Qing Chen's research while affiliated with Huazhong University of Science and Technology and other places
What is this page?
This page lists the scientific contributions of an author, who either does not have a ResearchGate profile, or has not yet added these contributions to their profile.
It was automatically created by ResearchGate to create a record of this author's body of work. We create such pages to advance our goal of creating and maintaining the most comprehensive scientific repository possible. In doing so, we process publicly available (personal) data relating to the author as a member of the scientific community.
If you're a ResearchGate member, you can follow this page to keep up with this author's work.
If you are this author, and you don't want us to display this page anymore, please let us know.
It was automatically created by ResearchGate to create a record of this author's body of work. We create such pages to advance our goal of creating and maintaining the most comprehensive scientific repository possible. In doing so, we process publicly available (personal) data relating to the author as a member of the scientific community.
If you're a ResearchGate member, you can follow this page to keep up with this author's work.
If you are this author, and you don't want us to display this page anymore, please let us know.
Publications (30)
With the rising popularity of computationally expensive multiobjective optimization problems (EMOPs) in real-world applications, many surrogate-assisted evolutionary algorithms (SAEAs) have been proposed in the recent decade. Nevertheless, high-dimensional EMOPs remain challenging for existing SAEAs attributed to their requirement in massive fitnes...
In the oil and gas production, the oil-water interface should be monitored to warn risks and to optimize the efficiency. The conventional buoyancy method could only be conducted when the production is stopped, not being able to support the production. Thus, many studies have been made to achieve real-time monitoring. Nevertheless, almost none of th...
During a train running at speed, the pantograph-catenary structure atop the train would be influenced by many factors, resulting in disconnections. A timely detection on arcs across this structure helps to guide works on real-time operating and later maintenance, to eliminate latent factors of disconnection. A theory on the generation of arcs is re...
As voltage measuring devices are widely used in the high voltage power system with a primary‐secondary‐fusion structure, electronic voltage transformers are directly connected to the primary conductor and would face much more serious electromagnetic environments than general secondary equipment. As a result, they would still experience failures eve...
Understanding long-term monitoring steady-state errors of capacitor voltage transformers (CVTs) is critical for acquiring accurate and continuous voltage signals from the power grid. However, existing methods cannot maintain good performance over the long term because they cannot update the initial model while primary voltages fluctuate nor maintai...
In the field of insulation monitoring of high-voltage power equipment, the dc leakage current is an important indicator to evaluate the insulation state. However,
$\mu \text{A}$
-level dc leakage currents are usually mixed with mA-level power-frequency ac currents, bringing obstacles to the accuracy of the dc measurement. In this regard, a new ma...
Non-contact three-phase instantaneous voltage measurement is an emerging and challenging topic in modern smart grids. Existing measurement methods can hardly obtain accurate or instantaneous results attributed to the coupled three-phase information. Even though some advanced optimization algorithms have been developed, their performance should be f...
The single-phase to ground fault (SPGF) is very common in power grids. To decrease the fault’s influence on the power supply’s reliability, the neutral point is usually grounded via the Petersen coil, significantly reducing the outage rate. Nevertheless, this coil would weaken the fault current and make the faulty line identification much more diff...
In a wide range of electrical applications, the requirement for noncontact measurement of weak direct currents is continuously increasing. Among all types of dc current sensors, the magnetic modulator (fluxgate) is more suitable for measuring weak dc currents due to its low noise and high stability. As the most common type, the open-loop magnetic m...
The deterioration of cable insulation is a widely acknowledged problem, and detection lays the foundation for maintenance and overhaul. The measurement of Tangent delta (tan
$\boldsymbol {\delta }$
) at very low frequency (VLF) works well on cable insulation detection, nevertheless the conventional method could only be conducted offline, where th...
Uncalibrated capacitive voltage transformers (CVTs) may significantly degrade measurement accuracy, because of the undetected excessive measurement error (ME). In this article, an online detection method is proposed which combines multi-source heterogeneous data composed of CVT measurements, acceptance test errors, and error limits. By measuring th...
Calibration devices in an automatic verification system are used to verify the accuracy of electricity smart meters. As time goes by, calibration devices may experience the metering performance degradation, making results of error tests biased. Therefore, it is of great significance to ensure calibration devices have qualified metering performance....
The single‐phase‐to‐ground faulty line selection methods based on the signals of the frequency above 10 Hz has a low discrimination of fault characteristic signal and characteristic signal may be covered by noise in cases of high‐resistance fault. To solve the problem, a line selection method based on system's own extremely low frequency signal (SO...
Single‐phase to ground fault is the most common line fault in power distribution systems, which may result in an electrical fire and personal safety problems. Particularly, it is more difficult to identify the fault occurring in the system in which the neutral point is grounded via Petersen coil. This paper proposes a new scheme based on line multi...
The non-contact accurate measurement of weak direct current (dc) is very important for various fields, such as the online insulation monitoring of power cables. Compared with other dc current sensors, the magnetic modulator is more suitable for dc measurement with its high sensitivity, low noise, and stable working. Most magnetic modulators adopt t...
The internal insulation condition of capacitor voltage transformers (CVTs) is a key influence factor that affects their measurement performance and safe operation. However, the internal insulation would age along with long-time operation and degrade due to environmental factors, and once the insulation degradation grows, serious damage and even exp...
The capacitor voltage transformer (CVT) is one of the most important measurement equipment in the power system, and its measurement accuracy is a key factor to ensure the safety of the power system and the fairness of electricity trade. To ensure the steady-state measurement accuracy, the conventional calibration is carried out to CVTs before opera...
In this paper, a measuring system based on Print Circuit Board (PCB) Rogowski coils is introduced for high current measurement with multi-conductor structure. A high current up to 300 kA is split into sixteen branches to fulfill engineering requirements. This high current and multi-split structure bring about many problems into measurement. Traditi...
With the wide use of the capacitor voltage transformer (CVT), ensuring its accuracy is important. The conventional method is periodical on-site calibration, which is time-consuming and needs the power cut. This paper proposed an on-line method detecting the ratio error (RE) drift based on the correlation between three phase voltages. Considering th...
Citations
... Another pertinent factor is the high-frequency oscillation overvoltage induced by the high dv/dt pulse voltage transient across windings [27,28]. Such overvoltage can attain up to 2 p. u. between winding layers [29], necessitating moderately larger insulation distances between layers and segments. ...
![[object Object]](https://i1.rgstatic.net/ii/profile.image/425972148248577-1478571082359_Q64/Jiao-Yang-3.jpg)
... The first fault can be considered as the transient equivalent circuit formed when switch S I in Figure 3 is closed at t = 0. Due to the extensive analysis of the transient characteristics of the first fault in previous studies [22][23][24][25], this paper does not revisit its features. Instead, the analysis in this paper concentrates exclusively on the characteristics of the secondary fault. ...
... Traditionally, the FG method (or zero-flux) of current/magnetic field sensing principle (Fig. 3) is different from other magnetic-core-based sensing schemes because its characteristic of saturation of the magnetic core plays a key role in detecting current [25]. Magnetic bar materials usually exhibit hysteresis curves and become saturated after a certain amount of current (or magnetic field) is applied. ...
... The CVT is mainly composed of a capacitive voltage divider and electromagnetic unit [27]. A schematic of a capacitive voltage transformer (CVT) and the equivalent model of the capacitive voltage transformer (CVT) are shown in Figure 1. ...
... The cable detection methods are mainly divided into offline detection methods and online detection methods. Offline detection methods include dielectric loss factor test, partial discharge test, DC voltage test, AC voltage test, etc. Online monitoring methods include the DC superposition method, DC component method, AC superposition method, etc. [4][5][6]. All these methods are based on the detection of current and discharge phenomena caused by the electric field, which have two obvious shortcomings. ...
... Images were obtained from two popular datasets, namely the BEPM and OSU datasets. The fused results were obtained using CVT [35], DTCWT [36], LP [37], RP [38], MSVD [39], FusionGAN [40], and our proposed IFGAN. Based on the observations made in Figure 16, it becomes evident that our approach excels at preserving comprehensive details and distinctive characteristics derived from the viewable picture. ...
... Furthermore, the packing approach for electric meters is primarily determined by their geometric shape, with a certain quantity of electric meters sorted and loaded into turnover boxes, followed by subsequent loading onto corresponding vehicles using the first-in, last-out principle. Regrettably, this traditional electric meter distribution process does not take into account the unique characteristics of electric meters, including their type, size, stability, directionality, precision, and fragility [17]. ...
![[object Object]](https://i1.rgstatic.net/ii/profile.image/272485270683661-1441976959519_Q64/Linqiang-Pan.jpg)
... However, this approach, requiring periodic power interruptions, suffers from low verification efficiency and inherent delays. Consequently, there is an imperative to investigate online evaluation methods applicable under non-power outage conditions [4]. ...
![[object Object]](https://i1.rgstatic.net/ii/profile.image/886256615555073-1588311451388_Q64/Chan-See.jpg)
... Literature [15] proposes a method of charged assessment of metering error for voltage transformers, which uses open-close capacitance sensors and other auxiliary equipment to construct a new type of voltage transformer and use it as a physical standard, which is connected to the primary side of the transformer to be assessed through an insulated lifting device, thus realizing a short-term on-line assessment of the transformer and obtaining its metering error. In exploring the secondary load characteristics of the CVT metering error, literature [16] analyzes that when the load is increased from 30 VA to 40 VA, the VDR decreases to 0.04% and the phase deviation increases by 0.9133′. It has a significant impact on the measurement accuracy of CVT. ...
... Changes in the distance between the coil and the conductor, for instance, have less of an effect. The motherboard also has a double-layer design that shields it from magnetic field interference that is perpendicular to the board [16]. ...
