Article
Automation & Control Systems
Cheng Wang, Hongkang Yang, Hongting Hua, Yaosuo Xue
Summary: This article presents a DTMMC-UPS with series configurations on both input/output ac sides, which provides high-voltage grid/load accessing interfaces. The use of copies of T-type legs in the system leads to common semiconductor failure, while the coupling between rectifier and inverter conversions and the confliction between intercell and inner-cell voltage balancing make fault-tolerant control challenging. The article clarifies and diagnoses switch fault types and proposes an improved voltage vector modulation to achieve normal operation on the rectifier and inverter sides.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Energy & Fuels
Dong Sik Kim, Wookyung Jung, Beom Jin Chung
Summary: For apartment complexes in Korea receiving medium-voltage electrical energies, they have the choice between single and general electricity charging contracts. The key factor in choosing a contract is the amount and composition of the consumption, with the general contract having advantages in reducing electricity charges, especially for high consumer and common area consumption.
Article
Engineering, Electrical & Electronic
Sai Tang, Jun Wang, Chao Zhang, Daming Wang, Xin Yin, Zhikang Shuai, Zheng John Shen
Summary: This article presents a new technology for identifying and locating faulty cells in a flying capacitor multilevel converter (FCMC). The technology extracts high-frequency harmonics in the switch node voltage and looks up a preestablished table to identify the fault type and location. Both simulation and experimental results validate the effectiveness of the proposed concept.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2022)
Article
Computer Science, Information Systems
Dehai Zhang, Wenhai Zhang, Changzhi Wang, Xianyong Xiao
Summary: Traditional fault location methods using voltage and current measurement on the medium-voltage (MV) side are costly and complicated. This paper proposes a fault location method based on distributed measurement at the low-voltage (LV) side. By analyzing voltage distribution rules and the influence of distribution transformers, differences in voltage variations for different faults are found. A fault location method based on characteristic voltage at the LV side is proposed, where characteristic voltage is adaptively selected and the fault segment is located based on characteristic current. This method can be applied with existing LV measurement equipment, providing an economical and practical solution for fault location in distribution networks.
Article
Engineering, Electrical & Electronic
Zhichao Feng, Ruohan Yang, Zhijie Zhou, Hongtian Chen, Changhua Hu
Summary: This article presents a new fault diagnosis and tolerance (FDT) method for sensor failures in vehicles. The method addresses three main problems: unavailable faulty data, difficulty in establishing the analytical system, and inconsistency of expert cognitive ability. A new belief rule base model with multiexpert joint (BRB-ME) is proposed to handle these problems. The BRB-ME model combines observation data and knowledge from multiple experts to address the first two problems, and introduces a multiexpert joint strategy to handle the third problem. An experimental illustration is conducted for accelerometer failure, with a diagnosis accuracy of 97.50% and ensured navigation accuracy under accelerometer failure.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Engineering, Electrical & Electronic
Fabian Olivera, Lucas Souza da Silva, Antonio Petraglia
Summary: This paper presents a design and sizing method for a femto-watt voltage reference, which compensates for temperature by using N-type and P-type standard transistors. The circuit operates efficiently at low power and low voltage, consuming 252 fW at room temperature with proper circuit operation verified through post-layout simulation. Additionally, the circuit exhibits a reference voltage of 65.7 mV, mean temperature coefficient of 89.81 ppm/°C and best temperature coefficient of 10.61 ppm/°C from -40 to 120 °C, and a power supply rejection ratio of -61 dB.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2021)
Article
Chemistry, Analytical
Yongbin Wu, Jianzhong Zhang, Zhengxi Yuan, Hao Chen
Summary: This research proposes a fault diagnosis approach based on vibration signal envelope analysis, aiming to improve the operation reliability of medium voltage circuit breakers (MVCBs) in modern power systems or new energy power stations. The method involves offline fault feature training and online fault diagnosis, using envelope extraction and wavelet packet-energy spectrum to build fault feature vectors. The proposed method reduces signal bandwidth and processing cost by only handling the envelope of the vibration signal.
Article
Engineering, Electrical & Electronic
Qian Xiao, Jinyu Wang, Yu Jin, Linglin Chen, Hongjie Jia, Tomislav Dragicevic, Remus Teodorescu
Summary: The article proposes a novel operation scheme for SM faults in medium-voltage MMC applications, which enhances the ride-through capability of MMC under fault conditions. By controlling capacitor voltages and injecting zero-sequence voltage to maintain the normal operation of MMC, as well as applying the concept of virtual voltage to simplify the modulation process under SM faults.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Alexander G. Lyublinsky, Alexei F. Kardo-Sysoev, Maksim N. Cherenev, Mikhail Vexler
Summary: This study presents experimental research on circuit optimization of drift step recovery diodes (DSRDs) and proposes explicit definitions of DSRD pulse parameters for the first time. The experimental results demonstrate that optimization of different parameters contradicts each other, requiring compromises to be found based on application-specific recommendations.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Energy & Fuels
Franz Trieb, Pai Liu, Gerrit Koll
Summary: This paper presents a simulation model for Thermal Storage Power Plants (TSPP) that can cover highly variable residual load patterns during the transition from fossil to renewable electricity supply. TSPP can generate highly flexible power on demand using electricity surplus from the grid, photovoltaic power, biomass, and natural gas. The feasibility of TSPP is tested for different configurations using a simulation model, and its technical and economical performance are analyzed based on a renewable electricity scenario in Germany.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Engineering, Electrical & Electronic
Jian Xiong, Jianzhong Zhang, Zheng Xu, Zakiud Din, Yeming Zheng
Summary: This article proposes a detection method for sensor failures in the active power decoupling (APD) circuit of the single-phase converter. The voltage and current of the LC branch in the APD circuit are estimated by a dual sliding mode observer (SMO), and the residuals of the estimated and measured signals are calculated. These residuals have high sensitivity to specific sensor faults and can be used to locate the faulty sensors.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Yuxin Liu, Xin Liu, Fei Gao, Dong Liu, Patrick Wheeler
Summary: Auxiliary power supply (APS) plays a crucial role in medium voltage (MV) solid state transformers (SSTs) by providing power to auxiliary units. A new design for isolated APS of an input-series output-parallel (ISOP) SST is proposed in this article. The distributed MV APSs are galvanically isolated by flybacks, and the centralized APS is supplied from the MV APSs via a decoupling four-port medium frequency transformer. A dual-loop control scheme based on APS-fluctuating is proposed to solve the issue of input voltage imbalance in the ISOP system. The proposed system's small-signal model, start-up strategy, and parameter design are investigated, and a 500 V/2.2 kW lab prototype of SST with APS is built with an overall system efficiency of 95.1%.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Energy & Fuels
Sathsara Abeysinghe, Muditha Abeysekera, Jianzhong Wu, Mahesh Sooriyabandara
Summary: The paper proposes a novel systematic methodology for identifying and quantifying the key electrical properties of medium-voltage level distribution networks. The methodology enables the characterization of different types of distribution networks and obtaining 'depth' dependent electrical properties of the models of the networks.
CSEE JOURNAL OF POWER AND ENERGY SYSTEMS
(2021)
Article
Engineering, Electrical & Electronic
Juan Carlos Rodriguez, Felipe Grijalva
Summary: This article introduces the application of capacitive coupling in auxiliary power supplies. A novel mathematical model is proposed to describe high-frequency switching DC-DC regulation, and its advantages are demonstrated through a case study.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2022)
Article
Engineering, Industrial
Choayb Djeddi, Ahmed Hafaifa, Abdelhamid Iratni, Nadji Hadroug, XiaoQi Chen
Summary: The development of new monitoring and diagnostic procedures is essential for modern industry to enhance operational safety and availability. The proposed solution for gas turbine monitoring incorporates an adaptive neural-fuzzy inference system to predict component degradation and achieve high efficiency and reliability.
JOURNAL OF MANUFACTURING SYSTEMS
(2021)
Article
Engineering, Electrical & Electronic
Thomas Tamo Tatietse, Joseph Voufo, Denis Ntamack
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2011)
Article
Engineering, Electrical & Electronic
Joseph Voufo, Joseph Kenfack, Thomas Tamo Tatietse
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2013)
Article
Green & Sustainable Science & Technology
Joseph Kenfack, Olivier Videme Bossou, Joseph Voufo, Samuel Djom
