2021 IEEE 4th International Conference on Renewable Energy and Power Engineering (REPE)最新文献

{"title":"Reimbursement of PV System Deploy: Case Study of a South Africa's Industry","authors":"P. S. Pouabe Eboule, Mokoena Boitumelo, J. Pretorius","doi":"10.1109/REPE52765.2021.9617113","DOIUrl":"https://doi.org/10.1109/REPE52765.2021.9617113","url":null,"abstract":"For almost a decade, the deployment of PV systems has been gaining ground worldwide, but in South Africa, many citizens and investors are still resisting the trend due to the high costs of installation and the materials. Usually, to convince investors in this domain, researchers will evaluate the return of investment of the PV system. However, their evaluation is often based on the data collected online and provided by the PV manufacturer. This study based on an existing grid of a south african industry located in Midrand has helped compare its new grid with the old ones and evaluate the profitability in terms of cost after a certain number of years. The newly installed system is characterized by the electrical power installation of 998 kW with energy storage of 140 kW. The data used were collected after the commissioning of the micro-grid. The obtained results show that in less than ten years from the date of commissioning, the company will have had a return its investment with a surplus of approximately equal to US$567 84.47.","PeriodicalId":136285,"journal":{"name":"2021 IEEE 4th International Conference on Renewable Energy and Power Engineering (REPE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115867440","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}

{"title":"Optimal Real-Time Pricing-Based Scheduling in Home Energy Management System Using Genetic Algorithms","authors":"Asaad Al-Duais, Moayad Osman, M. H. Shullar, M. A. Abido","doi":"10.1109/REPE52765.2021.9617067","DOIUrl":"https://doi.org/10.1109/REPE52765.2021.9617067","url":null,"abstract":"Smart grids are advanced technologies that have already demonstrated a great potential to maintain balance between the demand and supply of electricity via implementation of demand response (DR). A home energy management system (HEMS) is projected to enable DR applications for residential consumers by monitoring, managing, and controlling their energy consumption. This paper proposes a Genetic Algorithm (GA) based HEMS that reallocates and shifts appliances away from peak consumption periods and high electricity prices in order to minimize the electricity bill and the peak to average ratio (PAR). The HEMS receives electricity prices, which are based on real-time pricing (RTP) scheme, from a smart meter and finds the schedule that minimizes the cost and PAR. Our proposed model categorizes appliances into three categories: 1- shiftable interruptible appliances and 2- shift-able uninterruptible appliances and finally 3- fixed base appliances. A new formulation of the problem, which neglects redundant information and considerably reduces the search space, was developed and tested. The results show a substantial improvement in the scheduling problem compared to the conventional formulation reported in literature. The proposed system was able to effectively reduce the cost by 8.7% and PAR by 29%.","PeriodicalId":136285,"journal":{"name":"2021 IEEE 4th International Conference on Renewable Energy and Power Engineering (REPE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132989814","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}

{"title":"Research on the Movement and Partial Discharge Characteristic of Free Metal Particles in GIS","authors":"Ke Zhao, Jingtan Ma, Shan Gao, Hongtao Li, Yujie Li, Hanyan Xiao","doi":"10.1109/REPE52765.2021.9617028","DOIUrl":"https://doi.org/10.1109/REPE52765.2021.9617028","url":null,"abstract":"Free metal particles are one of the main threats to the insulation reliability of gas-insulated switchgear (GIS). Under the action of electric field force and applied voltage, the presence of metal particles will cause the spatial electric field distortion of the GIS, which in turn leads to the degradation of the insulation performance of the GIS. In this paper, a simulation calculation model for charging, force, and movement of free metal particles in UHV GIS is established, and the movement and charging laws of particles under power voltage are studied. The results show that the spatial position distribution of particle movement is mainly in the middle area of the bottom of the GIS enclosure. The spatial position density distribution gradually decreases from the central area of the enclosure bottom to the surrounding space area. As the amplitude of the applied voltage increases, the horizontal and vertical displacements of the particles gradually increase. The maximum horizontal and vertical displacements of the particles gradually decrease with the increase of the particle radius. The particles will be charged and discharged at the full voltage phase. The particles discharge more concentrated at the voltage peak, and the discharge amount is the largest. The simulation results are basically consistent with the experimental results.","PeriodicalId":136285,"journal":{"name":"2021 IEEE 4th International Conference on Renewable Energy and Power Engineering (REPE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114114483","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}

{"title":"Research on UHVDC Transmission Capacity Improvement under the Background of Carbon Neutral","authors":"Changyu Deng, Nan Wei, Z. An, Siwei Liu, Qingru Qi, Dongmiao Wang","doi":"10.1109/REPE52765.2021.9617020","DOIUrl":"https://doi.org/10.1109/REPE52765.2021.9617020","url":null,"abstract":"Under the background of “carbon neutralization, carbon peak”, power generation enterprises vigorously develop clean energy, and some UHVDC supporting thermal power units are replaced by new energy units. Considering that all thermal power plants under construction are put into operation, and the subsequent thermal power plants can not be put into operation as planned, combined with the current limited factors of UHVDC capacity, this paper proposes a scheme from two aspects of controlling the transient overvoltage level and ensuring the collection of DC power, so as to improve the UHVDC transmission capacity. The research shows that the scheme of installing a condenser in the converter station is recommended, which can improve the DC transmission capacity to full power operation, and has no impact on the supply and demand situation in the province and the grid structure at the sending end. “New energy + energy storage + distributed condenser” is recommended to meet the demand of DC power. This study provides an important reference for large-scale new energy units connected to UHVDC System.","PeriodicalId":136285,"journal":{"name":"2021 IEEE 4th International Conference on Renewable Energy and Power Engineering (REPE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116626173","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}

{"title":"A Novel 6T2C Pixel Circuit Based on PWM Method","authors":"B. Liu, Wenxue Huo, Liang Hu, Quansheng Liu, Ji Li, Juncheng Xiao","doi":"10.1109/REPE52765.2021.9617022","DOIUrl":"https://doi.org/10.1109/REPE52765.2021.9617022","url":null,"abstract":"The letter presents a new active-matrix light-emitting diode (AMLED) pixel circuit which breaks the limit that the PWM driving method combined with internal compensation is difficult to obtain the high-bit display. Based on a 10 row panel of 240 Hz, the bit is obviously improved from 3 bits to 8 bits by means of attaching another TFT to divide the equal sub-field of PWM into unequal one. Moreover, simulation results of the proposed 6T2C circuit demonstrate that the current error ratio is below 5.4% (@ Δ Vth = ± 3 V), indicating that this proposed 6T2C circuit is suitable for improving the bits and stability of display system.","PeriodicalId":136285,"journal":{"name":"2021 IEEE 4th International Conference on Renewable Energy and Power Engineering (REPE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116546834","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}

{"title":"Evaluating the Effect of Electrode-normal Magnetic Field on the Bubbles Grown on Horizontal Microelectrodes","authors":"Yang Liu, L. Pan, Hong-bo Liu","doi":"10.1109/REPE52765.2021.9617040","DOIUrl":"https://doi.org/10.1109/REPE52765.2021.9617040","url":null,"abstract":"Water electrolysis is the most feasible way to product super-pure hydrogen. Relatively low efficiency is the greatest obstacle to the popularization of water electrolysis. It was found that imposing magnetic field can increase hydrogen production efficiency, but the detailed mechanism of the enhancement is still lacking an insight understanding regarding to the micro vicinity of the bubbles. To further this research, an alkaline water electrolysis experiment using microelectrodes is performed under the influence of a magnetic field. The bubbles generated on the microelectrodes can be divided into two groups according to their size, and a force analysis of these bubbles was processed. The quantified forces acting on bubbles shows that magnetic field has little impact on the relatively large bubble, but the rotating flow around the large bubble has a considerable impact on the micron-sized bubbles generated at the foot of the big bubble according to the experimental observation. The rotational flow can take micron bubbles away before they converge with large bubbles. This phenomenon may responsible for slower bubble detachment and longer bubble growth cycle in alkaline electrolyte when a magnetic field imposed. The results indicate that probably we should not only focus on the big bubble but the micro bubbles below it, whether magnetic field apply to plate electrodes or other types of electrodes.","PeriodicalId":136285,"journal":{"name":"2021 IEEE 4th International Conference on Renewable Energy and Power Engineering (REPE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125896622","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}

{"title":"Collaborative Planning Strategy for Active Distribution Network of Wind Power-Photovoltaic-Energy Storage Systems Based on Second-Order Cone Relaxation","authors":"Zhong Zheng, S. Miao, Haipeng Zhao, Q. Tu, Songyan Zhang, H. Yin","doi":"10.1109/REPE52765.2021.9617081","DOIUrl":"https://doi.org/10.1109/REPE52765.2021.9617081","url":null,"abstract":"With the increasing penetration rate of renewable energy in power grid, the realization of safe, economic, efficient and reliable renewable energy consumption is one of the most urgent problems to be solved. Collaborative planning strategy for active distribution network(ADN) of wind power-photovoltaic-energy storage systems(ESS) based on second-order cone relaxation(SOCR) is proposed in this paper. Firstly, considering the optimization objectives and constraints of each subject, the optimal planning models of wind power, photovoltaic, ESS and power grid are established respectively; Secondly, SOCR is used to relax the non-convex constraints such as AC power flow constraints to obtain the optimal convex planning model of ADN. Thirdly, analytic hierarchy process(AHP) is used to characterize the interest interaction of wind power, photovoltaic, ESS and power grid, and then collaborative planning strategy of the system is proposed. Finally, the effectiveness of the collaborative planning strategy proposed in this paper is verified through example analysis.","PeriodicalId":136285,"journal":{"name":"2021 IEEE 4th International Conference on Renewable Energy and Power Engineering (REPE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121658420","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}

{"title":"SOC Estimation of Lithium-ion Batteries Based on Adaptive UKF","authors":"Honggang Du, Guangchen Liu, Jianwei Zhang, G. Tian, Shengtie Wang","doi":"10.1109/REPE52765.2021.9617029","DOIUrl":"https://doi.org/10.1109/REPE52765.2021.9617029","url":null,"abstract":"Accurate estimation of the state of charge (SOC) of Lithium-ion batteries is the critical technology for developing Lithium-ion batteries. Aiming at the problem that the noise covariance of the UKF is fixed, an adaptive UKF algorithm is proposed in this paper. The adaptive UKF algorithm can estimate and correct the noise characteristics of the system in real-time, and suppress the possible filter divergence and improve the estimation accuracy of the SOC. By analyzing the simulation results of constant discharge and pulsed variable current pulse discharge, it is proved that the filtering effect of adaptive UKF is better and the accuracy is higher.","PeriodicalId":136285,"journal":{"name":"2021 IEEE 4th International Conference on Renewable Energy and Power Engineering (REPE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116952417","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}

{"title":"Operation and Monitoring Technology of Mobile Wireless Charging for Electric Vehicles","authors":"Shishuai Zhang, Yuhang Liu, Yuchun Chen","doi":"10.1109/REPE52765.2021.9617062","DOIUrl":"https://doi.org/10.1109/REPE52765.2021.9617062","url":null,"abstract":"Facing the increasingly severe pressure on energy conservation and emission reduction, the world's auto industry has entered a period of comprehensive transportation energy transformation. Vigorously developing electric vehicles have become a clear direction for governments of the United States, China, and Europe to develop new energy vehicles. The charging problem is one of the important factors restricting the development and popularization of electric vehicles. Most electric vehicles use a contact-type wired charging method. This wired charging method has many inherent defects: plug-in is easy to produce sparks, easy to wear, difficult to maintain, and not flexible enough, which reduces the driving experience of electric vehicles to a certain extent. The wireless charging technology for electric vehicles developed in recent years provides new ideas for solving the above problems. Combined with the current status of domestic and foreign technology development and recent scientific research work, it has not comprehensively and in-depth considered road conditions and vehicle operating conditions adaptability, operational reliability, scalability, energy efficiency and other practical technical indicators. It is necessary to carry out in-depth research on engineering application technology to solve engineering and practical technical problems such as planning, design, construction, civil engineering, operation, and standardization. Electric vehicles are an important part of the smart grid, and large-scale electric vehicles can also be used as energy storage devices for the grid. The application of stationary and mobile wireless charging technologies can greatly improve the interaction between electric vehicle and grid. In order to increase the reliability and convenience of operation, there is an urgent need to develop an electric vehicle mobile wireless charging section operation and monitoring program, laying a technical foundation for the establishment and construction of the electric vehicle mobile wireless charging demonstration project.","PeriodicalId":136285,"journal":{"name":"2021 IEEE 4th International Conference on Renewable Energy and Power Engineering (REPE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132057898","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}

{"title":"Research on Orderly Charging Control Strategy in Demond Response","authors":"Xiaofeng Peng, Ye Yang, Da Meng, Han Cheng, Yinping Dai, Xiaoqing Zhang, Yulu Zhong","doi":"10.1109/REPE52765.2021.9617080","DOIUrl":"https://doi.org/10.1109/REPE52765.2021.9617080","url":null,"abstract":"The increasing amount of electric vehicle has brought threat on the distribution network reliability, but it also provides great load flexibility opportunities. With appropriate guidance, electric vehicle charging loads can be an important demand response resource. The charging of electric vehicles for demand response can be formulized as a nonlinear multiple-objective optimization problem. This article studies mathematical optimization models for orderly charging in different demand response scenarios and proposes a strategy of orderly charging for demand response. The effectiveness of the ordered charging model and solution method are demonstrated using both simulation data and actual charging data.","PeriodicalId":136285,"journal":{"name":"2021 IEEE 4th International Conference on Renewable Energy and Power Engineering (REPE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128019524","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}