2010 International Conference on Power System Technology最新文献

{"title":"Research on probabilistic power flow of the distribution system with Photovoltaic System Generation","authors":"Shu-jun Yao, Yan Wang, Minxiao Hang, Xiaona Liu","doi":"10.1109/POWERCON.2010.5666569","DOIUrl":"https://doi.org/10.1109/POWERCON.2010.5666569","url":null,"abstract":"DG based on Photovoltaic System Generation (PVS) has the probabilistic output power relied on natural conditions, the traditional deterministic load flow is not a suitable tool for the analyzing and maintaining distribution system. Aiming at this problem, this paper applies a probabilistic power flow (PLF) method to evaluate the influence of distributed generation with PVS. Firstly, the probabilistic model of PVS is established, Secondly, instead of the conventional Gram-Charlier expansion, the model of combined cumulant and Cornish-Fisher expansion is applied to calculate the PLF. This model has the more convergence for on-Gaussian probabilistic density function. Lastly, the IEEE 34 distribution system with the modification by injecting the PVS to some nodes is tested. The results show that the method in this paper is efficient and reasonable.","PeriodicalId":169553,"journal":{"name":"2010 International Conference on Power System Technology","volume":"1999 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128258251","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 analog flexible fuzzy control to coordinated control system to improve load response speed of generating unit to AGC","authors":"Ze-lei Zhu, Z. Han","doi":"10.1109/POWERCON.2010.5666395","DOIUrl":"https://doi.org/10.1109/POWERCON.2010.5666395","url":null,"abstract":"Coordinated control system is a strong coupling, multiple-input and multiple-output system. Load and the main steam pressure control are interdependence, mutual constraints; it is non-linear dynamic characteristics of unit; boiler side emerge large delay. Therefore it is very difficulty of obtaining a satisfactory control effect for conventional control strategy. In order to improve the coordination control system performance, the non-linear mathematical models of once-through boiler unit are given. Analysis of the conventional boiler feed-forward control system and based on the thought that dynamic energy and static energy separation, the boiler analog flexible fuzzy control feed-forward controller is structured and applied in coordination control system of generator unit. This paper cites the concept of analogy flexible fuzzy control and applies the concept to coordinate control system. Through system parameters are reasonably set, dynamic energy and static energy can maintain a balance. The application of analogy flexible fuzzy control can overcome the big lag and the big inertia of boiler. It can effectively improve rate of coordinate control system responding to AGC load instructions.","PeriodicalId":169553,"journal":{"name":"2010 International Conference on Power System Technology","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129352923","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":"Vehicle to Grid — Monte Carlo simulations for optimal Aggregator strategies","authors":"C. Sandels, U. Franke, Niklas Ingvar, L. Nordstrom, Roberth Hamren","doi":"10.1109/POWERCON.2010.5666607","DOIUrl":"https://doi.org/10.1109/POWERCON.2010.5666607","url":null,"abstract":"Previous work has shown that it could be profitable on some control markets to use Plug-in Hybrid Electric Vehicles (PHEV) as control power resources. This concept, where battery driven vehicles such as PHEVs provide ancillary service to the grid is commonly referred to as Vehicle to Grid (V2G). The idea is to sell the capacity and energy of the parked PHEVs on the control market. Due to the fact that cars on average are parked 92% of the day, the availability of this capacity could be very high, even though it will be highly dependent on commuting patterns in peak hours. However, as each PHEV has a very small capacity from a grid perspective, it is necessary to implement an aggregating control system, managing a large number of vehicles. This paper presents strategies for an Aggregator to fulfill control bids on the German control markets. These strategies are tested with respect to reliability, efficiency and profitability in a Monte Carlo simulation model. The model is based on available data on the distributions of commuting departure times and travel distances, as well as average driving power consumption, PHEV battery capacities and the market constraints of the secondary control market in Germany.","PeriodicalId":169553,"journal":{"name":"2010 International Conference on Power System Technology","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127172395","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 solution to the Optimal Power Flow using Artificial Bee Colony algorithm","authors":"C. Sumpavakup, I. Srikun, S. Chusanapiputt","doi":"10.1109/POWERCON.2010.5666516","DOIUrl":"https://doi.org/10.1109/POWERCON.2010.5666516","url":null,"abstract":"Optimal Power Flow (OPF) is one of the most vital tools for power system operation analysis, which requires a complex mathematical formulation to find the best solution. Conventional methods such as Linear Programming, Newton-Raphson and Non-linear Programming were previously offered to tackle the complexity of the OPF. However, with the emergence of artificial intelligence, many novel techniques such as Artificial Neural Networks, Genetic Algorithms, Particle Swarm Optimization and other Swarm Intelligence techniques have also received great attention. This paper described the use of Artificial Bee Colony (ABC), which is one of the latest computational intelligence to solve the OPF problems. The results show that solving the OPF problem by the Artificial Bee Colony can be as effective as other swarm intelligence methods in the literature.","PeriodicalId":169553,"journal":{"name":"2010 International Conference on Power System Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130016757","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":"Research of safety and risk assessment technology for power system communication services","authors":"Ziyan Zhao, Jianming Liu, Ruiui Zhang, Kun Lu","doi":"10.1109/POWERCON.2010.5666425","DOIUrl":"https://doi.org/10.1109/POWERCON.2010.5666425","url":null,"abstract":"According to current application of the power system communication services and communication technology and network structure, a mathematical method of safety and risk assessment of electric power communication services is carried out. Considering the typical topology SDH transmission system network which is used widely in power system, this paper introduces the concept of the safety classification, importance degree of power system communication service, communication network point and transmission segment risk. This paper divides the risk into two kinds, recessive risk which is the risk caused by communication failure that will influence the power system directly and dominant risk which is the risk that influence power system indirectly. Using RBD (Reliable Block Diagram) and PRA (Probabilistic Reliability Assessment) the method, which combine reliability of communication network communication point or electric power optical cable, characteristics of power system operations classification, importance degree of power system operations together, can calculates reliability of power system communication services which have different communication channel organization patterns from point to point, and risks, including recessive risk and dominant risk, caused by power system communication service interruption and reliability degeneration for single communication network point or optical cable failure. It is proved that the method have very good practicality and operability according to the calculation result. The service reliability and risk assessment value calculated by this method accords with current application situation. This method can be used not only in reliability and risk assessment of power system communication network carrying the power system operations, but also in the power system communication service channel's optimization and adjustment while during common power system running and overhaul of the communication network. This method will bring help for the safe and reliable running for the power system and give important and scientific support for reducing risk for the power system communication network carrying the power system services.","PeriodicalId":169553,"journal":{"name":"2010 International Conference on Power System Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130094537","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":"Wide-area model predictive damping controller based on online recursive closed-loop subspace identification","authors":"Hua Ye, Yutian Liu","doi":"10.1109/POWERCON.2010.5666422","DOIUrl":"https://doi.org/10.1109/POWERCON.2010.5666422","url":null,"abstract":"This paper proposes an adaptive damping controller design method by integrating online recursive closed-loop subspace model identification with model predictive control theory. The reduced order state space model which contains dominant low frequency oscillation modes was firstly identified. According to model prediction and optimization with the current state of power system as the initial state, an infinite horizon closed-loop optimal control was obtained. Online model identification and control optimization were repeated in each time interval. The strategy overcomes the inherent shortcomings of controllers with fixed parameters based on offline identification thus solves the problem of the control performance degradation due to variation of the complex operation conditions and time-varying and uncertain characteristic of system parameters. Simulation results demonstrate the effectiveness and robustness of the proposed controller in damping inter-area low frequency oscillations. The strategy to coordinate the proposed controller with PSSs and other similar controllers in multi-machine power systems is also discussed.","PeriodicalId":169553,"journal":{"name":"2010 International Conference on Power System Technology","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128959222","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":"Energy production from landfill gases in African countries","authors":"W. N. Mbav, G. Coppez, S. P. Chowdhury, S. P. Chowdhury","doi":"10.1109/POWERCON.2010.5666063","DOIUrl":"https://doi.org/10.1109/POWERCON.2010.5666063","url":null,"abstract":"Over last two decades the risk and reality of environmental degradation have become more apparent with increasing economic development and population growth. Solving the current environmental problems, while addressing issues related to electricity generation and solid wastes problems, requires long-term potential actions for sustainable development. In this regard, renewable energy resources are recognised as one of the most efficient and effective solutions. Therefore, there is a need to expand the production of electricity from various forms of renewable energy. A review of the present energy situation in the Democratic Republic of Congo (DRC) and South Africa (RSA) is presented in this paper to show that using landfill gas for energy is a viable source of electricity for both the countries. The paper also analyzes the potential of Landfill gas recovery from waste, introduces systems that enable to generate energy, analyzes quantity and economic value of decomposition products (gas, byproducts), quantifies estimated construction and operating costs, and evaluates the economic and environmental impact.","PeriodicalId":169553,"journal":{"name":"2010 International Conference on Power System Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131064837","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":"Research of data acquisition method on smart substation","authors":"Y. Su, X. M. Wang","doi":"10.1109/POWERCON.2010.5666747","DOIUrl":"https://doi.org/10.1109/POWERCON.2010.5666747","url":null,"abstract":"Concentrated collection of all kind of data in smart substation is a valuable job. In this paper, a method of data acquisition is proposed in the smart substation. A communication server is used to access subsystems in the substation and the received data are modeled according to IEC61850 standard. The external interface is supplied in according with IEC 61970 GID and IEC 61850 MMS. By this way, requirement of data acquisition in smart substation is satisfied. Structure and function of the communication server are demonstrated. The detailed method of data acquisition is also presented. The whole scheme has been realized in XinGuo digital substation in JiangXi province.","PeriodicalId":169553,"journal":{"name":"2010 International Conference on Power System Technology","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132991727","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 approach for daily assessment of active power reserve capacity and spinning reserve allocation in a power system","authors":"Farzad Partovi, B. Mozafari, M. Ranjbar","doi":"10.1109/POWERCON.2010.5666585","DOIUrl":"https://doi.org/10.1109/POWERCON.2010.5666585","url":null,"abstract":"In this paper a new algorithm for determination of optimal active power reserve capacity requirements and energy and spinning reserve allocation in power system during the 24 hours is presented. In the proposed method, the optimum amount of reserve capacity per hour is determined proportional to network security level required by the system operator. In this way, it is essential to define a proper index for measuring system security. Thus, we have used Expected Load Not Served (ELNS) to evaluate system security in each hour. The proposed method has been implemented over the IEEE 24-bus test system and the results are compared with a deterministic security approach, which considers certain and fixed amount of reserve capacity in each hour. This comparison is done from economic and reliability points of view. The promising results show the effectiveness of the proposed model which is solved using mixed integer linear programming (MILP) and GAMS software is used.","PeriodicalId":169553,"journal":{"name":"2010 International Conference on Power System Technology","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130827953","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":"Developing frequency dependent power system equivalent model using QZ algorithm for transient studies","authors":"N. Khalil nejad, M. Naderi, M. S. Naderi","doi":"10.1109/POWERCON.2010.5666454","DOIUrl":"https://doi.org/10.1109/POWERCON.2010.5666454","url":null,"abstract":"In electromagnetic transient studies, only a small part of an AC power system can be modeled in detail. The remaining parts of the system should be reduced to equivalent model. This study presents an approach for obtaining network equivalents for ac power systems using QZ algorithm. The proposed method obtains accurate resonant frequencies directly from the system equations to be used in finding the network equivalent parameters. Also, the proposed method is a useful tool to predict the system response and has the following advantages. It has less complexity because it obtains the minima and maxima frequencies directly from the system equations. It gives reliable prediction and complete information about behavior of the test system and its peaks and troughs before calculating its frequency response. The proposed method determines the accurate value for resistors of the network equivalent model as the real part of the impedance function magnitude at the minima frequency points. In this study, a general algorithm is developed to determine the frequency dependent network equivalent model parameters for any given system. Finally, this method is implemented on Hormozgan network as a part of Iran electric power network and the parameters of equivalent circuit are calculated.","PeriodicalId":169553,"journal":{"name":"2010 International Conference on Power System Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130241838","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}