2011 IEEE/PES Power Systems Conference and Exposition最新文献_第3页

Determining critical activation time of inductive fault current limiters in electric power systems 电力系统电感式故障限流器临界激活时间的确定

2011 IEEE/PES Power Systems Conference and Exposition Pub Date : 2011-03-20 DOI: 10.1109/PSCE.2011.5772617

Yucheng Zhang, R. Dougal

{"title":"Determining critical activation time of inductive fault current limiters in electric power systems","authors":"Yucheng Zhang, R. Dougal","doi":"10.1109/PSCE.2011.5772617","DOIUrl":"https://doi.org/10.1109/PSCE.2011.5772617","url":null,"abstract":"With the capacity expansion of power systems, fault currents may exceed the interrupting capacity ratings of circuit breakers (CBs). Inductive fault current limiters (FCLs) are able to effectively limit fault currents and maintain circuit breakers on duty. For power systems of different ratings, it is important to decide whether the parameters of an inductive FCL satisfy the requirement of limiting fault currents under a user-defined value. By analyzing the transient performance of fault current limitation processes, the critical activation time of inductive FCLs has been formulated. The critical activation time relates to the system voltage ratings, the inductances of FCLs and the upbound of fault currents choosen by users or CB's ratings. Fault currents can be limited under any user-defined value when the activation time is shorter than the critical one. The equation reveals that an inductive FCL which works in medium-voltage systems may not be able to limit fault current under a certain value in high-voltage systems. An inductive FCL should be checked according to this equation before it is applied to a paticular power system. These conclusions are verified by simulation results.","PeriodicalId":120665,"journal":{"name":"2011 IEEE/PES Power Systems Conference and Exposition","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131643179","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}

引用次数: 2

Marginal unit generation sensitivity and its applications in transmission congestion prediction and LMP calculation 边际发电灵敏度及其在输电拥塞预测和LMP计算中的应用

2011 IEEE/PES Power Systems Conference and Exposition Pub Date : 2011-03-20 DOI: 10.1109/PSCE.2011.5772610

R. Bo, F. Li

{"title":"Marginal unit generation sensitivity and its applications in transmission congestion prediction and LMP calculation","authors":"R. Bo, F. Li","doi":"10.1109/PSCE.2011.5772610","DOIUrl":"https://doi.org/10.1109/PSCE.2011.5772610","url":null,"abstract":"Conventional optimization technique suggests that marginal unit generation sensitivity (MUGS) may be calculated based on perturbation at optimality. The calculated MUGS however only applies to the perturbed operating point. Often times it is not advisable to apply this local information to predict generations at another loading level with considerable load change, and therefore another calculation has to be performed to obtain the generation and its sensitivity at that loading level. It is of high interest to obtain a global pattern of the sensitivity in a wider range of loading levels, which bears great potential in applications such as congestion prediction and LMP calculation. Existing work have shown MUGS can be well approximated by a linear function of load. In this paper, explicit formulations are derived for some special cases and show that MUGS is precisely a linear function or constant in those cases. The usefulness of MUGS is demonstrated with two applications, congestion prediction and LMP (sensitivity) calculation. Based on MUGS, optimal load shift factor (OLSF) is proposed to facilitate predicting future binding constraints such as transmission congestions. As a function of MUGS, LMP and its sensitivity can be easily obtained.","PeriodicalId":120665,"journal":{"name":"2011 IEEE/PES Power Systems Conference and Exposition","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126988597","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}

引用次数: 3

Grid connected DC distribution system for efficient integration of sustainable energy sources 并网直流配电系统对可持续能源的有效整合

2011 IEEE/PES Power Systems Conference and Exposition Pub Date : 2011-03-20 DOI: 10.1109/PSCE.2011.5772623

M. Elshaer, A. Mohamed, O. Mohammed

引用次数: 16

“Recent feature additions and changes in CIM” — Kendall Demaree, Alstom Grid “CIM的最新特性添加和更改”- Kendall Demaree, Alstom Grid

2011 IEEE/PES Power Systems Conference and Exposition Pub Date : 2011-03-20 DOI: 10.1109/PSCE.2011.5772506

K. Demaree

引用次数: 0

Multivariable control strategy for autonomous operation of a converter-based distributed generation system 基于变流器的分布式发电系统自主运行多变量控制策略

2011 IEEE/PES Power Systems Conference and Exposition Pub Date : 2011-03-20 DOI: 10.1109/PSCE.2011.5772603

Afsoon Nejati, A. Nobakhti, H. Karimi

{"title":"Multivariable control strategy for autonomous operation of a converter-based distributed generation system","authors":"Afsoon Nejati, A. Nobakhti, H. Karimi","doi":"10.1109/PSCE.2011.5772603","DOIUrl":"https://doi.org/10.1109/PSCE.2011.5772603","url":null,"abstract":"This paper presents a control strategy for the autonomous (islanded) operation of a distributed generation (DG) unit. The DG unit supplies a balanced load through a voitage-sourced converter (VSC). To maintain the autonomous operation in the islanded mode, the DG unit should provide its dedicated load with a sinusoidal voltage with a constant magnitude and a constant frequency. The dynamic model of the islanded DG system is represented by a set of nonlinear equations. Since the objective is to regulate voltage and frequency of the islanded DG about their rated values, the nonlinear model is linearized about the operating point. The obtained linearized model represents a multivariable LTI system with the converter voltages as the inputs, and the load voltage magnitude and frequency as the outputs. Based on the Nyquist array method, a controller is designed to achieve the objectives for the islanded system. To verify the effectiveness of the proposed control strategy, a set of nonlinear simulation case studies are carried out in the MATLAB/SimPowerSystems toolbox. In particular, the performance of the proposed controller with respect to the reference signal tracking and the load resistance perturbations is verified. The simulation results show that the proposed control strategy offers a good robust tracking/performance properties.","PeriodicalId":120665,"journal":{"name":"2011 IEEE/PES Power Systems Conference and Exposition","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133776840","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}

引用次数: 3

Market-based transmission expansion planning 市场化输电扩容规划

2011 IEEE/PES Power Systems Conference and Exposition Pub Date : 2011-03-20 DOI: 10.1109/PSCE.2011.5772507

Yang Gu, J. McCalley

引用次数: 13

An evaluation of the NaS battery storage potential for providing regulation service in California NaS电池在加州提供监管服务的潜力评估

2011 IEEE/PES Power Systems Conference and Exposition Pub Date : 2011-03-20 DOI: 10.1109/PSCE.2011.5772494

N. Lu, M. Weimar, Y. Makarov, C. Loutan

引用次数: 24

A novel approach to dynamic stability enhancement using PID damped fuzzy susceptance controlled SVC 一种基于PID阻尼模糊电纳控制的SVC动态稳定性增强新方法

2011 IEEE/PES Power Systems Conference and Exposition Pub Date : 2011-03-20 DOI: 10.1109/PSCE.2011.5772445

D. Harikrishna, R. S. Dhekekar, N. Srikanth

引用次数: 11

Existing transmission charging practices in India: Discouraging for power market 印度现有的输电收费做法:对电力市场不利

2011 IEEE/PES Power Systems Conference and Exposition Pub Date : 2011-03-20 DOI: 10.1109/PSCE.2011.5772442

Niranjan Kumar, Y. Reddy, D. Das, N. Padhy

引用次数: 4

Capacity standardization of shunt power reactors in Mexico 墨西哥并联电抗器容量标准化

2011 IEEE/PES Power Systems Conference and Exposition Pub Date : 2011-03-20 DOI: 10.1109/PSCE.2011.5772477

J. Quintana, F. Ibarra

引用次数: 0