In this paper, an online detection method based on load classification has been proposed. Several identification parameters are first put forward to classify loads. With these parameters, low-load modeling and monitoring data of the period of industrial users stably out of operation are screened out. Finally, online monitoring is achieved by the principal component
XConsecutive failures detection XLive reporting of number of failed capacitors XAdvance alarm for externally fused SCBs fuse-saving XApplied for banks grounded through CT/ Capacitor (Neutral Voltage Unbalance) Method Discussed in [9]–[11], [15] Method of [13] X X Disclaimer 2 Mentions manual re-set [11], [15] (no demonstration) Disclaimer 2 Mentioned in [15] (no
New Method of Capacitors Failure Detection and Location in Shunt Capacitor Banks Hesam Jouybari -Moghaddam–Western University TarlochanSidhu –University of Ontario Institute of Technology Ilia Voloh –GE Grid Solutions Mohammad Zadeh-ETAP 2018 Texas A&M Protective Relaying Conference. Outline • Introduction • Superimposed Reactance method-Ungrounded
Based on these, a novel signal detecting method is presented. It enables the common node of the two groups of capacitors to connect to the zero voltage, so that the restriction of the driving force is eliminated and the sensitivity of the gyroscope is increased. This method also supports cancellation of DC voltage mismatch and offset voltage
An electromechanical system that can achieve omnidirectional dynamic detection of the electrolytic capacitor surface was designed, and a dataset of six defect types (pin burn,
The performance of the proposed method is tested for various cases including identical faults, simultaneous faults, system voltage unbalance in both single and double wyeconnected shunt capacitor
In this study, the Lift-off Characteristics (LoC) of the hybrid structures are studied, and an effective method for identifying relevant indications such as defect and anomaly for dual-mode sensor response signals with lift-off interference by combining the testing data of both detection modes and the LoC curve is proposed.
针对这种情况,设计了一种基于双电容的在线水分检测装置。 提出了一种新的电容互补积分方法来消除单一数据的限制。 该装置由采样机构和由平板电容器和圆柱电容器组成的双电容器传感器组成。 通过仿真优化确定了电容器极板的最佳结构尺寸。 除此之外,还开发了包含软件和硬件的
This work provides a theoretical explanation for the advantages of DIC 4 D, confirms the theoretical analysis with simulation, and validates the DIC 4 D detection method in the application of...
Aimed at the problems of the poor detection stability and low accuracy of the current grain moisture content detection device in harvesters, a dual-capacitor detection
In that case, an online moisture detection device was designed, which is based on double capacitors. A new method of capacitance complementation and integration was proposed to eliminate...
An electromechanical system that can achieve omnidirectional dynamic detection of the electrolytic capacitor surface was designed, and a dataset of six defect types (pin burn, pin broken, scratch, damage-s, damage-tb, and deformation) to
This work provides a theoretical explanation for the advantages of DIC 4 D, confirms the theoretical analysis with simulation, and validates the DIC 4 D detection method
针对这种情况,设计了一种基于双电容的在线水分检测装置。 提出了一种新的电容互补积分方法来消除单一数据的限制。 该装置由采样机构和由平板电容器和圆柱电容器组成的双电容器传感器组成。 通过仿真优化确定了电容器极板的最佳结构尺寸。 除此之外,还开发了包含软件和硬件的检测系统来估计水分含量。 进行室内动态测量试验,分析温度和孔隙率的影响。 基于影响因素和
In literature, a compre-hensive overview of in-situ techniques is used to evaluate the structural and morphological degradation processes, namely, electrochemical dilatometry, electrochemical quartz crystal microbalance (EQCM), scanning electrochemical microscopy (SEM), electrochemical mass spectrometry, X-ray diffraction (XRD), atomic force mic...
In that case, an online moisture detection device was designed, which is based on double capacitors. A new method of capacitance complementation and integration was proposed to eliminate the limitation of single data. The device is composed of a sampling mechanism and a double-capacitor sensor consisting of a flatbed capacitor and a cylindrical
Aimed at the problems of the poor detection stability and low accuracy of the current grain moisture content detection device in harvesters, a dual-capacitor detection device was designed. The complementarity and integration between the two groups of capacitors were used to improve the detection stability and accuracy. The structure
In that case, an online moisture detection device was designed, which is based on double capacitors. A new method of capacitance complementation and integration was proposed to eliminate...
In that case, an online moisture detection device was designed, which is based on double capacitors. A new method of capacitance complementation and integration was proposed to
In literature, a compre-hensive overview of in-situ techniques is used to evaluate the structural and morphological degradation processes, namely, electrochemical dilatometry,
China and State Grid Anhui Electric Power Company Electric Power Research Institute
In modular multilevel converters (MMCs) of HVDC system, the metallized film capacitors (MFCs) suffer from complex electrical stresses. The aging of MFC is related to the accumulation of self-healing processes, which threatens the safety and reliability of the power system. In this study, a test platform was built for applying DC voltage as well as DC superimposed AC voltage to
A data-driven internal insulation condition identification method for CVTs is proposed and not only the preset typical faults in the method could be identified effectively but also the faults beyond the preset faults could be diagnosed.
However, capacitors are one of the most vulnerable components in MMCs. To identify abnormal capacitors, a condition monitoring method for capacitors is proposed in this paper using the cumulative sum detection of the sliding window algorithm. First, the bilateral cumulative sum algorithm of the sliding window is proposed to extract the switch
This article provides an overview of the current state of separation tools regarding gas chromatography and detection tools in various combinations with mass spectrometry. The aim of this work is to present the present state of the current knowledge on aging processes, with a focus on gas chromatography and mass spectrometry. Then, an
Based on these, a novel signal detecting method is presented. It enables the common node of the two groups of capacitors to connect to the zero voltage, so that the restriction of the driving
In that case, an online moisture detection device was designed, which is based on double capacitors. A new method of capacitance complementation and integration was
In this study, the Lift-off Characteristics (LoC) of the hybrid structures are studied, and an effective method for identifying relevant indications such as defect and anomaly for
In this contribution, we optimize the structure of double-input capacitively coupled contactless conductivity detector (DIC 4 D) that proposed before by our group and successfully applied it in the capillary electrophoresis of inorganic ion analysis.
Jaanus et al. 17 and Stojkovic et al. 18 proposed two electrode pairs C 4 D detector, which are arranged in two different capillary channels. This improvement provided an effective compensation which can suppress of the influence of the parasitic stray capacitance and decrease the baseline conductivity of the separation buffer.
Zemann et al. 6 and Fracassi da Silva et al. 7 proposed the use of C 4 D in capillary zone electrophoresis and proved the advantages of C 4 D. Since then, much effort has been made to improve the performance of the contactless conductivity detectors. Do Lago et al. 8 improved the hardware and optimized the operational parameters.
To decrease the contact resistance and capacity, the gaps between the copper wires were filled with conductive paints. The electrodes and their locations in DIC 4 D were identical to those in C 4 D. To prevent the signal from environmental interferences, a strict electromagnetic shielding was used.
Kang et al. 12, 13 adopted an inductance coupling device to measure the conductivity of C 4 D and proposed a new C 4 D, which is compensated with the electrode impedance by adding a series inductance from a piezoelectric quartz crystal to decrease the coupling impedance and increase sensitivity.
As mentioned in the reference 15, 27, the noise in C 4 D capillary electrophoresis mainly includes thermal noise, chemical noise from the chemical transformations during the electrophoretic run, noise from the signal generator, and ripple of the high-voltage source.
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