2 edition of Analysis of on-line monitoring system for insulation diagnosis. found in the catalog.
Analysis of on-line monitoring system for insulation diagnosis.
Bernardo Vicente Vargas Hernandez
MSc thesis, Electronic and Electrical Engineering.
INL/ EXT Online Monitoring Technical Basis and Analysis Framework for Large Power Transformers; Interim Report for FY Nancy J. On-line partial discharge diagnosis. The OMS is a portable, IEC compliant on-line partial discharge (PD) diagnosis system designed for the short-term and long-term evaluation of the insulation condition in medium-voltage and high-voltage assets under ://
In order to reduce pollution effects, utilities perform costly maintenance jobs that become very excessive and sometimes ineffective because they are not applied on time. To make a more efficient use of human and material resources, it is necessary the use of diagnostic tools. In Mexico, since , the national utility CFE uses monitoring systems for detecting the leakage current in power select article Statistical analysis of the effects of graphite crucible on viscosity measurement of silicate melts. select article Low-cost electro-acoustic system based on ferroelectret transducer for characterizing liquids. select article Model based insulation fault diagnosis for lithium-ion battery pack in electric vehicles. https
Utilizing advanced UHF technology, the PDMG-RH system, a member of the highly successful PDMG-R family, is designed for GIS installations. It collects PD data from UHF sensors (couplers) installed on the GIS and transmits the information to software for automatic interpretation and analysis by Expert Software, allowing incipient faults to be avoided and the condition of the long term health of This book covers major components of a high voltage system and the different insulating materials applied in equipment, identifying measurable materials suitable for condition assessment, and also analyses insulation fault scenarios that may occur in power equipment. Suitable for power system engineers, associated with high voltage equipment, students in electrical power engineering, short
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Power transformer insulation fault location is the key to improve the stability of power transformer. A Bayesian network based on power transformer insulation fault on-line monitoring An on-line monitoring system is particularly suitable for. an on-line diagnosis. Well known and long time used paper-oil insulation system stands on the threshold of a new :// Incipient fault diagnosis of a power transformer is greatly influenced by the condition assessment of its insulation system specifically oil/paper insulation.
In recent times, a number of intelligent methods based on AI techniques, Artificial Neural Network and Fuzzy Logic have been used to predict incipient faults in a power transformer based on its insulation studies under various kinds of power cable system using an on-line monitoring system.
The pulse was generated in an insulation defect of a cable joint in the position CB1 and was captured by the HFCT sensors located in the positions CB1 (0 m), CB2 ( m), CB3 () and GIS-1(), see Figure 2a.
The bandwidth of the Dissolved gas analysis (DGA) [5, 6] and partial discharge (PD) pattern recognition  have been adopted for fault diagnosis and condition assessment of transformer insulation. The neural A new on-line, nonintrusive monitoring system, able to observe the aging of an ac machine winding insulation is described.
The principle of this system consists of detecting small variations of Abstract - Partial discharge monitoring is an effective on-line predictive maintenance test for motors and generators at volt and above, as well as other electrical distribution equipment.
The benefits of on-line testing allow for equipment analysis and diagnostics during normal production. within the insulation system, therefore A simplified on-line insulation system model is derived for analysis and interpretation of the measured data.
Experimental results on a 15 hp induction motor under simulated insulation degradation conditions show that the proposed technique is a very sensitive method capable of detecting incipient signs of insulation degradation.", Partial discharge (PD) measurements performed online can provide important information regarding insulation system reliability.
However, PD detectors suitable for online measurements (or monitoring) should be endowed at least with tools that are able to deal with noise and multiple PD sources. PD source identification tools that can exploit data streams from other sensors are, moreover, very The prototype system for partial discharge monitoring presented in this chapter is the effect of several years of research, the results of which have already been presented, among others in (Sikorski & Walczak, ; Sikorski, ).In the mentioned literature items one can find more information on project assumptions and criteria for the selection of individual components of the :// insulation, spectral content of shell vibration, and load current and voltage .
An overview of monitoring techniques used to evaluate the transformer functioning based on specific measurements is given below. The first considered technique is the Dissolved gas analysis (DGA). When IEEE Transactions on Dielectrics and Electrical Insulation Vol. 20, No. 6; December ABSTRACT Condition-based maintenance (also called predictive maintenance) requires diagnostic tools to determine when significant insulation aging has occurred, and thus when maintenance is necessary to avoid an in-service failure.
Over the years many off-line diagnostic tests and on-line monitoring Testing and monitoring methods for insulation systems of electromagnetic coils have been surveyed in Grubic et al.
.The classical methods used to characterize the quality of a winding insulation can be categorized into off-line testing and on-line monitoring methods, which are shown in Figure off-line testing methods are so far the most industrially accepted  and are usually based on For condition monitoring of the power cable insulation system, different diagnosis procedures are available.
The measurement of partial discharge (PD) activity is still an issue of great :// The VI system presents an effective and user-friendly human-machine interface for on-line bearing condition monitoring, which is of critical importance to real-time fault diagnosis and intelligent Figure 2b shows the frequency spectrum of a PD pulse measured in different positions along a power cable system using an on-line monitoring system.
The pulse was generated in an insulation defect of a cable joint in the position CB1 and was captured by the HFCT sensors located in the positions CB1 (0 m), CB2 ( m), CB3 () and GIS-1( Yang X., Ledwich G., Nielsen S.
() Simulation Study for Analysis of Online Dielectric Measurement Problems on Transformer Insulation System. In: Lee W., Choi B., Ma L., Mathew J. (eds) Proceedings of the 7th World Congress on Engineering Asset Management (WCEAM ). Furanic compounds analysis as a tool for diagnostic and maintenance of oil-paper insulation systems GIS insulation monitoring system using external antenna - T.
KIMURA, T. HARUNAMI, N. KONMA, K. HATATA, On-line monitoring and diagnosis: EDF practices and orientations - P. GUUINIC, A. LE DU, G. SANCHIS, The considered insulation degradation concerns a single turn, turn-to-turn adjacent turns, all turns, and the geometrical thickness insufficiency of the turns’ insulation.
Then, the online monitoring system, based on the Transient Voltage Signature along the winding turns is described following changes in the quality of the insulation because A model for a 3 phase AC machine insulation system is derived and analyzed for both off-line and on-line testing.
Guidelines for interpreting the measured indicators for determining the 1) overall condition and 2) significant degradation for the individual GW and PP insulation for each phase of the stator are given based on the ://.
The book introduces the reader to the major components of a high voltage system and the different insulating materials applied in particular equipments.
During a review of these materials, measurable properties suitable for condition assessment are identified. Analyses are included of some of the insulation fault scenarios that may occur in power ://Most power transformers operating in a power system possess oil-paper insulation.
A serious defect of this type of insulation, which is associated with long operation time, is an increase in the moisture content. Moisture introduces a number of threats to proper operation of the transformer, e.g., ignition of partial discharges (PDs). Due to the varying temperature of the insulation system Diagnostics of Rotor and Stator Problems in Industrial Induction Motors by Fang Duan B.E.
(Telecommunication Engineering), Southwest Jiaotong University, China,