FEM based 3D modelling of partial discharge detection and localization in an oil-filled power transformer using piezoelectric acoustic sensor

2020 ◽  
Vol 87 (9) ◽  
pp. 586-596
Author(s):  
Sorokhaibam Nilakanta Meitei ◽  
Kunal Borah ◽  
Saibal Chatterjee
Keyword(s):  
Lead Zirconate Titanate ◽  
Power Transformer ◽  
Piezoelectric Sensor ◽  
Lead Zirconate ◽  
Detection Methods ◽  
Probe Point ◽  
Insulation Degradation ◽  
Acoustic Pressure Wave ◽  
Wave Distribution ◽  
Detection And Localization

AbstractThe main cause of insulation degradation is due to partial discharges (PDs) occurring inside the transformer, and its detection and localization are the most effective, non-destructive methods to assess the insulation condition of the transformer. Among the PD detection methods, the acoustic PD detection technique is popular because of its various advantages. The acoustic PD detection method for accurate PD source localization becomes quite challenging when PD occurs inside the transformer core and windings. As the acoustic sound wave can be distorted and vibration with its distribution, so the type of PD sensors with their setting in the transformer should be thoroughly investigated and chosen. In this work, via simulation, the acoustic sound distribution inside the power transformer due to PD occurs is studied. Based on the knowledge of acoustic pressure wave distribution, a Lead Zirconate Titanate (PZT-5H) sensor is designed using Finite element method based COMSOL Multiphysics software and placed it on the outer walls of the transformer for PD detection and localization. The PD induction position has been recognized from the sensor signal using an artificial neural network. The results of PD detection and localization by the proposed piezoelectric sensor and COMSOL probe point are in good agreement.

scholarly journals Piezoelectric Sensor-Embedded Smart Rock for Damage Monitoring in a Prestressed Anchorage Zone

Sensors ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 353
Author(s):  
Quang-Quang Pham ◽  
Ngoc-Loi Dang ◽  
Jeong-Tae Kim
Keyword(s):  
Lead Zirconate Titanate ◽  
Impedance Measurement ◽  
Experimental Tests ◽  
Piezoelectric Sensor ◽  
Measurement Model ◽  
Lead Zirconate ◽  
Test Cases ◽  
Electromechanical Impedance ◽  
Concrete Damage ◽  
Impedance Monitoring

In this paper, a piezoelectric sensor-embedded smart rock is proposed for the electromechanical impedance monitoring of internal concrete damage in a prestressed anchorage zone. Firstly, a piezoelectric sensor-embedded smart rock is analyzed for impedance monitoring in concrete structures. An impedance measurement model is analyzed for the PZT (lead zirconate titanate)-embedded smart rock under compression in a concrete member. Secondly, a prototype of the smart rock embedded with a PZT sensor is designed in order to ascertain, sensitively, the variations of the impedance signatures induced by concrete damage in an anchorage zone. Thirdly, the performance of the smart rock is estimated from a numerical analysis and experimental tests. Variations in the impedance signals under compressive test cases are analyzed in order to predetermine the sensitive frequency band for the impedance monitoring. Lastly, an experiment on an anchorage zone embedded with the smart rocks and surface-mounted PZT sensors is conducted for the impedance measurement under a series of loading cases. The impedance variations are quantified in order to comparatively evaluate the feasibility of the sensor-embedded smart rock for the detection of internal concrete damage in the anchorage zone. The results show that the internal concrete damage was successfully detected using the PZT-embedded smart rock, thus enabling the application of the technique for anchorage zone health monitoring.

Evaluation of Properties of Lapped PZT Ceramics and Silicon Cantilever Based on Eutectic Bonding and Dicing Process

2010 ◽  
Vol 663-665 ◽  
pp. 999-1003
Author(s):  
Yi Gui Li ◽  
Jian Sun ◽  
Jing Quan Liu ◽  
Chun Sheng Yang ◽  
Dan Nong He ◽  
...  
Keyword(s):  
Lead Zirconate Titanate ◽  
Energy Harvester ◽  
Piezoelectric Sensor ◽  
Lead Zirconate ◽  
Pzt Ceramics ◽  
Eutectic Bonding ◽  
Energy Harvesters ◽  
Silicon Cantilever ◽  
Piezoelectric Layers ◽  
Device Applications

Piezoelectric sensor can produce voltage when deflected (function as an energy harvester) while piezoelectric actuator can deflect when a voltage is applied. Different device applications have different requirements on the thickness and in-plane geometry of the Lead Zirconate Titanate(PZT) piezoelectric layers and thus have their own processing difficulties. In this paper, PZT-Au-Si cantilever is fabricated by eutectic bonding and dicing process.The properties of lapped PZT ceramics and silicon cantilever is also evaluated. The PZT-Au-Si cantilever applications for both piezoelectric actuators and energy harvesters have been confirmed.

scholarly journals Intrinsic Sensing Properties of Chrysotile Fiber Reinforced Piezoelectric Cement-Based Composites

Sensors ◽  
2018 ◽  
Vol 18 (9) ◽  
pp. 2999 ◽  
Author(s):  
Jianlin Luo ◽  
Chunwei Zhang ◽  
Lu Li ◽  
Baolin Wang ◽  
Qiuyi Li ◽  
...  
Keyword(s):  
Cyclic Loading ◽  
Lead Zirconate Titanate ◽  
Piezoelectric Coefficient ◽  
Piezoelectric Properties ◽  
Electrical Response ◽  
Sol Gel ◽  
Piezoelectric Sensor ◽  
Cement Composite ◽  
Lead Zirconate ◽  
Micro Hardness

Lead-zirconate-titanate (PZT) nanoscale powder was first synthesized by the sol-gel method, then PZT and 0–3 type PZT/chrysotile fiber (CSF)/cement composite (PZTCC) wafers were fabricated after grind-mixing PZT powder with strontium carbonate and/or cement, ductile CSF in tandem with press-sintered process, respectively. The crystal structure (XRD), microstructure (SEM), piezoelectric properties after surface silver penetration, and polarization of the PZT and PZTCC wafer were investigated. Furthermore, self-sensing responses under either impulse or cyclic loading and micro-hardness toughness of PZTCC were also investigated. Results show that the incorporation of CSF and cement admixture weakens the perovskite crystalline peak of PZTCC; reduces the corresponding piezoelectric coefficient from 119.2 pC/N to 32.5 pC/N; but effectively bridges the gap on the toughness between PZTCC and concrete since the corresponding microhardness with 202.7 MPa of PZTCC is close to that of concrete. A good linear and fast electrical response against either impulse or cyclic loading of the PZTCC is achieved with their respective sensitivity, linearity, and repeatability to 1.505 mV/N, 2.42%, and 2.11%. The sensing responses and toughness of PZTCC is encouraging as an intrinsic piezoelectric sensor for real-time health monitoring of ductile concrete structures.

scholarly journals COMSOL Multiphysics Simulation of Piezoelectric Sensor for Energy Harvesting from Railway tracks

2019 ◽  
Vol 8 (2) ◽  
pp. 5446-5452
Keyword(s):  
Energy Harvesting ◽  
Lead Zirconate Titanate ◽  
Rural Areas ◽  
Piezoelectric Sensor ◽  
Lead Zirconate ◽  
Sensor Nodes ◽  
Piezoelectric Sensors ◽  
Wireless Sensor ◽  
Wireless Sensor Nodes ◽  
Railway Tracks

An energy harvester using piezoelectric sensors is investigated and a model is simulated in COMSOL multipyhsics software to harness energy from railway tracks. In new energy conservative world, new ideas are needed to be implemented. The induced sound wave inside the railway tracks, as a result of rail wheel interaction, is of dynamic in nature. These waves are travelling in the railway tracks for short time of interval and can be easily harvested with the help of piezoelectric sensors and stored inside the batteries for later use. Now a day’s wireless sensor nodes are widely used for measurement of different physical quantities like temperature, humidity etc. and providing essential power to such devices, is a big problem. Energy harvesting from tracks can be used to power wireless sensor nodes installed near to railway tracks, tunnels, and rural areas near railway tracks. The Lead Zirconate Titanate PZT 5H piezoelectric sensors are used to simulate a model in COMSOL.

Convergent-bceam diffraction studies on lead zirconate titanate Ceramics

1986 ◽  
Vol 44 ◽  
pp. 482-483
Author(s):  
M.L.A. Dass ◽  
T.A. Bielicki ◽  
G. Thomas ◽  
T. Yamamoto ◽  
K. Okazaki
Keyword(s):  
Lead Zirconate Titanate ◽  
Direct Proof ◽  
Lead Zirconate ◽  
Subsolidus Phase ◽  
Pzt Ceramics ◽  
Subsolidus Phase Diagram ◽  
Zirconate Titanate ◽  
Two Phases ◽  
Cbd Method ◽  
Titanate Ceramics

Lead zirconate titanate, Pb(Zr,Ti)O3 (PZT), ceramics are ferroelectrics formed as solid solutions between ferroelectric PbTiO3 and ant iferroelectric PbZrO3. The subsolidus phase diagram is shown in figure 1. PZT transforms between the Ti-rich tetragonal (T) and the Zr-rich rhombohedral (R) phases at a composition which is nearly independent of temperature. This phenomenon is called morphotropism, and the boundary between the two phases is known as the morphotropic phase boundary (MPB). The excellent piezoelectric and dielectric properties occurring at this composition are believed to.be due to the coexistence of T and R phases, which results in easy poling (i.e. orientation of individual grain polarizations in the direction of an applied electric field). However, there is little direct proof of the coexistence of the two phases at the MPB, possibly because of the difficulty of distinguishing between them. In this investigation a CBD method was found which would successfully differentiate between the phases, and this was applied to confirm the coexistence of the two phases.

Ion Beam Sputter Deposition Of Ferroelectric Oxide Thin Films

1991 ◽  
Vol 223 ◽  
Author(s):  
Thomas M. Graettinger ◽  
O. Auciello ◽  
M. S. Ameen ◽  
H. N. Al-Shareef ◽  
K. Gifford ◽  
...  
Keyword(s):  
Thin Films ◽  
Lead Zirconate Titanate ◽  
Growth Parameters ◽  
Ion Beam ◽  
Lead Zirconate ◽  
Electro Optic ◽  
Integrated Optical ◽  
Pzt Films ◽  
Ion Beam Sputter Deposition ◽  
Ferroelectric Oxide

ABSTRACTFerroelectric oxide films have been studied for their potential application as integrated optical materials and nonvolatile memories. Electro-optic properties of potassium niobate (KNbO3) thin films have been measured and the results correlated to the microstructures observed. The growth parameters necessary to obtain single phase perovskite lead zirconate titanate (PZT) thin films are discussed. Hysteresis and fatigue measurements of the PZT films were performed to determine their characteristics for potential memory devices.

Mathematical model to predict the characteristics of polarization in dielectric materials: The concept of piezoelectrcity and electrostriction

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Mathematical Model ◽  
Electric Field ◽  
Lead Zirconate Titanate ◽  
Dielectric Material ◽  
Strain Curve ◽  
Dielectric Materials ◽  
Lead Zirconate ◽  
Simulation Software ◽  
Constitutive Law ◽  
Basic Material

Model was developed for the prediction of polarization characteristics in a dielectric material exhibiting piezoelectricity and electrostriction based on mathematical equations and MATLAB computer simulation software. The model was developed based on equations of polarization and piezoelectric constitutive law and the functional coefficient of Lead Zirconate Titanate (PZT) crystal material used was 2.3×10-6 m (thickness), the model further allows the input of basic material and calculation of parameters of applied voltage levels, applied stress, pressure, dielectric material properties and so on, to generate the polarization curve, strain curve and the expected deformation change in the material length charts. The mathematical model revealed that an application of 5 volts across the terminals of a 2.3×10-6 m thick dielectric material (PZT) predicted a 1.95×10-9 m change in length of the material, which indicates piezoelectric properties. Both polarization and electric field curve as well as strain and voltage curve were also generated and the result revealed a linear proportionality of the compared parameters, indicating a resultant increase in the electric field yields higher polarization of the dielectric materials atmosphere.

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