{"title":"Detection of Inverter Leakage Current Based on Harmonic Extraction","authors":"Zihu Wang, Yuanhong Liu, Hongqing Qu, Rui Li, Xu Zhou","doi":"10.1109/EI256261.2022.10117455","DOIUrl":"https://doi.org/10.1109/EI256261.2022.10117455","url":null,"abstract":"This paper mainly introduces a classification and extraction method of leakage current, and a method for suppressing leakage current. First, the two-stage BOOST+HERIC photovoltaic grid-connected circuit is used for simulation. Then, the measurement of the complete current is done on the result of the simulation. Based on the measured current, harmonic extraction is done. Finally, the leakage current is suppressed.","PeriodicalId":413409,"journal":{"name":"2022 IEEE 6th Conference on Energy Internet and Energy System Integration (EI2)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124026800","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}
Mintong Zhao, Jia-jia Huan, Xin Huang, Tao Yu, Qiaoyi Ding
{"title":"Optimal Planning of Distributed Generation Based on African Vultures Optimization Algorithm","authors":"Mintong Zhao, Jia-jia Huan, Xin Huang, Tao Yu, Qiaoyi Ding","doi":"10.1109/EI256261.2022.10116298","DOIUrl":"https://doi.org/10.1109/EI256261.2022.10116298","url":null,"abstract":"With the continuous impact of environmental pollution, the traditional generator represented by fossil fuels is gradually being replaced by renewable energy generators. Different from the conventional optimal planning, which only includes photovoltaic (PV) and wind turbines. This paper adds the use of fuel cells (FC) and miniature steam turbines with PV systems and wind turbines, which can make up for the defect of fluctuation of its output power. In addition, a multi-objective model considering power loss, voltage profile, and investment cost is established and solved by the African vultures optimization algorithm (AVOA). Finally, the simulation is based on IEEE 33 and 69 node distribution network (DN) systems. The results show that AVOA has a fast convergence speed and strong optimization characteristics, and can improve voltage distribution after distributed generation (DG) access. The simulation results show that the power loss and voltage profile decreased by 57% and 58% at the IEEE 33 and 64% and 61% at the IEEE 69 node after being connected to DG.","PeriodicalId":413409,"journal":{"name":"2022 IEEE 6th Conference on Energy Internet and Energy System Integration (EI2)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128539594","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":"Improving HVRT of Offshore Wind Farms by Bunding with Thermal Power Plants","authors":"Yong Lin, Shuxin Tian, Hao Yu, Panpan Wang, Honglin Chen, Runbo Chen","doi":"10.1109/EI256261.2022.10116107","DOIUrl":"https://doi.org/10.1109/EI256261.2022.10116107","url":null,"abstract":"The high voltage ride through (HVRT) performance of the multi-offshore wind farms and thermal power plants bundled system (MOWTPPBS) meets the standard requirements, which is one of the key technologies to ensure the safety and stability of the system. This paper investigates the effect of bundled thermal power plants on the HVRT capability of multi-offshore wind farms. The theory analysis show that the thermal power units can increase the short-circuit ratio (SCR) of the MOWTPPBSs; At the same time, the thermal power units can also regulate reactive power into the MOWTPPBS by the excitation regulator according the terminal voltage variations. Both the two above aspects can improve the HVRT capacity of the MOWTPPBSs. Finally, a model of an actual MOWTPPBS is built on PSCAD/EMTDC to verify the reasonableness of the above research results.","PeriodicalId":413409,"journal":{"name":"2022 IEEE 6th Conference on Energy Internet and Energy System Integration (EI2)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127160904","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":"Impacts of DGs in Active Distribution Network Considering Bi-Directional Power Flow and Carbon Emission Flow Theory","authors":"Zhaoyuan Chai, Xinwei Shen, Hongbin Sun","doi":"10.1109/EI256261.2022.10117424","DOIUrl":"https://doi.org/10.1109/EI256261.2022.10117424","url":null,"abstract":"Power grid is facing a low-carbon transition and the carbon emission flow (CEF) theory has become a useful tool to simulate the carbon consumption clearly. Studies have shown that when distributed generators (DGs) connected to distribution network, assuming that either node receives power flow only from the upstream node, the carbon intensity (CI) of downstream node would be affected. However, the carbon intensity of the upstream node is also affected if there is a bi-directional power flow in the system. This article focuses on the impacts of DGs in active distribution network (ADN). By utilizing the graph and data from revised IEEE 33 bus system, we are capable of not only analyzing bi-direction power flow with corresponding CEF in ADN, with case studies illustrating the CI of each node and the line with reverse power flow, but also proposing a simple optimal dispatch model considering CEF modeling, which could be solved without iterative method thus distinguish from previous research on this issue.","PeriodicalId":413409,"journal":{"name":"2022 IEEE 6th Conference on Energy Internet and Energy System Integration (EI2)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130041343","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}
Zihao Dan, Fengchen Yang, Kaikai Pan, Chen Yan, Xiaoyu Ji, Wenyuan Xu
{"title":"A Novel EMI Attack Exploiting the Control Vulnerability of Photovoltaic Inverters","authors":"Zihao Dan, Fengchen Yang, Kaikai Pan, Chen Yan, Xiaoyu Ji, Wenyuan Xu","doi":"10.1109/EI256261.2022.10116254","DOIUrl":"https://doi.org/10.1109/EI256261.2022.10116254","url":null,"abstract":"With the rapid development of distributed generation(DG), the penetration rate of photovoltaics(PVs) in the power grid continues to increase. Therefore, various security issues faced by PV inverters have also become a major challenge to ensure the stability of the power grid.Due to the complex and open environment of PVs, attackers are more likely to access key devices such as grid-tied inverters, thereby causing damage to the entire power grid. Taking advantage of the above characteristics, this paper proposes a novel electromagnetic interference(EMI) attack against inverters, instead of cyber attacks that have been explored well in many other research works. It injects a bias signal into the PV inverter sensor through EMI, so as to change the sensor value finally transmitted to the controller. An attacker can tamper with the sensor value in this way. This paper also analyzes the vulnerability in the inverter control algorithm, and exploits the vulnerability to cause damage to the inverter through EMI attacks.The attack was verified on a commercial inverter from Texas Instruments. We present the induced DC voltage offset corresponding to different EMI frequencies of different sensors to demonstrate that EMI attacks can independently control different sensors on the inverter. In addition, we also analyze the inverter control algorithm and the possible consequences of attacks, further evaluate the consequences of the attack through simulations (we do simulations instead of real device tests to ensure safety). And the results show that this novel attack can shut down/burn the PV inverter.","PeriodicalId":413409,"journal":{"name":"2022 IEEE 6th Conference on Energy Internet and Energy System Integration (EI2)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129143739","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}
Yi Li, Tianyu Fang, Kun Wang, Xiaofeng Zhou, Li Xin, Runyu Cai
{"title":"Secondary Battery Energy Storage System Based on Real-Time Synchronous Data","authors":"Yi Li, Tianyu Fang, Kun Wang, Xiaofeng Zhou, Li Xin, Runyu Cai","doi":"10.1109/EI256261.2022.10116810","DOIUrl":"https://doi.org/10.1109/EI256261.2022.10116810","url":null,"abstract":"With the popularity of electric vehicles, a large number of power batteries are facing retirement. This paper constructs the physical structure of secondary battery energy storage system based on real-time synchronous data (SBESS-RSD), fully exploring the residual value of retired batteries. After considering the differences of the secondary batteries, this paper establishes the working modes and dispatching plans such as direct connection, balancing maintenance and idle state, realizing the functions of power following, fluctuation smoothing, peak load shaving. Finally, this paper carries out field tests in areas with limited PV access. The test results proved that the SBESS-RSD could reduce the maximum peak-to-peak difference by 60%, the peak-to-valley difference of transformer load by 20%, and the transformer load rate by 12% through the peak-filling mode, which effectively supported the grid's absorption of distributed PV.","PeriodicalId":413409,"journal":{"name":"2022 IEEE 6th Conference on Energy Internet and Energy System Integration (EI2)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122364217","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":"Analysis of an Overhead Line Coincidence Failure Event in HVDC Network and Strategy Optimization","authors":"Guangming Xin, Rui Chen, Tianxiao Huang, Xiaofei Wang, Xiang Ren","doi":"10.1109/EI256261.2022.10117380","DOIUrl":"https://doi.org/10.1109/EI256261.2022.10117380","url":null,"abstract":"The removal of short circuit fault current in DC transmission engineering is a difficult point in power engineering. In recent years, HVDC circuit breakers with the ability of short circuit current removal have been demonstrated and applied in many DC projects. The HVDC circuit breaker structure and control logic are complex, and the DC protection and DC circuit breaker need to be coordinated directly. This paper analyzes a case of reclosing failure after permanent grounding fault of overhead line in HVDC power network engineering, and puts forward an optimization scheme of control strategy.","PeriodicalId":413409,"journal":{"name":"2022 IEEE 6th Conference on Energy Internet and Energy System Integration (EI2)","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126901795","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":"Migration and Reproduction Algorithm and Its Application in Hierarchical Coordinating Economic Dispatching of Multi-microgrid System","authors":"Renwu Yan, Yunzhang Liu","doi":"10.1109/EI256261.2022.10116817","DOIUrl":"https://doi.org/10.1109/EI256261.2022.10116817","url":null,"abstract":"The optimal operation of multi- microgrid system is the basis to ensure the economic and environmental benefits of microgrid operation. For diverse equipment and discrepant load in every micro-grid, the paper proposes a new versatile optimization called Migration and Reproduction Algorithm (MARA), which can be used to solve coordinated dispatching for multi-microgrids system. On the coordinated dispatching strategy model during off-peak periods for multi-microgrid system, simulation results showed that the proposed algorithm can realize that the multi-microgrids system coordinated dispatching more efficient and economic. Meanwhile, Compared with Grey Wolf Optimizer (GWO) and Harris hawks optimization (HHO), the proposed algorithm is proven with faster convergence speed and better optimization ability.","PeriodicalId":413409,"journal":{"name":"2022 IEEE 6th Conference on Energy Internet and Energy System Integration (EI2)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132423882","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 Technology Framework of Integrated Energy System and Recent Progress","authors":"Yajun Zou, Wei Wang, Dawei Wang, Yanbo Wang, Xiaojun Wang, Weitao Chen","doi":"10.1109/EI256261.2022.10116729","DOIUrl":"https://doi.org/10.1109/EI256261.2022.10116729","url":null,"abstract":"Along with the need to balance economic development with emission reductions, clean and efficient utilization of energy has remained a strategic and research focus on a global scale in recent years. Integrated energy system (IES), which integrates the production, transportation, distribution, conversion, storage and consumption of various energy sources enables the integrated management and economic dispatch of electricity, heat, gas, etc., and plays a critical role in the comprehensive utilization of energy. Building the key technology framework of IES and revealing its development status are of great significance for guiding the planning and operation decision-making of IES. This paper summarizes key technologies of IES and their recent development progress based on the previous technology-focused reports. The paper aims to prompt discussions and inform the further work needed to chart the path of IES in the future.","PeriodicalId":413409,"journal":{"name":"2022 IEEE 6th Conference on Energy Internet and Energy System Integration (EI2)","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132263742","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 Prediction of Dynamic Current Carrying Capacity of 110kV oil Immersed Transformer","authors":"Aogang Hou, Xuzhu Dong, J. Ruan, Yongqing Deng, Chen Zhang, Qiaofeng Chen","doi":"10.1109/EI256261.2022.10117217","DOIUrl":"https://doi.org/10.1109/EI256261.2022.10117217","url":null,"abstract":"In order to alleviate the problem of high short-term load rate in summer, improve the power transmission and transformation capacity of urban power system and improve the utilization rate of transformer equipment, the dynamic current carrying capacity prediction of 110kV oil immersed transformer is studied in this paper. This paper first calculates the hot spot temperature, top oil temperature and 24-hour life loss percentage of the transformer by using GB 1094.7. Secondly, the long-term and short-term memory neural network model (LSTM) is trained and verified. Compared with ARIMA model, it highlights the high accuracy and rapid convergence of LSTM, and predicts the power load data in the next 24 hours according to the historical data of power load in one month. Finally, set the three constraints of hot spot temperature limit, top oil temperature limit and life loss limit, calculate the normal, long-term and short-term current carrying capacity of oil immersed transformer according to the predicted power load data and real-time ambient temperature, and draw a conclusion: hot spot temperature is the limiting factor affecting the long-term and short-term load capacity of transformer, and the long-term current carrying capacity of this transformer is 1.61 times that of the original, The short-term current carrying capacity is 1.64 times of the original, which provides a certain reference for the power dispatching department.","PeriodicalId":413409,"journal":{"name":"2022 IEEE 6th Conference on Energy Internet and Energy System Integration (EI2)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130845952","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}