2016 means of condition monitoring cm techniques 1. There are two main methods used for condition monitoring, and these are trend monitoring and condition checking. There are various types of condition based monitoring techniques. The use of condition monitoring allows maintenance to be scheduled, or other actions to be taken to prevent consequential. Rotating equipment such as compressors, pumps and motors all exhibit a certain degree of vibration. Over head transmission lines live line maintenance. Jan 21, 2020 home download center electrical engineering books and technical guides power substation guides condition monitoring and diagnostic techniques for mv vacuum switchgear ageing and failure rates the mv vacuum circuit breaker yearly failure rates published in the latest international standards are in the 0. Application of signal processing techniques for condition monitoring. Condition monitoring an overview sciencedirect topics. Condition monitoring has a great potential for enhancement in the reliability of operation, machine uptime, reduction in consequential damage and improving operational efficiency at lower operational cost. In this context, various online and offline condition monitoring and diagnostics, nondestructive inspection techniques and surveillance are used. Condition monitoring and diagnostic techniques for mv vacuum. Authors contributions author sam wrote the first draft of the paper and author smgm read and approved the final manuscript.
The various methods listed may or may not currently be linked within an iot network, but most are suitable for automatic data collection and analysis. Many different techniques can be found for the fault diagnostics and condition monitoring of induction. Methods for arcflash prediction in medium voltage and low. The application of advanced signal processing techniques. Much of this poor communication stems from a lack of understanding of the analysis language, technology capabilities and the coordinat. Condition monitoring systems have been implemented successfully in the offshore wind industry using an extensive array of measurement techniques and analysis methods where both offline visual inspections and online oil, vibration, speed and power quality. Condition monitoring and diagnostic techniques for mv.
For example, if an image indicated a difference between a pulley belt temperature and an ambient temperature, the belt may have worn, be the wrong size, or indicate a misalignment condition. Plant operations condition monitoring saves money and. Application of signal processing techniques for condition monitoring of electrical equipment. Master of technology in electrical engineering condition. What are condition monitoring and preventive maintenance. Condition based maintenance and its associated condition monitoring procedures are ideal for spinning plant because most of the vital. There are a range of condition monitoring techniques that can be used on electrical equipment and the list below indicates some of the commonly used techniques and related applications. As this interest has grown, the literature has also grown 15. This class provides an understanding of electrical condition monitoring techniques that permit attendees to more effectively utilize and apply vital analysis information for day to day and long term reliability improvement efforts. Description vibration analysis techniques for fault analysis acoustic emission techniques for failure analysis nondestructive testing motor current signature. Aug 29, 2020 while condition based maintenance is responsible for monitoring the different components and gives the actual condition, it does not give a solution based on the condition of the equipment. Different techniques for condition monitoring technical. Many utilities monitor the condition of the components that make up a power transformer and use this information to minimize the outage and extend the service life. Moreover, the international standard iso fdis 20958 dealing with condition monitoring and diagnostics of machine systems electrical signature analysis of threephase induction motors sets out.
Condition monitoring techniques are normally used on rotating equipment, auxiliary systems and other machinery compressors, pumps, electric motors, internal combustion engines, presses, while periodic inspection using nondestructive testing ndt techniques and fit for service ffs evaluation are used for static plant equipment such as. Service life of electrical cable and condition monitoring methods. The extent to which condition monitoring is applied to transformers on a system will depend on many factors, amongst which will be the policy of the asset owner, the suitability of the design existing transformers may require. Electrical condition monitoring reliabilitysolutions. As an example the following table presents different techniques which can be. To confirm the adequacy of condition monitoring under normal operational and loca conditions to confirm the condition based qualification methodology. Predictive maintenance by electrical signature analysis to. Condition monitoring was carried out, at one time, by an experienced engineer holding a wooden. Preventative measures are well known and should be utilised at every instance. Integrated condition monitoring technologies ird balancing.
Offline and online motor electrical monitoring and condition. This paper describes the main faults that occur in electrical machines and the diagnostic methods that can be used to detect these faults. On the other hand, predictive maintenance suggests solutions, so that maintenance is carried out before the problem arises. Rotating electrical machine condition monitoring automation. A condition monitoring framework the framework for a condition based monitoring cbm program includes three major steps. Vibration of a machine can be represented in time domain in terms of its phase and amplitude which. In particular, the technology generically called motor circuit analysis available from an increasing. Vibration signature analysis vibration is a cyclic or pulsating motion of a machine or machine component from its point of rest1. This book provides an clear examples on each and every topics covered in the contents of the book. Condition monitoring of rotating electrical machines.
For such condition based maintenance to be possi ble, it is essential to have knowledge of the machine condition and its rate of change with time. Over head transmission lines live line maintenance techniques. Condition monitoring systems of wave energy converters. Common failures in threephase induction motors consider the following brief description of the most common failures that can be avoided through the adoption of condition monitoring methods. Fourth, an evaluation must be performed to decide which predictive and proactive techniques to implement inhouse, which to outsource, and identify those that are not applicable. Cbm dictates that maintenance should only be performed when certain indicators show signs of decreasing performance or upcoming failure. The existing condition monitoring techniques at generating and distributing stations involve dga dissolved gas analysis and electrical physicochemical analysis of transformer oil. Looseness of mechanical parts, vibration, temperature, pressure, wind. A summary is provided of the causes of failure damage, ageing, and electrical deterioration and reduced cable life with the developing tools to predict and analyse such failures as part of a continuous process of monitoring the condition of the asset.
Some of major technologies are regular inspection and preventive maintenance, condition based monitoring and diagnostic techniques. Iii of the raicm vibration analysis level i vai training manual, pages 722 through 26. Condition monitoring colloquially, cm is the process of monitoring a parameter of condition in machinery vibration, temperature etc. Asset condition assessment electrical condition monitoring skills. Industrial, aerospace and automotive applications written by robert bond randall is very useful for aeronautical engineering aero students and also who are all having an interest to develop their knowledge in the field of space craft and space engineering. The purpose of these guidance notes on equipment condition monitoring techniques is to provide a single abs document containing information related to the subject and to be used as a resource supplement for choosing appropriate condition monitoring techniques where referred to in appendix 7. Condition monitoring techniques for electrical equipmenta. General condition monitoring categories o fluid contamination iso cleanliness, ferroraphy o machine health wear metals associated with plant components q nondestructive testing. Assessment of electrical cable condition monitoring tests sponsored by u. Jan 14, 2003 increasing interest has been seen in condition monitoring cm techniques for electrical equipment, mainly including transformer, generator, and induction motor in power plants, because cm has the potential to reduce operating costs, enhance the reliability of operation, and improve power supply and service to customers. Many of todays pdm programs miss the vital communication link that ties supervision, maintenance technicians, planners, and all levels of production together. The collection, storage, comparison, and evaluation of data taken from a machine to establish the running condition of that machine. Before the connection is hot enough to result in equipment failure or possible ire, the patterns are easily seen through an ir imaging camera, the condition identiied and corrected. Rules for survey after construction part 7 or the abs.
Apr 15, 2020 the early diagnosis of incipient gear faults can noticeably reduce the gear failure rate by using efficient condition monitoring techniques and hence can increase the reliability and availability of the entire electromechanical system significantly. Partial discharge pd is classified as both a symptom of degradation as well as a stress mechanism of degradation and will dominate as one of the main degradation mechanisms for medium voltage electrical cables 2. Condition monitoring is a form of predictive maintenance where continuous monitoring of the performance of machine or condition of the specific part is monitored which will affect the quality of the product. Emerging techniques in condition monitoring of electrical apparatus in the department catering to the sponsored by teqipiii 711, september 2020 coordinators prof. Presently, the well established condition monitoring techniques are based on steady.
Nine methods for condition monitoring of motors are described. Continuous monitoring of the equipment and earlier detection of potential failures can facilitate a more proactive and a comprehensive arc. Abstractincreasing interest has been seen in condition moni toring cm techniques for electrical equipment, mainly including transformer, generator, and. Literatures are accumulated on developing intelligent cm systems with. Song, condition monitoring techniques for electrical equipment a literature survey, ieee trans. The main function of condition monitoring is to provide this knowledge. Note that some of these electrical measuring techniques are appropriate for monitoring the condition of mechanical equipment that is connected to the electrical. Figure 2 infrared thermograph electric motor bearing. Such techniques are an enhancement to, but are not a replacement for, the protection applied to a transformer. Knowing the approximate temperature differences would be important in determining if. Implementation strategies and tools for condition based. Table 2 presents both manual and latest automated analysis techniques proposed by different researchers for condition monitoring of electrical equipment using. Mousavi1 1iran university of science and technology iust, tehran, iran.
In electrical equipment incipient faults are often characterized by variations in temperature, vibroacoustic signature, etc. Apr, 2017 power transformers are a key component of electrical networks, and they are both expensive and difficult to upgrade in a live network. The methods used in system health assessment depend on plant infrastructure, operational criticality, process work flow, and ease of repair and. Condition monitoring techniques for electrical equipment. Routine and diagnostic tests are currently used for condition monitoring and appraising the. Jul 02, 2019 the following list of condition monitoring techniques, grouped by several category types, shows the extent technology has moved monitoring ahead. Techniques for condition monitoring of medium voltage cables muhammad sha.
Condition monitoring as an advanced maintenance technique. Condition monitoring of electrical machines is a field which continuously demands improvement, especially as the tasks performed by these machines become more demanding and complex. The application of advanced signal processing techniques to. This chapter focuses on the detection of tooth localized faults tlfs in gears. Condition monitoring and fault diagnosis of electrical drive. Pdf condition monitoring of power transformers shubham. Vibration, temprature etc in order to identify a significant change which is indicative of developing a fault. Transformers are also tested for various electrical parameters of windings during maintenance shutdown. The condition monitoring techniques described in this report are applicable, in general, for nuclear power plant electric cable systems used for lowvoltage less than vac and 240vdc power and instrumentation and controls applications, and mediumvoltage. Electrical engineering condition monitoring of power apparatus semester i sr. Electrical signatures analysis for condition monitoring of. Introduction condition monitoring cm is a process of monitoring a parameter of condition in machinery eg.
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