Timo Bernard, Julian Klaassen, Daniel Wohland, G. vom Bogel
{"title":"Combining several distinct electrical features to enhance nonintrusive load monitoring","authors":"Timo Bernard, Julian Klaassen, Daniel Wohland, G. vom Bogel","doi":"10.1109/ICSGCE.2015.7454285","DOIUrl":"https://doi.org/10.1109/ICSGCE.2015.7454285","url":null,"abstract":"Smart meters are state of the art for electricity measurement in domestic and commercial buildings. So far they are only able to track the overall electricity consumption, though appliance specific feedback can lead to substantial higher energy savings. One promising option to reach appliance specific consumption information is nonintrusive load monitoring (NILM), in which this information is gained by disaggregating the overall load profile from a single-point measurement. To improve the accuracy of NILM, in this paper we investigate several distinct electrical features and combine them in an unsupervised learning algorithm. Our algorithm evaluation shows promising results for this method.","PeriodicalId":134414,"journal":{"name":"2015 International Conference on Smart Grid and Clean Energy Technologies (ICSGCE)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127881573","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":"Construction of regional grid intelligent alarm system","authors":"Xue Yang, Shiming Sun","doi":"10.1109/ICSGCE.2015.7454286","DOIUrl":"https://doi.org/10.1109/ICSGCE.2015.7454286","url":null,"abstract":"The main alarm information of the grid includes the normal operation message, the accidents information and the warning message. In order to process the alarm information separately and offer the initiative treatment options for dispatchers, an intelligent alarm system for regional intelligent grid is constructed in the paper. Alarm signal classification and expert reasoning were carried out based on the signals' importance in the system. With fuzzy matching method the alarm signals were associated with the alarm knowledge base automatically. By single event reasoning and multi-event reasoning methods, alarm information is reasoned as well as judged according to the logic of knowledge base in the intelligent alarm system.","PeriodicalId":134414,"journal":{"name":"2015 International Conference on Smart Grid and Clean Energy Technologies (ICSGCE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131265435","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":"Modelling of domestic load demand in the presence of microgrid with wind and photovoltaic resources","authors":"Yan Ge, K. Qian, Jiachang Dai, Chengke Zhou","doi":"10.1109/ICSGCE.2015.7454293","DOIUrl":"https://doi.org/10.1109/ICSGCE.2015.7454293","url":null,"abstract":"Accurate domestic (residential) load modelling is essential for load forecasting, simulation, planning and control of power distribution networks. This paper presents a novel method of modelling hourly domestic household's load demand taking account of the impact of microgrid. Wind and solar power generation are modeled in details and included in the load demand model. Meanwhile, multiple Gaussian distributions are used to reduce and simplify the data requirements for modelling. By discovering the relationship between domestic load profile characteristics and Gaussian distribution parameter, the model only requires very limited number of parameters to generate a household's hourly electricity load profile. The simplicity of this method made it possible to generate the hourly load profile without the detailed statistical data from the household required by other published methods. The models are therefore especially useful for the areas that smart meters are not yet deployed. Simulation results of an example domestic household show that the proposed method achieves a satisfying load modeling results.","PeriodicalId":134414,"journal":{"name":"2015 International Conference on Smart Grid and Clean Energy Technologies (ICSGCE)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132438262","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}
Shili Lin, Wenji Song, Yongzhen Chen, Lingyan Luo, Z. Feng
{"title":"Study on the model of elevator regeneration energy and its energy storage control method","authors":"Shili Lin, Wenji Song, Yongzhen Chen, Lingyan Luo, Z. Feng","doi":"10.1109/ICSGCE.2015.7454282","DOIUrl":"https://doi.org/10.1109/ICSGCE.2015.7454282","url":null,"abstract":"The battery energy storage system (BESS) insisting of Li4Ti5O12 (LTO)-based batteries is put forward in this paper in order to suppress the voltage fluctuation of the DC grid of elevator caused by regeneration energy of the traction machine. Based on the mathematical model of the regenerative power set up in MatLab/Simulink, the capacity and control method of BESS is designed to effectively achieve the absorption and release of the regeneration energy. Moreover, a dynamic control strategy is researched to improve its applicability in actual system. The simulation results show that BESS could well restrain the grid voltage within the safety working range and availably reduce the total energy consumption of the elevator.","PeriodicalId":134414,"journal":{"name":"2015 International Conference on Smart Grid and Clean Energy Technologies (ICSGCE)","volume":"134 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131795525","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}
Muhammad Muneeb Ur Rehman, Muhammad Adeel Pasha, N. Hassan
{"title":"Clean consumer energy technologies in developing countries: A case study of energy efficient lights in Pakistan","authors":"Muhammad Muneeb Ur Rehman, Muhammad Adeel Pasha, N. Hassan","doi":"10.1109/ICSGCE.2015.7454274","DOIUrl":"https://doi.org/10.1109/ICSGCE.2015.7454274","url":null,"abstract":"An increasing shift from incandescent lamps to compact fluorescent lamps (CFLs), followed by light emitting diode (LED) lamps is taking place all over the world due to higher energy conservation and cleaner energy aspects of such solutions. Energy efficient lamps use electronic components and provide higher luminous efficacy. However, the power quality of such products that actually determines their true energy conservation potential is of great concern in the developing countries where energy efficient lighting markets are operating without significant regulatory oversight. In this work, we performed a technical audit and comparative analysis of several lighting solutions (local and international) available in Pakistan against the vendor claims and international standards. The results show that the energy-efficient lights of higher power rating (>25W) meet the vendor claims and international standards in the power characteristics while lighting solutions of lower power rating (<;25W) suffer from high degree of harmonic distortions that result in severe degradation of the power quality and significant deviation from the vendor claims as well as international standards. Based on our study, we then provide some recommendations and guidelines in order to build consumer confidence in cleaner energy products in developing countries.","PeriodicalId":134414,"journal":{"name":"2015 International Conference on Smart Grid and Clean Energy Technologies (ICSGCE)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114719470","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":"Design and implementation of signal quality simulator for substation auxiliary system","authors":"Zhengwei Chang, Tianhao Xu, Shiqiang Jing","doi":"10.1109/ICSGCE.2015.7454278","DOIUrl":"https://doi.org/10.1109/ICSGCE.2015.7454278","url":null,"abstract":"The signal quality of auxiliary system is very important for substation to assure operation in safe conditions, but the external environment like electromagnetic interference, high or low temperature, and equipment aging will directly influence the video signal quality transferred by the auxiliary system, which makes a high demand for the cracking resistance of the auxiliary system device. This paper designs a signal quality simulator for substation auxiliary system and simulates common damage situations in the substation to reproduce the real damage situations in the laboratory environment. The results show that this simulator can provide a research platform to test the capability of anti-interference and data recovery of the auxiliary system and so on.","PeriodicalId":134414,"journal":{"name":"2015 International Conference on Smart Grid and Clean Energy Technologies (ICSGCE)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125733347","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 seismic assessment algorithm for smart grid safety monitoring","authors":"Ching-Ya Tseng, Xiang-Yao Zheng, Cheng-Yue Liu, Lin-Kuei Su, Liping Fan, Joe-Air Jiang","doi":"10.1109/ICSGCE.2015.7454298","DOIUrl":"https://doi.org/10.1109/ICSGCE.2015.7454298","url":null,"abstract":"Among natural disasters, earthquakes are a major factor that damages transmission lines and power towers, but the impacts of earthquakes on transmission towers are less discussed. For many countries, earthquakes often cause power outages. Traditionally, the safety of extra-high voltage (EHV) transmission systems is inspected by the staff of power companies. Due to high labor costs and time consuming patrols, system anomalies are difficult to be identified immediately. Therefore, this study develops a seismic assessment algorithm for electrical grid safety monitoring with the wireless sensing technology to assess seismic hazard for the EHV transmission system. In the monitoring system, the environment sensing data can be transmitted in real-time by a wireless network. And the intensity data can be analyzed by the algorithm immediately after an earthquake occurs. Specifically, peak ground acceleration (PGA) is adopted as the seismic intensity parameter, and effective peak acceleration (EPA) is a reference parameter used to evaluate towers seismic hazard. Based on the simulation and verification results, the accuracy of the proposed seismic intensity algorithm is high, and the calculation speed is fast. Thus, the purpose of early warning can be achieved by using the proposed algorithm.","PeriodicalId":134414,"journal":{"name":"2015 International Conference on Smart Grid and Clean Energy Technologies (ICSGCE)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123449290","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":"Application of harmony search method for UPFC location for enhancing power system security","authors":"A. Laifa","doi":"10.1109/ICSGCE.2015.7454288","DOIUrl":"https://doi.org/10.1109/ICSGCE.2015.7454288","url":null,"abstract":"This article proposes the use of an improved harmony search algorithm (IHSA) to find out the optimal location and parameter setting of unified power flow controller (UPFC) to improve system security under single line contingencies through eliminating or minimizing the overloaded lines and the violations of buses voltage limits. A contingency analysis is initially described to identify the most severe line outage contingencies, regarding the overloaded lines and voltage limit violations as index of severity. Then, the proposed algorithm is applied in order to find the optimal location and parameter setting of UPFC under the determined contingency scenario. Through a case study conducted using an IEEE 14-bus system, the obtained results show the proposed technique has good features and that the proposed algorithm is an effective and practical method for the allocation of UPFCs in large power systems. The installation of the UPFC at the optimal place determined by the proposed approach enhance significantly the security of power system by eliminating or minimizing the number of overloaded lines and the bus voltage limit violations.","PeriodicalId":134414,"journal":{"name":"2015 International Conference on Smart Grid and Clean Energy Technologies (ICSGCE)","volume":"120 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122673522","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":"Current distortion around grid zero-volt crossing and open-loop power factor in flyback AC module with a pseudo-DC link","authors":"Edwin Fonkwe, J. Kirtley","doi":"10.1109/ICSGCE.2015.7454266","DOIUrl":"https://doi.org/10.1109/ICSGCE.2015.7454266","url":null,"abstract":"AC modules or micro-inverters (MIC) have increasing importance in photovoltaic (PV) systems. This paper examines two issues with the flyback micro-inverter having a current-unfolding module or pseudo-dc link (FMICpseudo-dc). In one part, a theoretical analysis is proposed to explain the distortion of the grid-injected current around the grid voltage zero-crossings. It is argued that some distortion is inevitable. It is also shown that using a synchronous rectifier does not eliminate the zero-crossing distortion. However, it allows for reactive power injection. In another part an equivalent circuit and mathematical analysis are developed to predict the open loop displacement power factor of the FMICpseudo-dc operating in discontinuous conduction mode (DCM). It is shown that the power factor depends essentially on capacitor filter design while the inductor filter has little effect. To support the theoretical analysis, simulation and experimental results are provided for a digitally-controlled prototype.","PeriodicalId":134414,"journal":{"name":"2015 International Conference on Smart Grid and Clean Energy Technologies (ICSGCE)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132963303","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":"Design of a mean filter algorithm for phase difference measurement based on Fourier transform","authors":"Gen Su, Qi Huang, Huan Liu, Xinbao Wu","doi":"10.1109/ICSGCE.2015.7454281","DOIUrl":"https://doi.org/10.1109/ICSGCE.2015.7454281","url":null,"abstract":"Because of non-coherent sampling, Fourier transform when used for the measurement of phase difference is insufficient in terms of the accuracy and real-time. This paper starts with the analysis of the relationship among the phase difference error, the frequency skew and the true phase difference. Then a mean filter algorithm, which can eliminate the phase difference error as far as possible by taking advantage of the symmetry of the function, is proposed. Comparing with traditional Fourier transform based phase difference measurement algorithm, the proposed algorithm can filter out the error well, improving the accuracy of phase difference measurement.","PeriodicalId":134414,"journal":{"name":"2015 International Conference on Smart Grid and Clean Energy Technologies (ICSGCE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130522011","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}