A. Darudi, Shideh Rezaeifar, Mohammd Hossein Javidi Dasht Bayaz
{"title":"Partial mutual information based algorithm for input variable selection For time series forecasting","authors":"A. Darudi, Shideh Rezaeifar, Mohammd Hossein Javidi Dasht Bayaz","doi":"10.1109/EEEIC-2.2013.6737928","DOIUrl":"https://doi.org/10.1109/EEEIC-2.2013.6737928","url":null,"abstract":"In time series forecasting, it is a crucial step to identify proper set of variables as the inputs to the model. Many input variable selection (IVS) techniques fail to perform suitably due to inherent assumption of linearity or rich redundancy between variables. The motivation behind this research is to propose an input variable selection algorithm which not only can handle nonlinear problems and redundant data, but also is straightforward and easy-to-implement. In the field of information theory, partial mutual information is a reliable measure to evaluate linear/nonlinear dependency and redundancy among variables. In this paper, we propose an IVS algorithm based on partial mutual information. The algorithm is tested on three time series with known dependence attributes. Results confirm credibility of the proposed method to capture linear/non-linear dependence and redundancy between variables.","PeriodicalId":445295,"journal":{"name":"2013 13th International Conference on Environment and Electrical Engineering (EEEIC)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121005596","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":"An efficient home energy management system for automated residential demand response","authors":"Hadis Pourasghar Khomami, M. H. Javidi","doi":"10.1109/EEEIC-2.2013.6737927","DOIUrl":"https://doi.org/10.1109/EEEIC-2.2013.6737927","url":null,"abstract":"Due to the emerging of smart grid, residential consumers have the opportunity to reduce their electricity cost (EC) and peak-to-average ratio (PAR) through scheduling their power consumption. On the other hand, it is obviously impossible to integrate a large scale of renewable energy sources (RES) without extensive participation of the demand side. We are looking for a way to provide the system operators with the capability of increasing the penetration of RES besides maintaining the reliability of the power grid via load management and flexibility in the demand side. The primary aim is to provide consumers with a simple smart controller which can result in EC and PAR reduction with respect to consumer preferences and convenience level. In this paper, first we present a novel architecture of home EMS and automated DR framework for scheduling of various household appliances in a smart home, and then propose a genetic algorithm (GA) based approach to solve this optimization problem. The real-time price (RTP) model in spite of its privileges has the tendency to accumulate a lot of loads at a pretty low electricity price time. Therefore, in this paper we use the combination of RTP with the inclining block rate (IBR) model which has the capability to remarkably decrease the PAR and eliminate rebound peak during low price periods. We present three different case studies with diverse power consumption patterns to evaluate the performance of our approach. The simulation results demonstrate the terrific impact of this method for any household load shape.","PeriodicalId":445295,"journal":{"name":"2013 13th International Conference on Environment and Electrical Engineering (EEEIC)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131536859","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":"Voltage regulation in the douglas area using shunt capacitor banks and controllable shunt reactors","authors":"S. Sithole, N. Mbuli, J. Pretorius","doi":"10.1109/EEEIC-2.2013.6737888","DOIUrl":"https://doi.org/10.1109/EEEIC-2.2013.6737888","url":null,"abstract":"Voltage regulation is one of the critical quality of supply aspects in any power system. Due to this requirement, voltages must almost always be kept within the utilities defined lower and higher limits. Loads that vary substantially between peak and off-peak times can results in voltages exceeding the upper limits when the load is low and exceeding the lower limits when the load is high. Due to these two extremes, the shunt capacitor banks may have to be installed in the case of low voltages, as well as shunt reactors in the case of high voltages. Traditionally, the two different shunt devices should be switchable to avoid worsening either extreme condition. This is however a difficult challenge as the switching activities of capacitor banks and reactors, may result in too many operations of switchgear, failure to switch when required by other parts of the network other than the busbar connected at, hunting activities between switching devices and transformer tap changers which may result in false alarms, tap changer lockouts, and trouble shooting of control equipment. This paper suggests the use of fixed shunt capacitor banks with one optimally placed controllable shunt reactor to regulate voltages in the concerned area of supply.","PeriodicalId":445295,"journal":{"name":"2013 13th International Conference on Environment and Electrical Engineering (EEEIC)","volume":"243 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115604603","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":"Probabilistic analysis on measurement timescale in medium voltage grid","authors":"Y. Xiang, J. Cobben","doi":"10.1109/EEEIC-2.2013.6737882","DOIUrl":"https://doi.org/10.1109/EEEIC-2.2013.6737882","url":null,"abstract":"The paper presents a probabilistic approach to evaluate the errors due to measurement timescale in medium voltage distribution grid. Three common data acquisition methods by measurement devices are shown, and two kinds of measurement errors due to timescale are defined. Based on Gaussian Process, the stochastic characteristics of household loads are discussed, which are important random variables influencing the grid. A probabilistic approach with Monte Carlo method is presented to evaluate the measurement errors due to timescale problem. Finally, a case study on a simplified grid is given.","PeriodicalId":445295,"journal":{"name":"2013 13th International Conference on Environment and Electrical Engineering (EEEIC)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117072952","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":"Bidding behavior analysis of generating companies in Iran's electricity market","authors":"A. Darudi, Navid Yekyai, M. H. J. Bayaz","doi":"10.1109/EEEIC-2.2013.6737929","DOIUrl":"https://doi.org/10.1109/EEEIC-2.2013.6737929","url":null,"abstract":"Modeling and analyzing behavior of market participants is a crucial task towards optimized design and operation of electricity markets. In this paper, we study bidding behavior of generating units in Iran's electricity market using publicly available data such as hourly demand, weighted average price and bids of generator units. Structure of power market in Iran allows each generator to bid its capacity in several steps/blocks. First, this paper analyzes and discusses about the number of steps offered to the market. Due to the nature of Pay As Bid (PAB) markets, we expect that the bidding behaviors of the companies highly depend on the grid's demand; therefore, as the next step, effects of demand value on distribution of bids in off-peak, shoulder and peak hours are investigated. Finally, using bidding data of the generating units, we try to explain why price peaks and load peaks are not coincident in summer days of 2011.","PeriodicalId":445295,"journal":{"name":"2013 13th International Conference on Environment and Electrical Engineering (EEEIC)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125072692","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":"Hardware implementation of grid connected PV system with energy management scheme","authors":"G. Deepak, M. J. B. Reddy, D. K. Mohanta","doi":"10.1109/EEEIC-2.2013.6737930","DOIUrl":"https://doi.org/10.1109/EEEIC-2.2013.6737930","url":null,"abstract":"Photovoltaic (PV) systems are emerging as a prevalent renewable energy source for electricity generation. PV systems utilize photovoltaic cells for converting solar energy to electrical energy. However, the intermittent nature of solar energy limits the applications of PV systems in numerous fields of power engineering. To overcome this limitation, this paper presents a hardware prototype of the grid connected PV system with energy management system using batteries. The battery based energy management system provides a stable and reliable power output from PV system irrespective of the variations in solar energy. The energy management deploys bi-directional DC-DC converter for controlled charging and discharging of batteries. Single phase inverter has been employed for converting DC power output from PV cells to AC power. The grid synchronization control of the inverter has been achieved through TI-MSP430 microcontroller launch pad kit. Various modes of operation of the grid connected PV system are tested using the developed hardware prototype.","PeriodicalId":445295,"journal":{"name":"2013 13th International Conference on Environment and Electrical Engineering (EEEIC)","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122422016","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":"Multifunctional control strategy of Half-Bridge based Railway Power Quality Conditioner for Traction System","authors":"H. J. Kaleybar, S. Farshad, M. Asadi, A. Jalilian","doi":"10.1109/EEEIC-2.2013.6737909","DOIUrl":"https://doi.org/10.1109/EEEIC-2.2013.6737909","url":null,"abstract":"The extension of electrical railway systems causes critical power quality problems in the power grid. This paper presents a kind of Half-Bridge Railway static Power Quality Conditioner (HBRPQC) based on a half-bridge converter which can compensate Negative Sequence Currents (NSC), harmonics and reactive power simultaneously. In this paper, a new multifunctional control strategy based on modified instantaneous reactive power (p-q) theory is proposed to keep the HBRPQC performance efficient and suitable for different kinds of transformers used in Traction Power supply Substation (TPS). Due to the fast dynamic of traction loads, a hysteresis current controller is used to generate pulse signals of HBRPQC switches. Finally, the presented control method is simulated for V/V and Y/Δ11 transformers by Matlab/Simulink software. The simulation results validate the correctness of proposed control method.","PeriodicalId":445295,"journal":{"name":"2013 13th International Conference on Environment and Electrical Engineering (EEEIC)","volume":"158 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116393227","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 simple predictive direct current control for grid side converter of DFIG under ideal and non-ideal supply voltage","authors":"M. E. Zarei, B. Asaei","doi":"10.1109/EEEIC-2.2013.6737922","DOIUrl":"https://doi.org/10.1109/EEEIC-2.2013.6737922","url":null,"abstract":"This paper presents a current control strategy for grid side converter (GSC) of DFIG. In this method, voltage vector sequences are predicted to control the current of this converter in synchronous frame. In this method, the converter voltage sector is confirmed according to the grid voltage phase sector and rectifier or inverter mode of the converter. Four voltage vectors are predicted at each converter voltage sector and each vector is applied two times in a period to have a constant switching frequency and low total harmonic distortion (THD). Under unbalanced and non-sinusoidal grid voltage conditions, without extra controller, the proposed technique injects or absorbs sinusoidal current while the switching frequency is constant. A three phase grid connected converter is used to analyze the behavior of proposed control technique under ideal and non-ideal supply voltage. The simulation is carried out in MATLAB/SIMULINK environment.","PeriodicalId":445295,"journal":{"name":"2013 13th International Conference on Environment and Electrical Engineering (EEEIC)","volume":"233 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133418392","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":"Compensation of discontinuous conduction in single phase grid connected PWM inverters","authors":"A. Futo, I. Varjasi","doi":"10.1109/EEEIC-2.2013.6737895","DOIUrl":"https://doi.org/10.1109/EEEIC-2.2013.6737895","url":null,"abstract":"Nowadays the increasing utilization of renewable energy sources demand power converters capable of delivering high quality energy to the low voltage grid. The traditional dead-time compensation methods handle high-power operating conditions well, but low-power conditions and discontinuous conduction require further investigation. This paper identifies four cases of discontinuous conduction in single phase half bridge inverters, and describes the resulting nonlinearities. Based on these results and on the three cases of continuous conduction, an improved dead time compensation method is shown for single phase PWM inverters. The compensator chooses the actual one from the seven cases, and calculates the corresponding error voltage. The result is used for correction at duty cycle level. The capabilities of the compensator are shown via simulation on a system without a PI current controller, so the results can be easily compared with other existing methods.","PeriodicalId":445295,"journal":{"name":"2013 13th International Conference on Environment and Electrical Engineering (EEEIC)","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126213838","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":"An intelligent alternator control approach for fuel consumption reduction","authors":"Amir Sayahan, B. Asaei","doi":"10.1109/EEEIC-2.2013.6737925","DOIUrl":"https://doi.org/10.1109/EEEIC-2.2013.6737925","url":null,"abstract":"In recent years, it is necessary to improve the energy efficiency and reduce emissions. Hence, energy saving and fuel consumption improvement in conventional vehicles are desired. Intelligent control of alternator grants an opportunity for the mentioned goals. In this paper, electrical system of a conventional vehicle is modeled to understand its behavior more thoroughly. The modeled components are fuel convertor, drive train, battery, alternator, and resistive loads. Then, an intelligent alternator control is proposed for the power system of the vehicle which manages the energy flow through the vehicle power system considering the engine fuel and the alternator efficiency maps. The fuel consumption and exhaust gas pollution have been reduced while maintaining reliability has been investigated and demonstrated through a standard driving cycle in the MATLAB / Simulink environment.","PeriodicalId":445295,"journal":{"name":"2013 13th International Conference on Environment and Electrical Engineering (EEEIC)","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125228340","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}