2021 5th International Conference on Green Energy and Applications (ICGEA)最新文献

{"title":"Implementation of Vehicle-to-Grid Scheme in Hydro-Dominant Grid Subjected to Ultra-Low Frequency Oscillations","authors":"Mouhamed Niasse, Qi Zheng, Ai Xin, Federico A. F. Quan","doi":"10.1109/ICGEA51694.2021.9487618","DOIUrl":"https://doi.org/10.1109/ICGEA51694.2021.9487618","url":null,"abstract":"This paper aims to improve the frequency stability in electric vehicles (EVs) penetrated hydro-dominant power grids. Such an environment is subjected to two significant technical challenges. On the one side, the occurrence of ultra-low frequency oscillations (ULFOs) has been frequently noticed in the last two decades. They are intrinsically caused by the hydropower plants and can lead to the hydro-dominant power systems' collapse. On the other side, EVs have demonstrated the ability to participate in the power system's frequency regulation by injecting stored power back in the grid. However, this contribution from vehicle-to-grid (V2G) has to match EV users' convenience. In this paper, the ability of a V2G system to participate in the damping of hydro-dominant grid ultra-low frequency oscillations is investigated. The occurrence of ultra-low frequency oscillations is successfully reproduced in the chosen test system. A comparison between the system with and without proposed V2G schemes is carried out, showing V2G schemes' positive effect on the grid frequency stability. The results are then shown and discussed to validate the effectiveness of the proposition in terms of damping the ULFOs while still satisfying EV users' convenience.","PeriodicalId":237027,"journal":{"name":"2021 5th International Conference on Green Energy and Applications (ICGEA)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123652654","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":"Fine-Grained Power Load Modeling Based on Electricity Consumption Behavior and Minimum Working States of Electrical Appliance's Current","authors":"Yaru Liu, Cuiyun Gao, Chong Hu, Naiqing Jin, Yukai Huang","doi":"10.1109/ICGEA51694.2021.9487611","DOIUrl":"https://doi.org/10.1109/ICGEA51694.2021.9487611","url":null,"abstract":"Accurate load modeling is critical for power system planning and operational decision making especially for new energy power grid. In this paper, we proposed a method of fine-grained power load modeling based on electricity consumption behavior and minimum working states(MWS) of electrical appliance's current. The current waveforms are reconstructed reversely according to a four-layer-model which contains power consumption schedule, the working modes of electric appliance, the sub-states, minimum working states which includes short-time stable state, long-time stable state, and transient state. Using IFFT to rebuild the voltage and the current waveforms of short-time stable state and long-time stable state, and using IWT to rebuild the ones of transient state. The 24-hour-superimposed current and total power of single-phase were calculated for three phases separately, and the 24-hour Peak and Valley values of power of single-phase was also recorded in 4 kinds of different time slots. The experiment shows that: (1) the four-layer-model constructed in this paper has strong operability; (2) The distribution of peak and valley value for different schedules can be fine-grained simulated to realize the optimization for peak reduction.","PeriodicalId":237027,"journal":{"name":"2021 5th International Conference on Green Energy and Applications (ICGEA)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128109943","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":"Grid-Connection Control of Doubly Fed Variable Speed Pumped Storage Unit","authors":"G. Gong, Jingliang Lv, Xinjian Jiang, Xudong Sun","doi":"10.1109/ICGEA51694.2021.9487601","DOIUrl":"https://doi.org/10.1109/ICGEA51694.2021.9487601","url":null,"abstract":"To avoid the harmonics voltage interfering in the control of the stator voltage amplitude and phase of doubly fed induction machine in the process of grid-connection, and improve the accuracy of voltage synchronization, this paper presents a grid-connection control method based on ButterWorth low-pass filter. The parameter design principles of ButterWorth filter are analyzed based on the filter's responding characteristic and the stator harmonics voltage component. Instead of using the phase of stator voltage, the filtered voltage amplitude is used for phase synchronization. The compensators of rotor current and rotor initial position are designed to control the amplitude and phase of the filtered stator voltage respectively. The simulation results show that compared with the traditional control strategy, the proposed control strategy has better dynamic response performance and higher control accuracy. A 30kW experimental platform is implemented to verify the effectiveness of the proposed control strategy.","PeriodicalId":237027,"journal":{"name":"2021 5th International Conference on Green Energy and Applications (ICGEA)","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114271192","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":"Experimental Validation of an Enhanced Solar Still with a Rough Rotating Drum","authors":"M. Younis, Carine Habchi, G. Ayoub, M. Ahmad, K. Ghali","doi":"10.1109/ICGEA51694.2021.9487621","DOIUrl":"https://doi.org/10.1109/ICGEA51694.2021.9487621","url":null,"abstract":"Solar stills are considered a promising option for obtaining fresh water when needed, especially in rural areas. However, the low water yield is the main drawback of these systems. Therefore, several studies have been dine to increase the system's water yield. In this work, a rough rotating drum was integrated with the system to enhance the obtained water yield. A predictive mathematical model was developed to account for the obtained water yield under the effect of roughness. The model was validated experimentally, where results showed a good agreement between modelled and experimental results.","PeriodicalId":237027,"journal":{"name":"2021 5th International Conference on Green Energy and Applications (ICGEA)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132925632","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":"Data-based analysis of the optimal direction of a photovoltaic system for remote sensor nodes for a case study in Germany","authors":"Na-Na Shen, Jian Wu, Gabriela Molinar, W. Stork","doi":"10.1109/ICGEA51694.2021.9487593","DOIUrl":"https://doi.org/10.1109/ICGEA51694.2021.9487593","url":null,"abstract":"Solar based self-sufficient smart sensor nodes are broadly used for remote monitoring purpose especially for applications, where the assessment for human is hostile. For the power supply of these smart sensor nodes, solar panels and battery are usually used. In order to collect the solar energy more efficiently, the solar penal of the sensor node should be directed optimal. In this paper a study at Schnarrenberg with the coordinate [48.8°, 9.2°] in Germany has been done, to determine the optimal tilt and orientation angle, which maximize the received solar energy at an inclination in the worse months, nevertheless without weakening of the solar energy of other months. Finally, with the calculated average monthly solar energy on this inclination, the minimum value was taken to determine the peak sun hours to size of the solar panel. Our approach is evaluated by applying the hourly solar global and diffuse irradiance on the horizontal surface from the open metadata of the German Weather Service, between 2013 and 2017. The evaluation results can be used for distributing sensor nodes along high voltage overhead lines in the framework of PrognoNetz research project.","PeriodicalId":237027,"journal":{"name":"2021 5th International Conference on Green Energy and Applications (ICGEA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129932826","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":"Unit Commitment with Integrated Energy System Considering Primary and Secondary Frequency Regulation","authors":"Xuan Zhang, Xingquan Ji, Ying Zang, Yumin Zhang, Qingxiang Hao, Yundong Xiao","doi":"10.1109/ICGEA51694.2021.9487592","DOIUrl":"https://doi.org/10.1109/ICGEA51694.2021.9487592","url":null,"abstract":"With the development of renewable energy generation (REG) such as wind power, the economic operation of power system is greatly challenged by the phenomenon of wind curtailment. To reduce the operation cost of power system and improve the accommodation capacity of renewable energy, a unit commitment (UC) model with integrated energy system (IES) considering primary frequency regulation (PFR) and secondary frequency regulation (SFR) is proposed in this paper. Firstly, establishing the model to co-optimize the electric system, gas system and thermal system. Then, for the nonlinear problem of natural gas pipeline flow, an incremental piece-wise method is proposed for linearization, from which the nonlinear non-convex programming problem can be transformed into a mixed integer linear programming (MILP) problem. Finally, 24-bus electric system, 20-bus natural gas system and 16-bus thermal system are used to simulate and verify the proposed model in this paper. Numerical results illustrate that the unit commitment considering integrated energy system is beneficial to improve the energy efficiency and the economy of the system operation.","PeriodicalId":237027,"journal":{"name":"2021 5th International Conference on Green Energy and Applications (ICGEA)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129812452","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":"Energy Management Scheme for Renewable Energy Source based DC Microgrid with Energy Storage","authors":"C. L. Bhattar, M. Chaudhari","doi":"10.1109/ICGEA51694.2021.9487610","DOIUrl":"https://doi.org/10.1109/ICGEA51694.2021.9487610","url":null,"abstract":"Renewable Energies such as solar, wind, fuel cell etc. need to be utilized effectively and efficiently to reduce the carbon foot prints to fulfil the energy demand deficit. The intermittence nature of these energy resources affects energy balance and power quality significantly. Renewable energy resources throw the challenge on the system operator for utilizing the available energy to fulfil the energy demand requirement. However, this paper investigates the power flow management in DC Micro-Grid. The proposed scheme effectively regulates the dc bus voltage and balancing the power flow in the system under all operating scenario and curtail load during the deficit of power. The scheme considers the load category i.e. essential and non-essential load. In support to the energy management scheme, the test condition considers Maximum Power Point Tracking (MPPT) condition and battery State of Charge (SoC) and converter control strategies to regulate the DC bus voltage. The test system of 48V, 300W DC Microgrid system is simulated in MATLAB/Simulink environment and results are studied considering different various conditions.","PeriodicalId":237027,"journal":{"name":"2021 5th International Conference on Green Energy and Applications (ICGEA)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122639610","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 and Application of Zero Discharge Technology for Desulfurization Wastewater of 660MW Coal-fired Unit","authors":"Zhang Shanshan, Wu Qiaoling, Ji Haihong, Li Tinghao","doi":"10.1109/ICGEA51694.2021.9487624","DOIUrl":"https://doi.org/10.1109/ICGEA51694.2021.9487624","url":null,"abstract":"In this paper, the pretreatment, concentration reduction and evaporation crystallization stages of desulfurization wastewater in zero discharge technology were studied and engineering applications were carried out, and the performance of 660MW coal-fired unit zero discharge desulfurization wastewater was evaluated. The results showed that for desulphurization wastewater with a total dissolved solid of about 48768.9 mg/L and a Cl content of about 12507.2mg/L, the pass flue gas evaporation process could realize zero discharge treatment of desulphurization wastewater. The hot smoke content introduced into the drying tower was about 52351.0m3/h, the inlet and outlet smoke temperatures of the drying tower were 374°C and 130°C respectively, the influence on boiler efficiency was about 0.0676%, and the moisture content of drying products was only 0.15%. The content of HCl in the flue gas at the inlet and outlet of the drying tower was 53mg/L and 165mg/L, the mass fraction of Cl removal and volatilization of desulfurized wastewater were 93.10% and 6.90%, the average content of chlorine in fly ash was about 0.225%, which meet the requirements of relevant standards for the comprehensive utilization of fly ash.","PeriodicalId":237027,"journal":{"name":"2021 5th International Conference on Green Energy and Applications (ICGEA)","volume":"129 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123203954","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":"Asynchronous Startup of the Paralleled DC-DC Converters in DC Microgrid Based on the Injected Frequency","authors":"Xuzhou Zhuang, Qinjin Zhang, Yancheng Liu, Pengli Zhu, Yuji Zeng","doi":"10.1109/ICGEA51694.2021.9487597","DOIUrl":"https://doi.org/10.1109/ICGEA51694.2021.9487597","url":null,"abstract":"The droop control of DC-DC converters based on injected AC voltage small-signal realizes current sharing control without communication, but DC-DC converter startup fails when AC voltage amplitude, frequency and phase do not meet sufficient conditions. In order to improve the success rate of the DC-DC converter connected to the DC bus, an asynchronous startup strategy based on phase difference is proposed. The AC and DC voltage conditions of the DC-DC converter connected to the microgrid under the injected frequency droop control are analyzed, and the control function of the circuit breaker is designed by using the voltage signals on both sides of the circuit breaker. The small-signal model is used to analyze the frequency convergence characteristics of AC voltage under the asynchronous startup strategy. The hardware in the loop experiment based on Starsim shows that the asynchronous startup method based on phase difference can realize the smooth connection between the DC-DC converter and DC bus, and improve the dynamic performance of the connection process.","PeriodicalId":237027,"journal":{"name":"2021 5th International Conference on Green Energy and Applications (ICGEA)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115713064","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":"Demand Response Strategy for the Smart Home with the Distributed Photovoltaic Generation","authors":"Mi Guangyao, Tian Jingchao, Cao Lingguo, Z. Yuyong","doi":"10.1109/ICGEA51694.2021.9487566","DOIUrl":"https://doi.org/10.1109/ICGEA51694.2021.9487566","url":null,"abstract":"With the gradual development of the power grid in the direction of intelligence, the rigid demand for auxiliary resources included in the dispatch and control range of the power system in the past is increasing. The intelligent power utilization system is the key to solve the problem of distribute individual user in the unified dispatch of the grid center. In this paper, a smart electricity consumption algorithm based on user-side demand is proposed. This method can ensure the user's right of independent choice on the basis of satisfying demand response constraints, realizing the interaction of multiple sources and loads to a certain extent. The main task of this paper is to consider the influence of distributed photovoltaic power on the algorithm and put user selection the first under the constraints of satisfying demand response. Firstly, the model of the intelligent power consumption system is introduced, and the classification of different loads under system control and its power supply model are given. Then, the paper proposes the concept of user choice, considering the calculation method of the priority of household appliances from multiple angles, which is the core of the control system algorithm. The control algorithm not only considers the influence of distributed photovoltaic power sources connected to the power consumption system, but also considers that user can independently select the working mode of distributed photovoltaic power sources. Finally, in the process of designing the control algorithm, the concept of user interruption is put forward, which is that the user has the right to first execute his own decision and jump out of the algorithm under the condition of demand response. In the subsequent simulation verification, the paper carried out the demand response power conflict experiment with and without the distributed photovoltaic power sources. The simulation results verify that distributed photovoltaic power sources can improve the comfort of user under demand response conditions. When there is no distributed photovoltaic power, the strategy with user interruption algorithm and the strategy without user interruption algorithm are respectively implemented. This comparative experiment verifies that the interruption algorithm improves the user's right to choose.","PeriodicalId":237027,"journal":{"name":"2021 5th International Conference on Green Energy and Applications (ICGEA)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128626109","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}