2012 10th International Power & Energy Conference (IPEC)最新文献

{"title":"Shunt capacitor renewal planning through cost leveling strategy using condition age model","authors":"Yuta Tanaka, Ken Suzuki, S. Iwamoto","doi":"10.1109/ASSCC.2012.6523275","DOIUrl":"https://doi.org/10.1109/ASSCC.2012.6523275","url":null,"abstract":"Past high economic growth in Japan sharply increased power demands year after year. Japanese utilities therefore installed shunt capacitors (SCs) to help voltage profiles and stability meet predicted demands, but some aging SCs will soon need to be replaced. Recent large-scale introduction of Photo Voltaic (PV) systems may lead to voltage stability problems, and there are SC renewal planning problem. This paper addresses the issue of SC replacement with other voltage control equipment. In addition, economic evaluation techniques have caught the interest of power system asset managers. We propose a new fundamental renewal planning method with renewal period cost leveling using the condition age model. Simulations of the IEEJ 30-machine 115-bus system confirm the validity of the proposed method.","PeriodicalId":341348,"journal":{"name":"2012 10th International Power & Energy Conference (IPEC)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127854381","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":"NAS battery system design and allocation for improvement of transient stability ATC","authors":"Yujiro Hiraki, T. Hiraiwa, S. Iwamoto","doi":"10.1109/ASSCC.2012.6523262","DOIUrl":"https://doi.org/10.1109/ASSCC.2012.6523262","url":null,"abstract":"The electric power system has become larger and more complex in recent years, making transient stability a significant problem. Against this background, available transfer capability (ATC) has attracted increased attention. ATC refers to critical transmission power that can be added to the current power flow, and ATC can be used as a numeric index of stability. In this paper, tie-line transient stability is used as an index of transient stability improvement. We propose a method for using NAS battery systems to improve transient stability, where output is determined by H-infinity control theory. Transient stability of the proposed method is verified on the IEEJ EAST 10-machine 47bus system model.","PeriodicalId":341348,"journal":{"name":"2012 10th International Power & Energy Conference (IPEC)","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134287455","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":"Hydropower energy recovery (HyPER) from water-flow systems in Vietnam","authors":"N. Prasad, S. Ranade, Huynh Thai Hoang, N. Phuc","doi":"10.1109/ASSCC.2012.6523245","DOIUrl":"https://doi.org/10.1109/ASSCC.2012.6523245","url":null,"abstract":"In this paper we focus on two types of hydropower sources that offer the greatest potential for harvesting or scavenging the unused energy, namely, energy from urban water treatment and water supply systems, and energy from freeflowing waterways where there is existing infrastructure. The continuous flow of water in urban wastewater treatment and water supply systems provides an uninterrupted source for energy recovery. Large water towers and tanks provide sufficient pressure-head to operate generators to produce electricity. Sewage water treatment facilities continuously produce disinfected effluent that is discharged in to natural water streams. Where there are existing infrastructures such as in irrigation canals and other waterways, there are strong possibilities for harvesting the unused kinetic and potential energy. This can vastly improve the electric power infrastructure and provide greater reliability of electric power service to the society.","PeriodicalId":341348,"journal":{"name":"2012 10th International Power & Energy Conference (IPEC)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124335842","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":"Configurable data exchange tool design based on tagged data structure","authors":"Wang Gao-qin, Xu Jun, Shao Ping","doi":"10.1109/ASSCC.2012.6523284","DOIUrl":"https://doi.org/10.1109/ASSCC.2012.6523284","url":null,"abstract":"Nowadays, more and more information system used in operation of power grid, data exchange between these systems are necessary for information sharing. Due to different data structure, special data interfaces are usually programmed for data exchange between specified systems. Along with the extent ion of systems and additional data exchange demand, the data interface should be modified all the time. For the flexible data exchange between information systems used in power grid, this paper designs a configurable data exchange tool based on tagged data structure, which allows data between different systems exchanged flexibly by configuration of e file parameter and data exchanged in the file.","PeriodicalId":341348,"journal":{"name":"2012 10th International Power & Energy Conference (IPEC)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124256249","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 OPF using linear fuzzy relation","authors":"I. S. Arneja, B. Venkatesh","doi":"10.1109/ASSCC.2012.6523336","DOIUrl":"https://doi.org/10.1109/ASSCC.2012.6523336","url":null,"abstract":"Optimal Power Flow (OPF) is a very important tool for planning and analysis of power systems. In the recent times, uncertain renewable energy is being integrated into power systems in a large scale. Appropriate modeling of renewables in OPF requires using stochastic models. Using stochastic models of renewables in OPF is numerically and algorithmically challenging due to the complexity of stochastic models and nonlinear nature of bus power balance equations. Hitherto, Monte Carlo Simulation technique and Cumulant technique have been proposed, but they are not computationally viable for large systems. In this paper, we propose the use of linear fuzzy relation technique to relate stochastic models of dependent variables of OPF formulation in terms of control variables that include power output of renewables. This fuzzy relation uses Hessian matrix of the LaGrangian of the OPF formulation at optimal solution point. The method is tested on a 6-bus system and results are reported. One can intuitively see that this method can be easily extended to larger systems.","PeriodicalId":341348,"journal":{"name":"2012 10th International Power & Energy Conference (IPEC)","volume":"212 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132238403","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":"Recognition and simulation of electromagnetic transients in power systems of Southern Vietnam","authors":"Huu-Phuc Nguyen, N. Nguyen, Huy Ann Quyen","doi":"10.1109/ASSCC.2012.6523328","DOIUrl":"https://doi.org/10.1109/ASSCC.2012.6523328","url":null,"abstract":"This paper presents a research of electromagnetic transients in power systems based on the three issues: identification of voltage transient disturbances, analysis of power system transient, and modeling of distributed-parameter transmission lines. The first issue includes (a) recognizing the presence of power quality disturbances in supply voltage and (b) classifying any existing deviations from a particular type. Various techniques using artificial neural networks and Fuzzy associative memories, Neuro-Fuzzy systems based on Wavelet transform are used to identify power quality disturbances. The second issue is to analyze the power system transients using the wavelets technique as opposed to the trapezoidal rule method. A novel developed algorithm has the following properties: 1) it is time-domain working, so that circuit nonlinearity can be handled and numerical accuracy can be well controlled, unlike the frequency-domain method where numerical error may become uncontrollable during the inverse Laplace transform; 2) the wavelets property of localization in both time and frequency domains makes a uniform approximation possible, which is generally not achieved in time-stepping methods. The last issue is to model a transmission line based on passive network synthesis for representing the nonlinear frequency dependence of the characteristic impedance matrix function. The synthesized passive network of interconnected RLC elements preserves at any frequency the inherent stability property of this matrix function for any power transmission circuits. The network parameters are identified using the constrained optimization by which the synthesized network response is matched with the actual response derived from the characteristic impedance matrix. With the trapezoidal rule of numerical integration applied to individual elements of the synthesized network, discrete time-domain recursive sequences are derived, and then included in the overall transmission circuit model. The network synthesis procedure developed is applied to a representative transmission line, and comparative studies indicate high accuracy being achieved. The research is then applied and validated to a southern of Vietnam power system in study.","PeriodicalId":341348,"journal":{"name":"2012 10th International Power & Energy Conference (IPEC)","volume":"28 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132508140","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 bipolar gain bridgeless set-up AC/DC converter with power factor correction","authors":"Qiang Chen, Jianping Xu, Zhangyong Chen, Guohua Zhou","doi":"10.1109/ASSCC.2012.6523242","DOIUrl":"https://doi.org/10.1109/ASSCC.2012.6523242","url":null,"abstract":"Bipolar gain step-up converter can realize dc output voltage regulation no matter the input voltage is positive or negative. Therefore, bipolar gain step-up converter can be used as bridgeless PFC converter, without using the front-end bridge rectifier. In this paper, a bipolar gain step-up AC/DC converter operating in discontinuous conduction mode (DCM) as bridgeless PFC converter is introduced. Its operating principle in DCM is illustrated, and its steady-state characteristic is analyzed. It is found that the turn-on loss of the switch and the reverse-recovery losses of the diodes are reduced. Furthermore, the voltage gain of this converter is similar to that of conventional boost converter in DCM. Finally, experimental results are provided with a 50W/200V prototype for line voltage of 85~135Vrms to evaluate the performance of the DCM bridgeless PFC converter.","PeriodicalId":341348,"journal":{"name":"2012 10th International Power & Energy Conference (IPEC)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133240566","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":"Triangular approximate distribution model of wind electric generators","authors":"YU Peng, B. Venkatesh","doi":"10.1109/ASSCC.2012.6523255","DOIUrl":"https://doi.org/10.1109/ASSCC.2012.6523255","url":null,"abstract":"Evolving power systems are facing diverse supply mixes and increasing addition of renewable resources, like wind power. Due to stochastic feature of wind, output of wind electric generators (WEG) has uncertainties. These uncertainties bring risks into daily power system operations. Flexible and accurate computational tools are increasingly needed to handle the uncertainties for generation planning and electricity marketing in a short term time duration. A triangular approximate distribution (TAD) is discussed in this paper to stochastically model real power output of WEGs. The TAD model very closely represents the normal distribution function of forecasted wind power to capture stochastic information of WEGs' output forecasts. The cumulative probability function of unavailability of wind power can be calculated using the TAD model and further to compute expected energy not served, which quantifies the risks caused by wind power. The effects of standard deviation are studied.","PeriodicalId":341348,"journal":{"name":"2012 10th International Power & Energy Conference (IPEC)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133561515","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":"Distributed generation interface using indirect matrix converter in boost mode with controllable grid side reactive power","authors":"Xiong Liu, Peng Wang, P. Loh, F. Blaabjerg","doi":"10.1109/ASSCC.2012.6523239","DOIUrl":"https://doi.org/10.1109/ASSCC.2012.6523239","url":null,"abstract":"Indirect matrix converter (IMC) using two stages configuration is topologically more flexible than 3×3 direct matrix converter (DMC). For grid integration of ac type distributed generators, the ac/ac converters need voltage boost function, which can't be achieved by traditional IMC due to its limited input-to-output voltage transfer gain 0.866. Alternatively, reverse power flow operation of IMC can be implemented to meet voltage boost requirement for distributed generation interface. Intuitively, only the generator side power needs to be controlled, since the power will be spontaneously transferred to the grid side due to the lack of energy storage in IMC. However, open-loop operation of grid side (current source side) converter will lead to uncontrollable grid side reactive power. This paper proposes control schemes of IMC with controllable grid side reactive power by means of controlling both the generator and grid side currents coordinately with properly designed control loop. Simulation results are provided to validate the effectiveness of the control schemes for the proposed matrix converter.","PeriodicalId":341348,"journal":{"name":"2012 10th International Power & Energy Conference (IPEC)","volume":"232 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114750300","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 common LV switchboard to comply with IEC and UL standards","authors":"Manan Deb, Tuhina Singh","doi":"10.1109/ASSCC.2012.6523342","DOIUrl":"https://doi.org/10.1109/ASSCC.2012.6523342","url":null,"abstract":"UL and IEC have different definitions and standards for switchboards, switchgear, panelboards and MCCs. Hence the design architecture and production of such systems are different from scratch, but there is a possibility of making one common LV Switchboard to comply with all the different standards of UL and IEC. This paper studies differences between such IEC and UL standards and proposes a common design for LV Switchboard which can comply with all of these standards.","PeriodicalId":341348,"journal":{"name":"2012 10th International Power & Energy Conference (IPEC)","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114863764","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}