2009 International Conference on Power Systems最新文献_第2页

Real-time detection and analysis of PQ disturbances with DSP using matlab embedded link to code composer studio 利用matlab嵌入式DSP实时检测和分析PQ干扰，链接到代码编写工作室

2009 International Conference on Power Systems Pub Date : 2009-12-01 DOI: 10.1109/ICPWS.2009.5442725

P. Meena, K. Uma Rao, D. Ravishankar

引用次数: 7

Control of single-phase Z-source inverter for a grid connected system 并网系统单相z源逆变器控制

2009 International Conference on Power Systems Pub Date : 2009-12-01 DOI: 10.1109/ICPWS.2009.5442687

T. Chandrashekhar, M. Veerachary

引用次数: 24

Faulted phase selection on double circuit transmission line using wavelet transform and neural network 基于小波变换和神经网络的双回传输线故障选相

2009 International Conference on Power Systems Pub Date : 2009-12-01 DOI: 10.1109/ICPWS.2009.5442736

V. Kale, S. Bhide, P. Bedekar

{"title":"Faulted phase selection on double circuit transmission line using wavelet transform and neural network","authors":"V. Kale, S. Bhide, P. Bedekar","doi":"10.1109/ICPWS.2009.5442736","DOIUrl":"https://doi.org/10.1109/ICPWS.2009.5442736","url":null,"abstract":"Modern numerical relays often incorporate the logic for combined single and three-phase auto-reclosing scheme; single phase to earth faults initiate single-phase tripping and reclosure, and all the other faults initiate three-phase tripping and reclosure. Accurate faulted phase selection is required for such a scheme. This paper presents a novel scheme for detection and classification of faults on double circuit transmission line. The proposed approach uses combination of wavelet transform and neural network, to solve the problem. While wavelet transform is a powerful mathematical tool which can be employed as a fast and very effective means of analyzing power system transient signals, artificial neural network has a ability to classify non-linear relationship between measured signals by identifying different patterns of the associated signals. The proposed algorithm consists of time-frequency analysis of fault generated transients using wavelet transform, followed by pattern recognition using artificial neural network to identify the faulted phase. MATLAB/Simulink software is used to generate fault signals and verify the correctness of the algorithm. The adaptive discrimination scheme is tested by simulating different types of fault and varying fault resistance, fault location and fault inception time, on a given power system model. The simulation results show that the proposed phase selector scheme is able to identify faulted phase on the double circuit transmission line rapidly and correctly.","PeriodicalId":337759,"journal":{"name":"2009 International Conference on Power Systems","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130280824","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: 23

Modelling of risk drivers in valuation of electricity distribution business 配电企业估值中的风险驱动因素建模

2009 International Conference on Power Systems Pub Date : 2009-12-01 DOI: 10.1109/ICPWS.2009.5442698

Y. Bichpuriya, P. Chitkara

引用次数: 0

Wind power trading options in Indian electricity market: Inclusion of availability based tariff and day ahead trading 印度电力市场中的风电交易选择:包括基于可用性的电价和日前交易

2009 International Conference on Power Systems Pub Date : 2009-12-01 DOI: 10.1109/ICPWS.2009.5442733

D. K. Agrawal, N. P. Patidar, R. Nema

引用次数: 5

A novel method to assess global voltage stability of a multi-bus power system 多母线电力系统全局电压稳定性评估的新方法

2009 International Conference on Power Systems Pub Date : 2009-12-01 DOI: 10.1109/ICPWS.2009.5442739

S. Dey, R. Chowdhury, P. Das

引用次数: 0

Identification of PQ disturbances based on change in audible noise of three phase IM 基于三相IM可听噪声变化的PQ干扰识别

2009 International Conference on Power Systems Pub Date : 2009-12-01 DOI: 10.1109/ICPWS.2009.5442651

L. S. Patil, K. Patil, A. G. Thosar

{"title":"Identification of PQ disturbances based on change in audible noise of three phase IM","authors":"L. S. Patil, K. Patil, A. G. Thosar","doi":"10.1109/ICPWS.2009.5442651","DOIUrl":"https://doi.org/10.1109/ICPWS.2009.5442651","url":null,"abstract":"In India the technological developments in the last two decades have led to an ever-increasing use of electronic devices. Also, the Indian power sector is presently facing the serious power crisis. Therefore, quality of available power is emerging as a major problem, especially in rural area, where three phase Induction Motor is widely used by farmers and they encounter losses, due to poor PQ as most of them are not aware about PQ problem, also are not educated enough to understand the sophisticated measurement and analysis techniques. Hence, they must be acquainted with PQ problem by using the technique they can understand. The aim of this paper is to put the most common PQ disturbances in the way, that, a layman can understand. For any given IM the noise emitted by it under normal supply conditions and under the influences of PQ disturbances is distinctly different. Also, the change in noise depends upon the type of PQ disturbance and its severity. A laboratory experiment is setup for investigating, three different types of PQ disturbances, namely, sustained low voltage, supply-magnitude unbalance and harmonic distortions. A low cost and efficient method for data acquisition consists of a microphone to detect noise and PC sound card for A/D conversion. Data acquisition and signal de-noising is done in MATLAB. The results obtained in each case are presented.","PeriodicalId":337759,"journal":{"name":"2009 International Conference on Power Systems","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132086767","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: 0

Power sharing and stability enhancement of an autonomous microgrid with inertial and non-inertial DGs with DSTATCOM 具有DSTATCOM的惯性和非惯性dg自治微电网的功率共享和稳定性增强

2009 International Conference on Power Systems Pub Date : 2009-12-01 DOI: 10.1109/ICPWS.2009.5442666

R. Majumder, A. Ghosh, G. Ledwich, Firuz Zare

{"title":"Power sharing and stability enhancement of an autonomous microgrid with inertial and non-inertial DGs with DSTATCOM","authors":"R. Majumder, A. Ghosh, G. Ledwich, Firuz Zare","doi":"10.1109/ICPWS.2009.5442666","DOIUrl":"https://doi.org/10.1109/ICPWS.2009.5442666","url":null,"abstract":"This paper proposes a method of enhancing system stability with a distribution static compensator (DSTATCOM) in an autonomous microgrid with multiple distributed generators (DG). It is assumed that there are both inertial and non-inertial DGs connected to the microgrid. The inertial DG can be a synchronous machine of smaller rating while inertia less DGs (solar) are assumed as DC sources. The inertia less DGs are connected through Voltage Source Converter (VSC) to the microgrid. The VSCs are controlled by either state feedback or current feedback mode to achieve desired voltage-current or power outputs respectively. The power sharing among the DGs is achieved by drooping voltage angle. Once the reference for the output voltage magnitude and angle is calculated from the droop, state feedback controllers are used to track the reference. The angle reference for the synchronous machine is compared with the output voltage angle of the machine and the error is fed to a PI controller. The controller output is used to set the power reference of the synchronous machine. The rate of change in the angle in a synchronous machine is restricted by the machine inertia and to mimic this nature, the rate of change in the VSCs angles are restricted by a derivative feedback in the droop control. The connected distribution static compensator (DSTATCOM) provides ride through capability during power imbalance in the microgrid, especially when the stored energy of the inertial DG is not sufficient to maintain stability. The inclusion of the DSATCOM in such cases ensures the system stability. The efficacies of the controllers are established through extensive simulation studies using PSCAD.","PeriodicalId":337759,"journal":{"name":"2009 International Conference on Power Systems","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115614120","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: 22

A tool for real time demand estimation 实时需求估计的工具

2009 International Conference on Power Systems Pub Date : 2009-12-01 DOI: 10.1109/ICPWS.2009.5442684

V. Agrawal, U. Verma, Abhimanyu Gartia Rakesh, Rakesh

{"title":"A tool for real time demand estimation","authors":"V. Agrawal, U. Verma, Abhimanyu Gartia Rakesh, Rakesh","doi":"10.1109/ICPWS.2009.5442684","DOIUrl":"https://doi.org/10.1109/ICPWS.2009.5442684","url":null,"abstract":"Electrical load forecasting in power system is a most basic requirement to facilitate the generation scheduling and is an important task for ensuring reliability and economic operation. All around the globe a large number of load forecasting procedures / tools are being used and most of these basically use the statistical data to project the demand on daily/ weekly/ monthly/ yearly basis. However, due to the fast changing scenario in real time power system, the SCADA data of the recent past period can also immensely help the operator towards demand side management for the immediate future period say for next half an hour to one hour more accurately and quickly. In India with the increase in the size of the grids as well as large interconnections, along with the increased complexities towards power system operation and control, there has also been a phenomenal expansion and growth of power markets. These markets have assumed greater importance, particularly after the advent of The Electricity Act 2003, introduction of open access in transmission and emergence of power exchanges. In this paper an attempt has been made to deliberate on an approach which is helping in estimating the demand more accurately for shorter durations on a real time basis. The basic principle adopted in this approach is that it applies the simple time series analysis to estimate the demand in the dynamically changing grid conditions. This tool is in practical use and has been found to be of immense benefit to the grid operators at various state and regional load dispatch centres (LDC) in the country. With this utility the operators are able to estimate the demand for future 30 minutes on a real time basis and this is helping them in taking an advance action towards ensuring the grid operation with reliability, security and economy.","PeriodicalId":337759,"journal":{"name":"2009 International Conference on Power Systems","volume":"248 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124431879","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: 8

Congestion management using generation rescheduling and/or load shedding of sensitive buses 使用发电重新调度和/或敏感总线的减载进行拥塞管理

2009 International Conference on Power Systems Pub Date : 2009-12-01 DOI: 10.1109/ICPWS.2009.5442680

J. Hazra, A. Sinha, Y. Phulpin

引用次数: 21