{"title":"Non-Technical Losses Detection in Electric Distribution Systems Using BERT and GAN","authors":"Jia-He Lim, Yu-Wen Chen, C. Chu","doi":"10.1109/IAS54023.2022.9939802","DOIUrl":"https://doi.org/10.1109/IAS54023.2022.9939802","url":null,"abstract":"Non-technical losses have caused lots of revenue loss in many electric utility companies around the world. In current practices, manual analysis on collected power consumption data first. Then, on-site inspections are conducted. With recent advances of machine learning techniques, several works have been developed to solve this task in a more effective manner. However, most existing machine learning approaches still require the feature extraction step. Moreover, most current studies overlook the imbalanced dataset from consumer's power meters. This paper proposes a new approach to deal with these problems by integrating two deep machine learning techniques. First, we use Bidirectional Encoder Representations from Transformers (BERT) to remove the feature extraction step. Meanwhile, the generative adversarial network (GAN) is considered to generate fake data to increase the number of the minority class in the imbalanced dataset. The effectiveness of the proposed method has been evaluated on various metrics. Experimental results demonstrated that the proposed method can indeed improve the recall and F1-score significantly.","PeriodicalId":193587,"journal":{"name":"2022 IEEE Industry Applications Society Annual Meeting (IAS)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116281778","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}
Li Wang, Zhi-Hong Huang, C. Tseng, Min-Fang Lee, Ching-Chung Tseng, A. Prokhorov, H. Mokhlis, K. Chua, M. Tripathy
{"title":"A Novel Scheme for Switching Between a Self-excited Induction Generator and a Series Connected Self-excited Synchronous Generator","authors":"Li Wang, Zhi-Hong Huang, C. Tseng, Min-Fang Lee, Ching-Chung Tseng, A. Prokhorov, H. Mokhlis, K. Chua, M. Tripathy","doi":"10.1109/IAS54023.2022.9939871","DOIUrl":"https://doi.org/10.1109/IAS54023.2022.9939871","url":null,"abstract":"This paper proposes a novel switching scheme to operate an autonomous three-phase wound-rotor induction machine (IM) as two self-excited AC generators. The first generator is a self-excited induction generator (SEIG) with short-circuited Y-connected rotor terminals. The second generator is a series connected self-excited synchronous generator (SCSESG) with Y-connected rotor windings in series with its stator windings in different phase sequence. The three-phase IM model is derived to analyze the performance operated as an SEIG or an SCSESG. To validate the proposed IM model switching between an SEIG and an SCSESG under various loading conditions, the simulated steady-state and transient results are compared with the experimental results obtained from a laboratory 1.1-kW wound-rotor IM. It can be concluded from the simulated and experimental results that the proposed model is adequate to simulate the performance of the IM operated as an SEIG or an SCSESG.","PeriodicalId":193587,"journal":{"name":"2022 IEEE Industry Applications Society Annual Meeting (IAS)","volume":"137 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124047233","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}
Balaji Guddanti, Rajarshi Roychowdhury, M. Illindala
{"title":"Evaluation of Modified Global Sensitivity Analysis Techniques for Power System Dynamic Studies","authors":"Balaji Guddanti, Rajarshi Roychowdhury, M. Illindala","doi":"10.1109/IAS54023.2022.9939913","DOIUrl":"https://doi.org/10.1109/IAS54023.2022.9939913","url":null,"abstract":"When conducting detailed dynamic simulations of a power system network, it is advantageous to know the key parameters of the nonlinear models. The power engineers can Tune the dynamic models' response to meet the inverter-based resources interconnection requirements and maintain grid reliability. State-of-the-art sensitivity analysis techniques cannot be directly applied to complex nonlinear dynamic models, for example, second-generation renewable energy system models. Thus, this work focuses on proposing modified global sensitivity analysis techniques that are highly applicable for nonlinear dynamic models in the modern power system network. Additionally, the proposed techniques are evaluated based on their computational efforts. The proposed modified techniques are applied on a utility-scale solar photovoltaic power plant dynamic model to determine the sensitive states and identify the key parameters. Detailed dynamic simulation on a 200-bus synthetic grid network is conducted to verify the identified key parameters using PSS®E.","PeriodicalId":193587,"journal":{"name":"2022 IEEE Industry Applications Society Annual Meeting (IAS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129876394","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}
Hongjun Zhao, Guoqing Li, Fei Wang, Z. Zhen, Zihang Li, Jianan Li, X. Ge, Hui Ma
{"title":"Sand and Dust Storms Monitoring Using FY-4A Satellite Data based on Convolutional LSTM Networks","authors":"Hongjun Zhao, Guoqing Li, Fei Wang, Z. Zhen, Zihang Li, Jianan Li, X. Ge, Hui Ma","doi":"10.1109/IAS54023.2022.9940052","DOIUrl":"https://doi.org/10.1109/IAS54023.2022.9940052","url":null,"abstract":"Improving the sand and dust storms monitoring capability can provide early warning information for sandstorms, and effectively improve the PV power prediction accuracy under sand and dust storms weather. In this paper, a hybrid model dust monitoring method based on a one-dimensional convolutional neural network (CNN) and a long short-term memory (LSTM) network is proposed. Using the normalized difference dust index (NDDI), CNN model, and 1DCNN-LSTM hybrid model, combined with the number four meteorological satellite (FY-4A). The channel scanning imaging radiometer AGRI (Advanced Geostationary Radiation Imager) data is used to monitor and study the sand and dust storms of the Taklimakan Desert in southern Xinjiang. The results show that the NDDI dust index established by images at different times needs to take different thresholds to identify the dust area. There are misidentifications in the coverage area as well as in the desert area. The sand and dust storms monitoring model established based on CNN network and 1DCNN-LSTM network, the accuracy (Accuracy) and loss function (Loss) of training samples and test samples are 99.9% and 1%, respectively, which has strong sand and dust storms monitoring capabilities. In practical applications, the 1DCNN-LSTM model is better than the CNN model in processing the boundary between sand and non-sand dust. In addition, the 1DCNN-LSTM model can also more accurately identify sand and dust storms in the case of a small amount of cloud occlusion area.","PeriodicalId":193587,"journal":{"name":"2022 IEEE Industry Applications Society Annual Meeting (IAS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130400164","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}
Liangzi Li, Keli Li, Kaiqi Sun, Yuanyuan Sun, Zhijie Liu, J. Lou
{"title":"A System-guidance for Power Router Applications in DC Buildings","authors":"Liangzi Li, Keli Li, Kaiqi Sun, Yuanyuan Sun, Zhijie Liu, J. Lou","doi":"10.1109/IAS54023.2022.9939927","DOIUrl":"https://doi.org/10.1109/IAS54023.2022.9939927","url":null,"abstract":"With the global interest in carbon neutrality, the renewable energy generation (REG) industry has developed rapidly in the past few decades. In order to improve the integration efficiency of REG like the photovoltaic (PV) arrays, the direct current (DC) power system is re-adopted after almost 100 years. With more and more demonstrations or business systems under operation, the practical applications on the DC microgrids and the DC transportation systems have proven the feasibility of DC buildings. In DC buildings, power routers are used to regulate the power flow among the power electronic interfaces. However, the existing standards and codes are focused on the high voltage level and extra low voltage level application, the implementation and the operation standard of the power routers in the DC building application have not received too much attention. In this paper, system-level guidance for power router applications in DC buildings is proposed. By the modification of the existing standards and the analysis of the DC building operation, the sizing guidance is proposed to satisfy any possible circumstances. Control recommendations are also provided to match the microgrid standards, including voltage control, power dispatch, and low voltage ride-through.","PeriodicalId":193587,"journal":{"name":"2022 IEEE Industry Applications Society Annual Meeting (IAS)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131727644","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 Regression Model-Based Toolbox for Induced Voltage Prediction on Rail Tracks Due to AC Electromagnetic Interference of Adjacent Power Lines","authors":"Md. Nasmus Sakib Khan Shabbir, Chenyang Wang, Xiaodong Liang, Emerson Adajar","doi":"10.1109/IAS54023.2022.9939715","DOIUrl":"https://doi.org/10.1109/IAS54023.2022.9939715","url":null,"abstract":"AC electromagnetic interference between rail tracks and adjacent power lines causes serious concerns about personnel and railway equipment safety. The existing AC interference analysis method uses the complex computer simulation software to estimate induced voltages on rail tracks, and such simulation becomes especially difficult at the transmission line routing stage when only limited information is available. To overcome this challenge, a novel regression model-based toolbox is developed in this paper to predict induced voltages on rail tracks due to AC interference. To develop this toolbox, the dataset acquisition is a critical step due to very limited research conducted in this area. A dataset is produced in this study using our newly developed AC interference analysis method, where variations of various factors are considered, including the power line's current, the separation distance between power lines and railway, the ballast resistance, and the length of rail tracks. To improve the accuracy, hyperparameters of regression algorithms are optimized by Bayesian optimization. Two models are eventually chosen to predict induced voltages on rail tracks: “Gaussian process regression” with “matern 3/2” kernel function; and a tri-layered “neural network” model with “sigmoid” activation function. The toolbox is accurate and easy-to-use for design engineers working on transmission line routing, and has been currently in use by Manitoba Hydro in Canada.","PeriodicalId":193587,"journal":{"name":"2022 IEEE Industry Applications Society Annual Meeting (IAS)","volume":"163 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126659132","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}
Li Wang, Zhi-Hong Huang, Ching-Chuan Tseng, Min-Fang Lee, Ching-Chung Tseng, Hung-Hsien Ku, C. Hsieh, A. Prokhorov, H. Mokhlis, K. Chua, M. Tripathy
{"title":"Operating Characteristics of a Vanadium Redox Flow Battery-based Energy-storage System","authors":"Li Wang, Zhi-Hong Huang, Ching-Chuan Tseng, Min-Fang Lee, Ching-Chung Tseng, Hung-Hsien Ku, C. Hsieh, A. Prokhorov, H. Mokhlis, K. Chua, M. Tripathy","doi":"10.1109/IAS54023.2022.9939882","DOIUrl":"https://doi.org/10.1109/IAS54023.2022.9939882","url":null,"abstract":"This paper presents comparative experimental measured results and computer simulated outcomes of a vanadium redox flow battery (VRFB)-based energy-storage system (ESS) under different charging and discharging conditions. The experimental platform of the studied VRFB-based ESS includes an experimental VRFB of rated 500 W, a battery monitoring instrument, a programmable DC power supply, a single-phase DC-to-AC power inverter, an AC load, and a power-resistor load. The parameters of the equivalent-circuit model of the studied VRFB are carefully derived according to the obtained experimental measured results. From the comparative measured and simulated results, it shows that the average errors of voltage and power of the studied VRFB-based ESS under various charging and discharging conditions can be as low as 0.5053% and 1.232%, respectively.","PeriodicalId":193587,"journal":{"name":"2022 IEEE Industry Applications Society Annual Meeting (IAS)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121331129","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":"Hybrid Modulation Scheme with Current-Stress Optimization of DAB DC-DC Converter to Enhance Efficiency","authors":"Suman Mandal, A. Shukla, S. Doolla","doi":"10.1109/IAS54023.2022.9939880","DOIUrl":"https://doi.org/10.1109/IAS54023.2022.9939880","url":null,"abstract":"The increasing popularity of power electronic (PE) converters in different applications has led the research work to obtain higher efficiency and power density of the system. The dual active bridge (DAB) converter becomes very important in the domain of DC-DC isolated converters, due to its several advantages. Multiple research articles have studied the operation procedure of DAB converter, and proposed various modulation techniques for the same. Several phase shift modulation techniques have improved the operation of DAB for wide voltage and power range. However, at low power and wide voltage variation of converter, some limitations of those phase sift modulation techniques can be identified such as, low efficiency, hard switching operation, high peak and rms current of transformer, high computational effort etc. Targeting those issues, a hybrid modulation technique is proposed combining single phase shift and variable phase shift modulation techniques. The proposed modulation scheme a) optimizes the transformer peak current at its minimum value for full range of power, b) provides zero voltage switching (ZVS) operation for all operating conditions, c) ensures minimum voltage stress on switches, d) does not use any current sensor for the optimization process and e) operates with simplified control strategy which results low computational efforts. The optimization of peak current is achieved using two different methods, which are differential method and Lagrangian multiplier method. The optimization process is carried out for full range of voltage and power to ensure the ZVS operation for all operating conditions. All the claimed characteristics of the proposed modulation technique are verified through simulation and the experimental results derived from a hardware prototype.","PeriodicalId":193587,"journal":{"name":"2022 IEEE Industry Applications Society Annual Meeting (IAS)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121247863","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 DC-DC converter with input full active bridge and output semi active bridge for bipolar LVDC systems","authors":"Yi-Jhong Chen, Jianjun Ma, Miao Zhu, N. Dai","doi":"10.1109/IAS54023.2022.9940082","DOIUrl":"https://doi.org/10.1109/IAS54023.2022.9940082","url":null,"abstract":"A bipolar topology with multi-mode operation capability is proposed in this paper as an interface DC-DC converter for critical loads in bipolar low voltage direct current (LVDC) systems, which can operate under either bipolar-input mode or monopolar-input mode. The proposed converter consists of two full active bridges (FAB) at the bipolar side and one semi active bridge (SAB) at the load side. Zero voltage switching (ZVS) zone for the two operation modes are inspected to provide reference for parameter selection. With a proper parameter selection, the proposed converter could realize ZVS turn-on of all active switches under both operation modes while remaining an unchanged output power in steady state. The proposed converter and is verified with PLECS simulation.","PeriodicalId":193587,"journal":{"name":"2022 IEEE Industry Applications Society Annual Meeting (IAS)","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116550887","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":"Misalignment Tolerance of Inductive Power Transfer Coupler with Low Loss and High Magnetic Induction Ferromagnetic Materials","authors":"Jinping Kang, Shaoyu Cheng, Yubo Wang, Xueying Zhang, Fuyao Yang, Guorui Xu, H. Eldeeb, Haisen Zhao","doi":"10.1109/IAS54023.2022.9939769","DOIUrl":"https://doi.org/10.1109/IAS54023.2022.9939769","url":null,"abstract":"In an inductive power transfer (IPT) system, various magnetic materials have difference characteristics in enhancing the degree of coupling and misalignment tolerance between the primary and secondary coils. However, the iron losses in ferromagnetic materials may decrease the transfer efficiency of the IPT system significantly. Therefore, in this study, performance and misalignment tolerance of IPT systems with four types of ferromagnetic materials are investigated. Firstly, an equivalent circuit model of the IPT system is established and the variations of system efficiency with different ferromagnetic materials are also revealed. Then, a 3-D finite element analysis (FEA) model of the magnetic coupler is established. In addition, loss test platform is established to obtain the accurate loss coefficients. Finally, the transfer efficiency and magnetic field distributions are both investigated. The results show that the high efficiency and magnetic flux density can be achieved when nanocrystalline core with vertical laminations is used.","PeriodicalId":193587,"journal":{"name":"2022 IEEE Industry Applications Society Annual Meeting (IAS)","volume":"339 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122752575","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}