{"title":"Machine Learning Based One-Terminal Fault Areas Detection in HVDC Transmission System","authors":"Mou-Jie Chen, Shen Lan, Duan-Yu Chen","doi":"10.1109/ICPESYS.2018.8626976","DOIUrl":"https://doi.org/10.1109/ICPESYS.2018.8626976","url":null,"abstract":"Due to low sensitivity in existing High-Voltage Direct Current (HVDC) fault detection methods and difficulty in identifying high-resistance grounding faults, this paper presents two signal-terminal HVDC transmission system fault detection methods based on machine learning. The waveform of the fault voltage collected by the rectifier side detection device is directly used as the input data of K-Nearest Neighbor (KNN) and Support Vector Machine (SVM), eliminating the cumbersome process of fault signal processing. Training is performed in various fault areas and fault types. Then fault areas will be detected by the trained KNN and SVM models. A ± 500 kv HVDC transmission line model was built by electromagnetic transient simulation software PSCAD/EMTDC to simulate and compare different fault areas and fault types. Testing results show that the proposed method can reliably and accurately detect faults with a resistance up to $1000 Omega$.","PeriodicalId":188086,"journal":{"name":"2018 8th International Conference on Power and Energy Systems (ICPES)","volume":"348 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116317457","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}
Zou Qi, Qian Junjie, You Dahai, XU Heng, L. Hengwei, Zhao Hongsheng
{"title":"Risk Assessment for Transmission Network Planning Scheme based on Conditional Value-at-Risk","authors":"Zou Qi, Qian Junjie, You Dahai, XU Heng, L. Hengwei, Zhao Hongsheng","doi":"10.1109/ICPESYS.2018.8626970","DOIUrl":"https://doi.org/10.1109/ICPESYS.2018.8626970","url":null,"abstract":"Power supply reliability is an important indicator for the transmission network planning department and the operation department. A large number of new energy access has brought more and more uncertainties to the power grid, which have a great impact on the power supply reliability of the transmission network. Therefore, it is particularly necessary to evaluate the power supply reliability after the transmission network planning scheme is formed. The traditional determinacy evaluation methods are becoming more and more difficult to meet the requirements of power supply reliability. Traditional risk assessment methods considering uncertain factors also have some limitations. This paper applies the Conditional Value-at-Risk (CvaR) method which is used in financial risk management to the risk assessment of the transmission network planning. The concept of Conditional Value-at-Risk of Energy Not Supplied (CvarENS) is put forward, which will be used as the risk indicator to evaluate the risk of the power supply capacity of a given transmission network planning scheme. Compared with traditional evaluation methods, CvarENS can effectively evaluate the power supply risk of a planning scheme from different levels by adjusting the confidence level. So we can control the risk of power supply capability in transmission network planning, the limitation of traditional risk assessment method is solved. Finally, the validity of the proposed method is verified by a case.","PeriodicalId":188086,"journal":{"name":"2018 8th International Conference on Power and Energy Systems (ICPES)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127940563","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":"Power Management of an Oscillating Water Column Wave Energy Converter with Battery/Supercapacitor Hybrid Energy Storage","authors":"G. Rajapakse, S. Jayasinghe, A. Fleming","doi":"10.1109/ICPESYS.2018.8626942","DOIUrl":"https://doi.org/10.1109/ICPESYS.2018.8626942","url":null,"abstract":"This paper focuses on developing a power management system (PMS) for a grid connected oscillating water column (OWC) wave energy converter with a battery/supercapacitor hybrid energy storage system. The main objective of the PMS is to transfer large power pulses present in the input to the energy storage elements and thereby maintain smooth power delivery to the grid. In addition, maintaining state of charge (SOC) of the battery and supercapacitor within safe limits and ensuring sufficient reserves are other objectives of the PMS. In the proposed PMS, power sharing between energy storage elements is determined based on the deviation of the supercapacitor SOC from the mid-point and its rate of change. Moreover, the power commitment to the grid is adjusted based on the deviation of battery SOC from the mid-point and its rate of change. Successful operation of the proposed PMS is verified using MATLAB/Simulink simulations. Apart from that, the variable speed operation of the turbine is also simulated to observe its effect on the supercapacitor sizing. Simulation results show that the variable speed operation help reduce required capacity of the supercapacitor.","PeriodicalId":188086,"journal":{"name":"2018 8th International Conference on Power and Energy Systems (ICPES)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132434969","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":"Importance Investigation of Load Models Consideration in Stand-Alone Voltage Regulators Placement in Distribution Systems","authors":"M. Attar, Omid Homaee, S. Repo, J. Rekola","doi":"10.1109/ICPESYS.2018.8626919","DOIUrl":"https://doi.org/10.1109/ICPESYS.2018.8626919","url":null,"abstract":"Main goal of this paper is to demonstrate the importance of load models consideration in stand-alone voltage regulators (VRs) placement problem in distribution systems. Loads are modeled by well-known ZIP model. The question is whether the load type of customers influences the number, rating, and location of voltage regulators in a VRs placement problem. The Genetic algorithm (GA) has been used for maximization of the resulted net benefit of VR placement. Total energy losses reduction benefit, cost of voltage regulators and total maintenances costs are considered in the calculation of net profit. Numerical studies have been done on a 70-bus medium voltage distribution system. Two scenarios with different combinations of ZIP model are studied. Results show the importance and effects of load model consideration in the placement of locally controlled voltage regulators.","PeriodicalId":188086,"journal":{"name":"2018 8th International Conference on Power and Energy Systems (ICPES)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122120576","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}
C. Thilakarathne, Lasantha Gunaruwan Meegahapola, N. Fernando
{"title":"A Modified Lyapunov Exponent based Approach for Real-Time Voltage Stability Assessment Using PMUs","authors":"C. Thilakarathne, Lasantha Gunaruwan Meegahapola, N. Fernando","doi":"10.1109/ICPESYS.2018.8626965","DOIUrl":"https://doi.org/10.1109/ICPESYS.2018.8626965","url":null,"abstract":"Real-time voltage stability assessment is a key requisite in modern power networks equipped with renewable distributed generation sources and complex loads. Synchrophasor technology has become a prominent WAMS technology and has gained increasing popularity due to limitations in conventional SCADA systems. This study discusses the end to end process of real-time voltage stability assessment by using a PMU network. Evaluation of largest Lyapunov exponent is identified as an efficient method of determining the real-time stability by performing several dynamic test cases.","PeriodicalId":188086,"journal":{"name":"2018 8th International Conference on Power and Energy Systems (ICPES)","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127310811","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}
G. Konstantinou, H. Wickramasinghe, C. Townsend, S. Ceballos, J. Pou
{"title":"Estimation Methods and Sensor Reduction in Modular Multilevel Converters: A Review","authors":"G. Konstantinou, H. Wickramasinghe, C. Townsend, S. Ceballos, J. Pou","doi":"10.1109/ICPESYS.2018.8626987","DOIUrl":"https://doi.org/10.1109/ICPESYS.2018.8626987","url":null,"abstract":"The circuit configuration of the modular multilevel converter (MMC) requires a large number of current and voltage measurements as well as communications within the converter arms and between the arm controllers and the main control circuit. In order to reduce circuit complexity and hardware requirements with their associated cost, while adding an additional level of reliability to the operation of the MMC, a number of methods have been proposed for the estimation / observation of the various internal electrical variables or parameters of the MMC. These include estimations for sub-module capacitor voltages, dc-link voltages, arm currents or total arm energy. Such methods aim to eliminate or reduce the sensors in the circuit, reduce communication requirements or both. This paper provides an overview and classification of the different estimation/observation methods for MMCs currently proposed in the literature.","PeriodicalId":188086,"journal":{"name":"2018 8th International Conference on Power and Energy Systems (ICPES)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130806133","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":"Rapid Prototyping of High Performance FPGA Controller for an Induction Motor Drive","authors":"M. J. Sumam, S. G.","doi":"10.1109/ICPESYS.2018.8626891","DOIUrl":"https://doi.org/10.1109/ICPESYS.2018.8626891","url":null,"abstract":"This paper describes rapid development technique of prototype non-volatile FPGA space vector pulse width modulated digital controller for a 3-level inverter. Control algorithm is first realized using simulink blocks of matlab. HDL coder converts simulink model to fine and synthesizable hardware description language. Bit stream corresponding to the code executed to flash memory of FPGA. The developed prototype FPGA digital controller is validated on a 3-level inverter that drives three-phase induction motor. The scheme is also verified with the DSP processor based dSPACE controller and compared its performance with that of developed controller. Excellent harmonic performance with very low total harmonic distortion and high spectral purity is observed for developed controller. This development technique enables engineers to construct, simulate and build advanced schemes within small duration of time.","PeriodicalId":188086,"journal":{"name":"2018 8th International Conference on Power and Energy Systems (ICPES)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115859316","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}
Shixiang Lu, Haoran Jiang, Guoying Lin, Xiaofeng Feng, Yang Li
{"title":"Research on Creating Multi-Attribute Power Consumption Behavior Portraits for Massive Users","authors":"Shixiang Lu, Haoran Jiang, Guoying Lin, Xiaofeng Feng, Yang Li","doi":"10.1109/ICPESYS.2018.8626971","DOIUrl":"https://doi.org/10.1109/ICPESYS.2018.8626971","url":null,"abstract":"With the gradual opening of electricity sales markets in China and continuous development of integrated energy systems, problems such as diversified and improper user energy consumption modes are becoming more prominent, and user behavior analyses under market environments are apparently insufficient. Multi-attribute power consumption behavior portraits including user characteristics, pattern, group character and individuality should be established to provide a theoretical basis for intelligent power consumption technologies based on coordinated “source-network-load” interactions. In this paper, based on massive user data from various industries, a pattern of user behavior is extracted from three perspectives: temperature sensitivity, electricity price sensitivity and power consumption stationarity. Characteristic indexes are created and quantified for comprehensive evaluation. User power consumption behavior tags are created. Finally, based on a fuzzy c-means (FCM) clustering algorithm, a multi-attribute user power consumption behavior portrait with quantified, classified and combined tags is created.","PeriodicalId":188086,"journal":{"name":"2018 8th International Conference on Power and Energy Systems (ICPES)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121355486","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}
Wubin Wang, W. Liu, W. Yao, L. Du, Guo-zhu Chen, Zheng-yu Lu
{"title":"LLC Resonant Converter With Topology Morphing Rectifier for Wide Output Voltage Range Application","authors":"Wubin Wang, W. Liu, W. Yao, L. Du, Guo-zhu Chen, Zheng-yu Lu","doi":"10.1109/ICPESYS.2018.8626928","DOIUrl":"https://doi.org/10.1109/ICPESYS.2018.8626928","url":null,"abstract":"LLC is one of the most popular DC/DC converters in electric vehicle chargers, however, the change of state of charge requires output voltage range as wider as nearly four times between the upper and lower limits, and always forces the switching frequency to swing outside the preference region. Based on LLC resonant converter, a novel topology morphing rectifier, which can be operated either as full bridge rectifier or as voltage doubler rectifier, is proposed in this paper. This rectifier offers a cost and controllability competitive alternate for wide output voltage range applications. The average efficiency of prototype converter was measured to be more than 95% at a peak power of 0.5 kW, and furthermore the output voltage from 50V to 200V verified the concept of topology morphing.","PeriodicalId":188086,"journal":{"name":"2018 8th International Conference on Power and Energy Systems (ICPES)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132693376","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":"Implementation of a DC Micro-grid for House Hold Applications","authors":"I. V, B. Vardhan, A. G, R. R., S. Banumathi","doi":"10.1109/ICPESYS.2018.8626889","DOIUrl":"https://doi.org/10.1109/ICPESYS.2018.8626889","url":null,"abstract":"The energy demand around the globe is raising drastically due to changes in-terms of technology and industrial growth around the world. Also, due to the conventional power generation, pollution is rising. Hence there is a need of clean and reusable power generation of power, so the best solution for this is renewable energy sources. Battery management system is done by using the proposed algorithm, which will ensure power balance in the system. Converters are used to interconnect the solar and battery to DC bus link. To control the battery, state of charge and current direction of battery are considered. The sizing of the system and design of the system is analyzed in this work. And a 250W power rating system is designed according to the application need, according to the load profile and a battery management is proposed to control the battery charging and discharging.","PeriodicalId":188086,"journal":{"name":"2018 8th International Conference on Power and Energy Systems (ICPES)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116999811","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}