{"title":"A novel method for SVC using nonlinear slope reactance","authors":"T. Niang, Xiao Xiang-ning, Chen Zheng","doi":"10.1109/CRIS.2010.5617479","DOIUrl":"https://doi.org/10.1109/CRIS.2010.5617479","url":null,"abstract":"The structure of Static Var Compensator (SVC) control system and compensation principle is briefly analyzed in this paper. Based on the control method of nonlinear norm transformation PID, a novel method for SVC using nonlinear slope reactance is presented. The simulation results show that the method can accelerate the stabilizing process and reduce rising time and overshoot obviously.","PeriodicalId":206094,"journal":{"name":"2010 5th International Conference on Critical Infrastructure (CRIS)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115275664","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 adaptive distance protection scheme for distribution system with distributed generation","authors":"Jing Ma, Jinlong Li, Zengping Wang","doi":"10.1109/CRIS.2010.5617480","DOIUrl":"https://doi.org/10.1109/CRIS.2010.5617480","url":null,"abstract":"The value setting of the traditional distance protection has become very difficult for the distribution system with distributed generators (DGs) owing to the randomness of the DG output power. This paper proposes a new adaptive distance protection scheme to solve this problem. Firstly, on the basis of the connected point of DGs, the protected feeders are divided into different zones, with adaptive distance protection configured at the upstream side of DG. Then, based on a fault characteristic analysis of the distribution system with DG, the adaptive distance protection scheme for the distribution system with DG is studied to solve this problem. The results show that this scheme can automatically calculate the settings according to the operation mode and the output power of DG with no need for communication. Compared with the traditional adaptive protection scheme, the performance of this method is greatly improved. Simulation results on a 10 kV distribution system have verified the validity of the scheme proposed.","PeriodicalId":206094,"journal":{"name":"2010 5th International Conference on Critical Infrastructure (CRIS)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121535248","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}
Geert Deconinck, W. Labeeuw, Stijn Vandael, H. Beitollahi, Klaas De Craemer, R. Duan, Zhifeng Qui, P. C. Ramaswamy, Bert Vande Meerssche, I. Vervenne, R. Belmans
{"title":"Communication overlays and agents for dependable smart power grids","authors":"Geert Deconinck, W. Labeeuw, Stijn Vandael, H. Beitollahi, Klaas De Craemer, R. Duan, Zhifeng Qui, P. C. Ramaswamy, Bert Vande Meerssche, I. Vervenne, R. Belmans","doi":"10.1109/CRIS.2010.5617536","DOIUrl":"https://doi.org/10.1109/CRIS.2010.5617536","url":null,"abstract":"Smart grids rely on a dependable information infrastructure for the monitoring and control applications. Two elements can enhance the suitability of the communication and control infrastructure for such smart grid applications. Overlay networks allow to resiliently deal with nodes that appear and disappear, as well as with the dynamic nature of the power values these nodes represent in a smart grid. Agents-based modelling allows to simulate the smart grid applications in a scalable and flexible way before deployment. The paper discusses how both approaches can be combined for simulating a more dependable smart grid.","PeriodicalId":206094,"journal":{"name":"2010 5th International Conference on Critical Infrastructure (CRIS)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126554165","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":"Forecasting of fluctuations and turning points of power demand in China based on the maximum entropy method and ARMA model","authors":"Lizi Zhang, Limei Xu","doi":"10.1109/CRIS.2010.5617508","DOIUrl":"https://doi.org/10.1109/CRIS.2010.5617508","url":null,"abstract":"Influenced by the economic cycle, power demand in china shows some cyclical fluctuations, which is unhealthy for the development of national economy and production efficiency of electric power industry. Correctly forecasting the fluctuation rule of power demand and the turning points in China is helpful to make the corresponding strategy complied with the cycle. With the full consideration of power demand fluctuations, the paper establishes a forecasting model based on maximum entropy method and ARMA model: firstly, the paper makes a spectrum analysis on the growth rate of power demand and the major cycle of the cyclical fluctuations can be correspondingly obtained, then a periodic function which can reflect the fluctuation features is employed through the least square method; secondly, the paper establishes an ARMA model on the residual series which can be obtained by eliminating the periodic sequence from the original series; at last, the hybrid forecasting model is obtained by combining the periodic function and ARMA model. Experimental results show that the proposed model is effective and reasonable.","PeriodicalId":206094,"journal":{"name":"2010 5th International Conference on Critical Infrastructure (CRIS)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126573324","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":"Disastrous space weather risk on large-scale power grid","authors":"Chunming Liu, Lian-guang Liu, Xiangzhi Niu","doi":"10.1109/CRIS.2010.5617523","DOIUrl":"https://doi.org/10.1109/CRIS.2010.5617523","url":null,"abstract":"Geomagnetically induced currents (GIC) flowing in technological networks at the Earth's surface are ground effects of space weather. During geomagnetic storms, such currents cause bias fluxes in transformers, resulting in half-cycle saturation. Severely distorted exciting currents which contain enormous amounts of harmonics threaten the safe operation of other equipment and even the whole power system. This paper discusses the correlation between current data measured in transformer neutrals and magnetic recordings, and proves that severe vibrations and increased noise phenomena in some transformers are caused by GIC. This paper thus clearly shows that GIC amplitude can be quite large even if in low latitude areas. The fact that calculated results of GIC match well with measured GIC data at the Ling'ao nuclear power plant shows that the Plane Wave Method can satisfy a certain precision in the calculation of the geoelectric field in mid-low latitude regions. Factors increasing GIC risks in China obviously include the very large size and small resistances of the interconnected high-voltage system. Compared to the present 500 kV grid, the GIC level of the 1000 kV UHV network being planned and constructed can be expected to be higher.","PeriodicalId":206094,"journal":{"name":"2010 5th International Conference on Critical Infrastructure (CRIS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129431447","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":"Economic loss evaluation and selective treatment of power quality","authors":"Ding Zejun, Z. Yongqiang, Xu Yu","doi":"10.1109/CRIS.2010.5617490","DOIUrl":"https://doi.org/10.1109/CRIS.2010.5617490","url":null,"abstract":"The importance and necessity of economic loss evaluation of power quality is discussed in the paper. In order to scientifically evaluate the economic loss of power quality indexes, the idea of meaningful classification of power quality problems is emphasized and the quality loss function is introduced into the evaluation models. According to the characteristics of continuous power quality problems, all indexes are divided into two intervals, namely qualified and unqualified, and evaluation methods based on quality loss function are proposed to calculate the economic loss caused by the exceeding indexes. In addition, effects of event-based power quality problems are fully considered, and their direct and potential economic loss evaluation models are determined according to their influence. On this basis, the concept of selective treatment of power quality is proposed, which solves the balance problem between technical and economic efficiency. It has highly practical operability and a light application prospect.","PeriodicalId":206094,"journal":{"name":"2010 5th International Conference on Critical Infrastructure (CRIS)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131335099","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 on PID parameters optimization of synchronous generator excitation control system","authors":"Yuan Cao, Jin Ma","doi":"10.1109/CRIS.2010.5617581","DOIUrl":"https://doi.org/10.1109/CRIS.2010.5617581","url":null,"abstract":"Synchronous generator excitation control system is one of the most important parts of power system control. And as PID control is one of the first developed and the most widely used control schemes in excitation system, its parameters tuning problem has been highly concerned. Since MATLAB genetic algorithm toolbox has the characteristics of strong robustness and efficient optimization, this paper first establishes a mathematical model of generator excitation system, and then uses ITSE index of terminal voltage step response curve as the optimization index, computes the fitness function based on SIMULINK platform, and uses MATLAB genetic algorithm toolbox to optimize PID parameters of synchronous generator excitation control system. Applying this method to a power plant's synchronous generator excitation system, results demonstrate that dynamic characteristics are improved greatly.","PeriodicalId":206094,"journal":{"name":"2010 5th International Conference on Critical Infrastructure (CRIS)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115290875","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 on the allocation mechanism of the LMP-based electricity market surplus","authors":"Youmin Li","doi":"10.1109/CRIS.2010.5617580","DOIUrl":"https://doi.org/10.1109/CRIS.2010.5617580","url":null,"abstract":"Locational Marginal Pricing (LMP) is a novel pricing electricity approach based on short term marginal cost. Compared to the conventional average accounting cost method, the LMP has the merits of real time reflecting electric energy's production cost, stimulating the customers' reasonable electricity consumption and reducing cross subsidies, etc. But the difference among different LMPs results in the market surplus on the spot market settlement, which is regarded as network rental. How to reasonably deal with this market surplus is of significance to improve market competition and ensure fair competition. This paper first gives the proof that market surplus is theoretically greater than zero, but affected by many factors; then compares the four allocation methods: transmission right, bilateral contract, receiving electric energy and transmission fee. Then the paper proposes an approach on allocating the market surplus based on transmission usage. Lastly the treatment to surplus deficiency is discussed.","PeriodicalId":206094,"journal":{"name":"2010 5th International Conference on Critical Infrastructure (CRIS)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120953444","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}
L. Coppolino, S. D'Antonio, L. Romano, G. Spagnuolo
{"title":"An Intrusion Detection System for Critical Information Infrastructures using Wireless Sensor Network technologies","authors":"L. Coppolino, S. D'Antonio, L. Romano, G. Spagnuolo","doi":"10.1109/CRIS.2010.5617547","DOIUrl":"https://doi.org/10.1109/CRIS.2010.5617547","url":null,"abstract":"Wireless Sensor Network (WSN) technology is being increasingly used for data collection in Critical Infrastructures (CIs). The paper presents an Intrusion Detection System (IDS), which is able to protect a CI from attacks directed to its WSN-based parts. By providing accurate and timely detection of malicious activities, the proposed IDS solution ultimately results in a dramatic improvement in terms of protection, since opportunities are given for performing proper remediation/reconfiguration actions, which counter the attack and/or allow the system to tolerate it. We present the basic ideas, discuss the main implementation issues, and perform a preliminary experimental campaign. Not only have experiments demonstrated the effectiveness of the proposed approach in protecting the system against two very serious attacks to WSNs (namely: sinkhole, and bogus packet), but they have also proved that the stringent requirements (in terms of limited availability of resources) which are typical of current state-of-the-art WSN technologies, are met.","PeriodicalId":206094,"journal":{"name":"2010 5th International Conference on Critical Infrastructure (CRIS)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124661597","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}
Zhongqiu Wang, Xi Li, Gengyin Li, Ming Zhou, K. Lo
{"title":"Energy storage control for the Photovoltaic generation system in a micro-grid","authors":"Zhongqiu Wang, Xi Li, Gengyin Li, Ming Zhou, K. Lo","doi":"10.1109/CRIS.2010.5617543","DOIUrl":"https://doi.org/10.1109/CRIS.2010.5617543","url":null,"abstract":"Distributed generation (DG) that uses renewable energy sources has an unstable output and this can negatively affect existing electric power systems. In order to reduce above impact, we need to develop an energy control system to control the output through individual DG installed in a micro-grid. First, this paper designs a grid-connected Photovoltaic (PV) system and introduces the operation principle of the various parts as well with the control strategy of the power flow. The design of energy storage is of great significance as the output power of PV cells array is greatly affected by the light intensity and the temperature change. Then, it uses the battery as the energy storage device and designs the charge-discharge control strategy according to the characteristics of the battery. Finally it verifies the feasibility of the energy storage control strategy through the simulation models which is built based on the PSCAD/EMTDC platform.","PeriodicalId":206094,"journal":{"name":"2010 5th International Conference on Critical Infrastructure (CRIS)","volume":"231 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116429452","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}