European Journal of Electrical Engineering最新文献_第9页

Harmonic Detection System and Identification Algorithm for Steel Pipeline Defects 钢管道缺陷谐波检测系统及识别算法

European Journal of Electrical Engineering Pub Date : 2021-02-28 DOI: 10.18280/EJEE.230103

Yizhen Zhao, Xinhua Wang, Mingfei Wang, Yu Duan, Lin Yang, Pang Qingfeng, Xuyun Yang

{"title":"Harmonic Detection System and Identification Algorithm for Steel Pipeline Defects","authors":"Yizhen Zhao, Xinhua Wang, Mingfei Wang, Yu Duan, Lin Yang, Pang Qingfeng, Xuyun Yang","doi":"10.18280/EJEE.230103","DOIUrl":"https://doi.org/10.18280/EJEE.230103","url":null,"abstract":"Received: 2 August 2020 Accepted: 14 January 2021 Aiming at the problem of defects detection of steel pipeline, a harmonic detection system was developed based on electromagnetic principle, and the target signal identification algorithm was studied. The Advanced RISC Machine (ARM) Cortex-M3 was adopted to design digital adjustable harmonic excitation source, and its effective output power can up to 70 W. The Field Programmable Gate Arrays (FPGA) and ARM Cortex-M4 were introduced to design 15 channels high speed data collector, which parallel local-storage rate of each channel can reach 4.7 kHz. The electromagnetic focusing excitation array and Tunnel Magneto Resistance (TMR) sensors array were constructed to improve the spatial resolution of the detection system. Meanwhile, the system also integrated GPS positioning and LCD real-time display functions. Furthermore, the algorithm combining Empirical Mode Decomposition (EMD) and variable-scale Stochastic Resonance (SR) was proposed to process signal and enhance the targets. The effectiveness of the instrument and algorithm are well verified in both simulation and experiment. The results show that this method has higher integration and better detection effect, which provides a novel method for non-contact detection of metal material defects and is suitable for engineering applications.","PeriodicalId":340029,"journal":{"name":"European Journal of Electrical Engineering","volume":"224 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114296987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

State Space Modeling and Stability Analysis of a VSC-HVDC System for Exchange of Energy VSC-HVDC能量交换系统状态空间建模与稳定性分析

European Journal of Electrical Engineering Pub Date : 2020-12-31 DOI: 10.18280/ejee.220603

A. Rekik, G. Boukettaya

{"title":"State Space Modeling and Stability Analysis of a VSC-HVDC System for Exchange of Energy","authors":"A. Rekik, G. Boukettaya","doi":"10.18280/ejee.220603","DOIUrl":"https://doi.org/10.18280/ejee.220603","url":null,"abstract":"Nowadays, relevant actors are searching for solutions to produce energy with a low impact on the environment. Indeed, transmitting power via large distances with maintaining low losses is one of the main challenges. To improve electricity communication between countries and offshore wind, a new interconnections line must be built. Therefore, Voltage Source Converter High Voltage Direct Current (VSC-HVDC) transmission is incoming as the exceptive technology in order to address the challenges related to the integration of future offshore wind power plants. In spite of its many advantages, VSC-based HVDC transmission systems can experience unexpected instability and interaction phenomena: Small disturbances that occur continually in VSC-HVDC transmission systems due to the complex VSC based interconnections and an important number of components with non-linear nature that may cause failure. Thus, before installing the HVDC system, there is a significant need for studying a hybrid AC-DC system to guarantee the reliable and stable operation. This paper deals with the stability of a VSC-HVDC system by the use of a small signal stability method; such procedure enables to study the stability of a linearized VSC-HVDC system through state-space modeling and eigenvalue-based stability analysis.","PeriodicalId":340029,"journal":{"name":"European Journal of Electrical Engineering","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132228175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Design and Implementation of Hybrid Pico-Hydro – Photovoltaic (PV) Solar Power Plant in Massy-Gahuku LLG masy - gahuku LLG Pico-Hydro - Photovoltaic (PV)混合太阳能电站的设计与实现

European Journal of Electrical Engineering Pub Date : 2020-12-31 DOI: 10.18280/ejee.220601

Charlie Urame, P. Hoole

{"title":"Design and Implementation of Hybrid Pico-Hydro – Photovoltaic (PV) Solar Power Plant in Massy-Gahuku LLG","authors":"Charlie Urame, P. Hoole","doi":"10.18280/ejee.220601","DOIUrl":"https://doi.org/10.18280/ejee.220601","url":null,"abstract":"Hydro-Electricity and Solar Power are environmentally friendly renewable sources of energy that utilize the potential energy from dammed water and the sun respectively to generate electricity. In this paper is reported a new design and implementation of combining solar and hydro-electric power. The turbine and gearbox system used in this design is fabricated from scarp parts of used appliances. The hydro head of the Pico-Hydro plant commissioned was 5m which accumulated a hydraulic potency of the stream of about 5.886kW. The prime mover of the generator consisted of a modified crossflow turbine that is coupled with a gearbox to amplify the rpm of the system. A 500W synchronous generator was driven by the prime mover to generate raw phase shifted AC power. This raw power was rectified with a 25 A full wave rectifier and used in conjunction with 12 V 400 AH deep cycle battery bank system to supply power to a newly furnished double storey house. The generator output through the full wave rectifier is connected to a load controller for optimal charge efficiency. The load controller is connected to the battery bank through a Programmable Logic Controller (PLC). The PLC activates a dummy resistive hot water element when the battery bank is fully charged. The Arduino GSM module monitors the entire process and automatically sends notification via a SIM interface to the system administrator notifying the system administrator of the on/off state of the heating element.","PeriodicalId":340029,"journal":{"name":"European Journal of Electrical Engineering","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134174691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mitigation of Certain Power Quality Issues in Wind Energy Conversion System Using UPQC and IUPQC Devices 采用UPQC和IUPQC装置缓解风能转换系统中某些电能质量问题

European Journal of Electrical Engineering Pub Date : 2020-12-31 DOI: 10.18280/ejee.220606

Pandu Ranga Reddy Gongati, Ramasekhara Reddy Marala, Vijaya Kumar Malupu

{"title":"Mitigation of Certain Power Quality Issues in Wind Energy Conversion System Using UPQC and IUPQC Devices","authors":"Pandu Ranga Reddy Gongati, Ramasekhara Reddy Marala, Vijaya Kumar Malupu","doi":"10.18280/ejee.220606","DOIUrl":"https://doi.org/10.18280/ejee.220606","url":null,"abstract":"Due to limited conventional energy sources and to meet the increase of load demand there is a need for utilization of renewable energy sources. Among the all renewable energy sources wind energy is widely used and is highly sustainable as compared to other sources of energy. Many wind energy conversion devices working with doubly fed induction generators and synchronous generators and it is integrated to the grid produces the power quality issues like as voltage sags, swells, harmonics, voltage imbalance and short interruptions etc. Many power electronic based Flexible AC Transmission Systems (FACTS) are designed to solve above problems and facilitate to meet the required power demand. In this paper, UPQC (Unified Power Quality Conditioner) and IUPQC (Improved Unified Power Quality Conditioner) models are designed to mitigate the above power quality issues. In this paper, mainly voltage sags, voltage swells and harmonics are considered as a power quality issues to analyze the UPQC and IUPQC devices. The conventional PID controller is employed in control circuit of both the devices. It also discusses the comparative analysis between UPQC and IUPQC devices. The MATLAB/SIMULINK Software is used for above analysis.","PeriodicalId":340029,"journal":{"name":"European Journal of Electrical Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114339516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Numerical Simulation of Free Convection in a Three-Dimensional Enclosure Full of Nanofluid with the Existence a Magnetic Field 具有磁场的纳米流体三维封闭体中自由对流的数值模拟

European Journal of Electrical Engineering Pub Date : 2020-12-31 DOI: 10.18280/ejee.220602

Said Bouchta, M. Feddaoui

引用次数: 1

Using Adaptive Second Order Sliding Mode to Improve Power Control of a Counter-Rotating Wind Turbine under Grid Disturbances 利用自适应二阶滑模改进电网扰动下逆转风力发电机组的功率控制

European Journal of Electrical Engineering Pub Date : 2020-12-31 DOI: 10.18280/ejee.220604

Adil Yahdou, A. B. Djilali, Z. Boudjema, F. Mehedi

引用次数: 1

A Research on Selection of Appropriate Stability Index under Adverse System Conditions for the Assessment of Voltage Stability of an IEEE 14 Bus Power System ieee14母线电力系统电压稳定性评估中不利系统条件下适宜稳定指标的选取研究

European Journal of Electrical Engineering Pub Date : 2020-12-31 DOI: 10.18280/ejee.220605

P. Kushwaha, Chayan Bhattacharjee

{"title":"A Research on Selection of Appropriate Stability Index under Adverse System Conditions for the Assessment of Voltage Stability of an IEEE 14 Bus Power System","authors":"P. Kushwaha, Chayan Bhattacharjee","doi":"10.18280/ejee.220605","DOIUrl":"https://doi.org/10.18280/ejee.220605","url":null,"abstract":"For voltage stability assessment at a given operating point, various types of voltage stability indices (VSIs) have been proposed in the literature. In this paper, the voltage stability assessment of an IEEE-14 bus system is done for performance comparison of different types of VSIs available, under certain critical and practical stressed operating conditions (SOCs). The performance comparison of various VSIs under the considered SOCs is not reported in the literature. Such SOCs include the combinational occurrence of – variation in inductive loading, single line to ground (SLG) fault and effect of one generation unit tripped. These SOCs are the prime cause of voltage collapse of any node/line. The results show the performance of various VSIs with respect to line number, contingency ranking of the line, power margin, effects of loading and SLG fault. These VSIs are also instrumental in critical line and node analysis (CLNA) which is useful in the choice of proper location for reactive power compensation required. The simulated results provide the best performing VSI for accurate prediction of voltage instability under any considered SOC. This information is essential for voltage stability assessment of a particular line under multiple causes of voltage collapse.","PeriodicalId":340029,"journal":{"name":"European Journal of Electrical Engineering","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130935243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Anti-Windup FOPID-Based DPC for SAPF Interconnected to a PV System Tuned Using PSO Algorithm 基于PSO算法调优的SAPF与光伏系统互联的抗关闭fopid DPC

European Journal of Electrical Engineering Pub Date : 2020-10-30 DOI: 10.18280/ejee.224-503

Ghania Boudechiche, M. Sarra, Oualid Aissa, J. Gaubert, B. Benlahbib, Abderezak Lashab

引用次数: 5

A New Control Stratum Applied to Two Adaptation Stages Based on Adaline-Type Neuronal Predictive Control in a Photovoltaic Solar Conversion Chain 基于adaline型神经元预测控制的光伏太阳能转换链双自适应控制层

European Journal of Electrical Engineering Pub Date : 2020-10-30 DOI: 10.18280/ejee.224-508

Ihssane Chtouki, P. Wira, M. Zazi, A. Cherif, S. Meddour

引用次数: 1

Characterization of Switching Transients in Low Voltage Power Systems of Tea Factories in Sri Lanka 斯里兰卡茶厂低压电力系统开关暂态特性研究

European Journal of Electrical Engineering Pub Date : 2020-10-30 DOI: 10.18280/ejee.224-504

Earl A. R. L. Pannila, M. Edirisinghe

{"title":"Characterization of Switching Transients in Low Voltage Power Systems of Tea Factories in Sri Lanka","authors":"Earl A. R. L. Pannila, M. Edirisinghe","doi":"10.18280/ejee.224-504","DOIUrl":"https://doi.org/10.18280/ejee.224-504","url":null,"abstract":"Received: 20 April 2020 Accepted: 26 September 2020 Voltage transients caused by various motors and electrical equipment of tea factories in Sri Lanka have been observed and analyzed. While reporting the major components of transients, this work extends it aspires to investigate the risk of having faults in a threephase induction motor by monitoring and analyzing the transient voltage waveforms during the starting period. Therefore, common mode transient investigations have been followed. Transient voltage signals have been obtained from high end test setup and altogether 588 waveforms have been analyzed in both the time and frequency domains. In DOL and Star-Delta starting, highest transient amplitude of 688.2 V and 572.1 V have been observed respectively. Highest transient amplitude of 976.4 V and 980.5 V were observed in DOL and Star-Delta switching respectively. Withering and rolling sections dominates over other stages, generating high amplitude transients in average, reflecting same endangerment in energy calculations as presented in voltage integral. DOL starting transients carries fast rise times as 14 ns and in Star-Delta it is 28 ns. In order to assist with the exegesis of these data, transient parameters like rise time, duration, highest peak, etc.... have also been presented in statistical basis.","PeriodicalId":340029,"journal":{"name":"European Journal of Electrical Engineering","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124884864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1