As a starting point for any discussion on condition monitoring it is useful to define what is meant by the term, and to describe how it relates to other techniques used in the operation and maintenance of machines, such as alarm and shut down systems or methods for failure and problem investigation. Vibration of a machine can be represented in time domain in terms of its phase and amplitude which. A complete guide to condition based maintenance the ins and. The complete conditionbased maintenance cbm guide fiix.
This is done by observing the deviation of the transformer parameters from their expected values. Skf electric motor condition monitoring emcm overview. Condition monitoring electrical plant and equipment. Oct 15, 2014 its time to stop guessing when your equipment is going to fail, and start knowing. Spider80x machine condition monitoring system crystal. An overview of stateoftheart partial discharge analysis techniques for condition monitoring abstract. Through the utilization of various nondestructive testing and measuring techniques, predictive maintenance determines equipment status before a breakdown occurs. Rules for classification and construction i ship technology. 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. However, many of these tools are expensive when used for low power motors. Different methods of fault detection are used in electrical conversion system condition and operation monitoring today. The generator bearing can also be monitored by vibration analysis techniques, similar to those used with the gearbox.
All a series of reports detailing the bene condition of vital rotating machinery problems have been detected by the fits of such a machine monitoring sys in the plant is one such scheme. The need for improved performance of the huge investment in industrial plant particularly electrical generating machinery in recent times necessitates the application of condition monitoring techniques in its maintenance. The need for improved performance of the huge investment in industrial plant particularly electrical generating machinery in recent times necessitates the application of condition monitoring techniques in. 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. The paper analyzes, in brief, various online condition monitoring techniques for rotating electrical machines. Condition monitoring of electrical assets using digital irt. Cbm introduces new maintenance techniques, which can be difficult to implement due to resistance within an organization. Patel department of electrical engineering, ganpat university, kherva384012, department of electrical engineering, ganpat university, kherva384012. Predictive maintenance is the complement of preventive maintenance. The use of condition monitoring allows maintenance to be scheduled. Pdf all machines, no matter how well they are designed, calculated or produced have the tendency to fail at some point of their existence.
Condition monitoring solutions for motors and generators enabling the right maintenance at the right time brochure. There are two approaches for temperature measurement. It does not require any direct contact for inspection jun and xinyu, 2011, ibarahim and amani, 2011. Each frontend features eight analog input channels and two channels that may be software selected as tachometer inputs for the analysis of rotating machinery. The manufacturers and users of these drives are now keen to include diagnostic features in the software to improve salability and reliability. Condition monitoring using computational intelligence methods promotes the various approaches gathered under the umbrella of computational intelligence to show how condition monitoring can be used to avoid equipment failures and lengthen its useful life, minimize downtime and reduce maintenance costs. Transmission line insulator condition monitoring is of increasing interest with the ageing of many transmission lines constructed since. In this context, various online and offline condition monitoring and diagnostics, nondestructive inspection techniques and surveillance are used. Preventative measures are well known and should be utilised at every instance. Nuregcr7000, essential elements of an electric cable. The common premise of pdm is that the data gathered by regular monitoring is technically analysed.
Similar to the mechanical system, condition monitoring of the generator and power electronics is necessary for early detection of failures. Overdoing maintenance can cause equipment to deteriorate faster. As already discussed in brief elsewhere in the paper, practice of online as well as offline condition monitoring has been adopted as a part of preventive maintenance and predictive maintenance in some of the critical electrical equipment. It sets out general procedures to be considered when setting up a condition monitoring programme for all machines, and. 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. According to henry 1979 an ideal predictive or condition monitoring maintenance technique should have the following characteristics. Condition monitoring techniques for electrical equipmenta. Irt techniques are very beneficial and reduce the cost for the process of condition monitoring. Lee has more than 40 years experience in the public. Service life of electrical cable and condition monitoring. Condition monitoring techniques include thermal analysis, vibration analysis, corrosion and erosion. Electrical equipment of electrical installations and the application of condition monitoring techniques to optimise the asset utilisation as part of the asset management strategy. Condition based maintenance requires an investment in measuring equipment and staff upskilling so the initial costs of implementation can be high.
Brochure condition monitoring solutions for motors and. Based on these evaluations, the essential elements of an effective cable condition monitoring program have been identified. It is hoped that the tools presented in this article will help asset managers and engineers apply predictive maintenance approaches and condition monitoring to process pumps, as well as improve management of pump assets to provide capacity for. Condition monitoring system an overview sciencedirect topics. 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. A maintenance carried out when it is deemed necessary, based on periodic inspections, diagnostic tests or other means of condition monitoring. It is one in monitoring to monitor and analyse the downs on monitored equipment. Introduction power transformer condition monitoring is generally considered as one of the most important condition monitoring cm techniques in power systems. Condition management in process and manufacturing is one of the key strategies for ensuring plant productivity, reliability and integrity.
Such a holistic condition monitoring approach should combine a number of condition monitoring modules including online partial discharge. As against preventive maintenance which is timebased, condition monitoring is condition based. Transformers are the most critical assets of electrical transmission and distribution system. Predictive maintenance by electrical signature analysis to induction motors 491 interesting and little explored field surfaces, which is the introduction of predictive maintenance techniques based on electrical signature analysis. Maintenance management of electrical equipment condition. With predictive maintenance pdm, organizations are setting aside the ol. Mousavi1 1iran university of science and technology iust, tehran, iran.
Electrical stress is highest near the conductor so it is common for the insulator closest to the conductor to be in a degraded condition. Component selection for condition based maintenance, parameter selection for monitoring condition, evaluation of condition monitoring results are issues influencing the effectiveness of condition based. The timefrequency signal processing based methods have been extensively used with current, vibration, and acoustic emission signals to detect the diverse symptoms of motor failures. Condition monitoring using computational intelligence. Nowadays, there are many monitoring techniques and tools that ensure a high reliability of a rotating electrical motor. Mar 26, 2015 training manager dean whittle explains the reason for condition monitoring filmed at maintec 2015.
The following list of condition monitoring techniques, grouped by several category types, shows the extent technology has moved monitoring ahead. Pdf 20 ieee 1st international conference on condition. Keywordscondition monitoring, induction machines, nonlinear least squares, compressors abstractthis paper presents a park transformbased method for preprocessing stator current data from a motor and transforming it into a form that is useful for fault detection and diagnostics. Vibration signature analysis vibration is a cyclic or pulsating motion of a machine or machine component from its point of rest1. Conditionbased maintenance predictive techniques emaint. Condition monitoring of an electrical machine using irt is a technique that relies majorly on temperature measurement of the equipment under test. The different failure mechanisms of electrical machines and several monitoring techniques are analysed. This international standard provides guidance for condition monitoring and diagnostics of machines. Service life of electrical cable and condition monitoring methods. We know that transformer failure is inconvenient and costly. Condition monitoring using computational intelligence methods.
Condition based maintenance and monitoring software fiix. The irt camera detects the loose connection, overload condition, and many additional problems. Nicholas lee poh choo peng, beng electrical, consultant, carlo solutions. A piezoelectric transducer providing a voltage signal proportional to acceleration is often used. As one step toward the future smart grid, condition monitoring is important to facilitate the reliability of grid asset operation and to save on maintenance cost 1. Condition monitoring doesnt work for every asset, so knowing which ones dont support sensors or other monitoring tools and techniques can save you lots of time and money later. To confirm the adequacy of condition monitoring under normal operational and loca conditions to confirm the condition based qualification methodology. This report summarizes several of the most effective and commonly used condition monitoring techniques available to detect damage and measure the extent of degradation in electric cable insulation. Implementation strategies and tools for condition based. Abstract induction motor drives are the most widely used electrical drive system and they typically consume 40 percent of an industrialized nations total generating capacity.
Assessment of electrical cable condition monitoring tests sponsored by u. Fluke predictive maintenance is a conditiondriven preventive maintenance program. Condition monitoring techniques of power transformers. To confirm the adequacy of condition monitoring under normal operational and loca conditions to confirm the conditionbased qualification methodology to confirm acceleration factors for accelerated aging tests and.
A conditionmonitoring task is a scheduled task used to detect the potential onset of a failure so that action can be taken to prevent such failure. Condition monitoring and fault diagnosis of electrical motors. Compilation part notice rtmfentr of this paper is a part of the following report. Condition monitoring also called predictive maintenance uses nonintrusive techniques to judge the status of equipment or its parts performance.
Cbm introduces new maintenance techniques, which can be difficult to implement due to. An overview of stateoftheart partial discharge analysis. Partial discharge pd techniques for measuring the condition of ageing hvmv switchgear by neil davies, director, ea technology international throughout the world, the electricity transmission and distribution industry is experiencing major issues. Authors contributions author sam wrote the first draft of. Temperature speed visual sound electrical discharge curents vibration lubricant condition skf generalpurpose thermometer pen tmtp 200 accurate contact temperature measurement of general equipment. What are condition monitoring and preventive maintenance. The use of condition monitoring allows maintenance to be scheduled, or other actions to be taken to prevent. Prediction and scheduling of maintenance by condition. This acceleration signal can be integrated to give the velocity or. Recently, research has picked up a fervent pace in the area of fault diagnosis of electrical machines.
Condition monitoring and diagnostics of machines general. 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. Condition monitoring of electrical machines is essential because it helps avoiding heavy production losses in industry. Just doing condition monitoring will not improve reliability, as dean explains. Condition monitoring or, colloquially, cm is the process of monitoring a parameter of condition in machinery vibration, temperature etc. It is also utilized for monitoring the zno arrester. Rules for survey after construction part 7 or the abs. 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. Condition monitoring and diagnostic techniques for mv vacuum.
Condition monitoring techniques for electrical equipment. 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. Woodley principles and methods as a starting point for any discussion on condition monitoring it is useful to define what is meant by the term, and to describe how it relates to other techniques used in the operation. Authors contributions author sam wrote the first draft of the paper and author smgm read and approved the final manuscript. Various techniques for condition monitoring of three phase. Vibration monitoring is one of the oldest condition monitoring techniques and is widely used to detect mechanical faults such as bearing failures or mechanical imbalance 22. Asset condition assessment electrical condition monitoring skills. Electrical condition monitoring reliabilitysolutions. Ageing, maintenance plans, condition monitoring techniques, power transformers. Techniques to detect potential failure are known as on condition maintenance tasks.
A potential failure is an identifiable condition that indicates that a functional failure is either about to occur or is in the process of occurring. Insulation feature transmission line insulator condition. Page 1 condition monitoring tests and predictive maintenance can help pump operators determine when to overhaul pumps in a way that minimizes costs. Therefore, holistic strategies of condition monitoring are an important component. Condition monitoring of transformers is the process of acquisition and processing of data related to various parameters of transformers so as to predict and prevent the failure of a transformer. The first key ingredient is a condition that can be monitored. Condition assessment of high voltage insulation in power. It is the parent document of a group of international standards which cover the field of condition monitoring and diagnostics. Predictive maintenance by electrical signature analysis to. Maintenance management of electrical equipment condition monitoring based part 2 photo credit.
546 692 465 851 1312 408 1000 1161 695 998 1006 601 1329 1050 797 954 737 778 81 213 84 633 481 373 1087 70 266 906 594 440 807 786 531 426 687 1204 1473 889