检索结果-南通市图书馆

维普期刊数据库

Contribution to Asymmetrical Compensation through Parallel Controllers of facts (STATCOM)—IPC 240 Dual for a Power Transmission Line

在线全文

学校读者我要写书评

暂无评论

World Journal of Engineering and Technology 2023年第1期11卷 20-40页

作者： Kengne Chatue Charlène Steva Mengata Mengounou Ghislain Koko Koko Joseph Batassou Guilzia Jeannot Nneme Nneme Leandre Laboratory of Computer and Automatic Engineering UFD of Engineering Sciences ENSET University of Douala Douala Cameroon

This work is part of the resolution of problems encountered on a 225 KV MANGOMBE-OYOMABANG line. This line is characterized by important technical losses, so that the voltage injected in the busbar is always lower than 200kV. The main objective of this work is to show the new solutions that can provide a combined facts-STATCOM and IPC 240 dual system on this line. Then to show the limitation of STATCOM compared to RPI 240. The results obtained allowed us to observe that in symmetrical operation the STATCOM improves the voltage profile on the busbar and in asymmetrical operation we found that it continues to regulate the voltage of each phase despite the unbalance. But the system remains too unbalanced because of the sequence current flow. The IPC 240 corrects this limitation, allowing asymmetrical operation of the line in an emergency while providing continuous service to the load.

关键词： facts STATCOM IPC 240 Dual Symmetry Asymmetry Contingency Voltage Profile

Firefly Algorithm in Determining Maximum Load Utilization Point and Its Enhancement through Optimal Placement of facts Device

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Circuits and Systems 2016年第10期7卷 3081-3094页

作者： S. Rajasekaran Dr. S. Muralidharan Department of Electrical and Electronics Engineering Thamirabharani Engineering College Tirunelveli India Department of Electrical and Electronics Engineering Mepco Schlenk Engineering College Sivakasi India

In a Power System, load is the most uncertain and extremely time varying unit. Hence it is important to determine the system’s supreme acceptable loadability limit called maximum loadability point to accommodate the sudden variation of load demand. Nowadays the enhancement of the maximum loadability point is essential to meet the rapid growth of load demand by improvising the system’s load utilization capacity. Flexible AC Transmission system devices (facts) with their speed and flexibility will play a key role in enhancing the controllability and power transfer capability of the system. Considering the theme of facts devices in the loadability limit enhancement, in this paper maximum loadability limit determination and its enhancement are prepared with the help of swarm intelligence based meta-heuristic Firefly Algorithm(FFA) by finding the optimal loading factor for each load and optimally placing the SVC (Shunt Compensation) and TCSC (Series Compensation) facts devices in the system. To illuminate the effectiveness of facts devices in the loadability enhancement, the line contingency scenario is also concerned in the study. The study of facts based maximum system load utilization acceptability point determination is demonstrated with the help of modified IEEE 30 bus, IEEE 57 Bus and IEEE 118 Bus test systems. The results of facts devices involvement in determining the maximum loading point enhance the load utilization point in normal state and also help to overcome the system violation in transmissionline contingency state. Also the firefly algorithm in determining the maximum loadability point provides better search capability with faster convergence rate compared to that of Particle swarm optimization (PSO) and Differential evolution algorithm.

关键词： facts Maximum Loadability Firefly Algorithm (FFA)

SOME facts AND ISSUES ABOUT TGP

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Sediment Research 1994年第3期 75-84页

作者： LIN Bingnan(P.N.Lin)( IWHR, Chairman of Advisory Board, IRTCES.)

ＳＯＭＥＦＡＣＴＳＡＮＤＩＳＳＵＥＳＡＢＯＵＴＴＧＰ￥ＬＩＮＢｉｎｇｎａｎ（Ｐ．Ｎ．Ｌｉｎ）（ＰｒｅｓｉｄｅｎｔＥｍｅｒｉｔｕｓｏｆＩＷＨＲ，ＣｈａｉｒｍａｎｏｆＡｄｖｉｓｏｒｙＢｏａｒｄ，ＩＲＴＣＥＳ．）Ａｂｓｔｒ... 详细信息

ＳＯＭＥＦＡＣＴＳＡＮＤＩＳＳＵＥＳＡＢＯＵＴＴＧＰ￥ＬＩＮＢｉｎｇｎａｎ（Ｐ．Ｎ．Ｌｉｎ）（ＰｒｅｓｉｄｅｎｔＥｍｅｒｉｔｕｓｏｆＩＷＨＲ，ＣｈａｉｒｍａｎｏｆＡｄｖｉｓｏｒｙＢｏａｒｄ，ＩＲＴＣＥＳ．）Ａｂｓｔｒａｃｔ：Ｔｈｉｓａｒｔｉｃｌｅｐｏ...

关键词： facts SOME facts AND ISSUES ABOUT TGP

TWO facts CONTRADICTING WITH CONCLUSION OF L. MANSINHA AND D. E. SMYLIE

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1986年第11期31卷 790-791页

作者：高建国 Beijing Observatory Academia Sinica

In polar coordination the pole moves basically clockwise. The quantity of motion per unit time is called the velocity of pole motion, the unit adopted being the sliding pace per 1.1 yr or 0.5 yr. In both the new seque... 详细信息

关键词： polar basically facts anomaly sliding manifest moves return sharply Correlation

维普期刊数据库

Reactive Power and facts Cost Models’ Impact on Nodal Pricing in Hybrid Electricity Markets

在线全文

学校读者我要写书评

暂无评论

Smart Grid and Renewable Energy 2011年第3期2卷 230-244页

作者： Ashwani Kumar 不详

In a competitive environment reactive power management is an essential service provided by independent system operator taking into account the voltage security and transmission losses. The system operator adopts a transparent and non-dis-criminatory procedure to procure the reactive power supply for optimal deployment in the system. Since generators’ are the main source of reactive power generation and the cost of the reactive power should be considered for their noticeable impact on both real and reactive power marginal prices. In this paper, a method based on marginal cost theory is presented for locational marginal prices calculation for real and reactive power considering different reactive power cost models of generators’ reactive support. With the presence of facts controllers in the system for more flexible operation, their impact on nodal prices can not be ignored for wheeling cost determination and has also to be considered taking their cost function into account. The results have been obtained for hybrid electricity market model and results have also been computed for pool model for comparison. Mixed Integer Non-linear programming (MINLP) approach has been formulated for solving the complex problem with MATLAB and GAMS interfacing. The proposed approach has been tested on IEEE 24-bus Reliability Test System (RTS).

关键词： Real and Reactive Power Nodal Price Reactive Power Cost Model facts Cost Model Bilateral Transactions Hybrid Market Model

Improving Voltage Stability of Power System by Optimal Location of facts Devices Using Bio-Inspired Algorithms

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Circuits and Systems 2016年第6期7卷 805-813页

作者： Archana Naganathan Vidhyapriya Ranganathan Department of Information Technology PSG College of Technology Coimbatore India

Power system operations can be optimized using power electronics based facts devices. The location of these devices at appropriate transmission line plays a major role in their performance. In this paper, two bio-inspired algorithms are used to optimally locate two facts devices: UPFC and STATCOM, so as to reduce the voltage collapse and real power losses. Particle swarm optimization and BAT algorithms are chosen as their behaviour is similar. VCPI index is used as a metric to calculate the voltage collapse scenario of the power system. The algorithm is tested on two benchmark power systems: IEEE 118 and the Indian UPSEB 75 bus system. Performance metrics are compared with the system without facts devices. Application of PSO and BAT algorithms to optimally locate the facts devices reduces the VCPI index and real power losses in the system.

关键词： BAT facts Optimal Location PSO STATCOM UPFC Voltage Stability

Wavelet Entropy Based Algorithm for Fault Detection and Classification in facts Compensated Transmission Line

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Energy and Power Engineering 2011年第1期3卷 34-42页

作者： Amany M. El-Zonkoly Hussein Desouki 不详

Distance protection of transmission lines including advanced flexible AC transmission system (facts) de-vices has been a very challenging task. facts devices of interest in this paper are static synchronous series compensators (SSSC) and unified power flow controller (UPFC). In this paper, a new algorithm is proposed to detect and classify the fault and identify the fault position in a transmission line with respect to a facts device placed in the midpoint of the transmission line. Discrete wavelet transformation and wavelet entropy calculations are used to analyze during fault current and voltage signals of the compensated transmission line. The proposed algorithm is very simple and accurate in fault detection and classification. A variety of fault cases and simulation results are introduced to show the effectiveness of such algorithm.

关键词： facts SSSC UPFC Wavelet Transform Entropy Calculation

facts和新型输电技术发展现状及在我国特高压电网中的应用前景研究

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

电工电能新技术 2013年第4期32卷 84-90页

作者：王义红周勤勇卜广全郭小江中国电力科学研究院北京100192

本文总结了目前国际上新型输电技术和facts技术的特点,并结合我国坚强智能电网"十二五"中长期规划,分析国际上输电领域和facts领域各种新技术在我国的应用前景,定性给出各种新技术在我国特高压电网中的应用场合以及建议。

关键词：特高压电网新型输电技术 facts 应用前景

维普期刊数据库

Alleviating Bottlenecks in Power Interconnectors by Means of facts

在线全文

学校读者我要写书评

暂无评论

Journal of Energy and Power Engineering 2012年第12期6卷 2046-2053页

作者： Rolf Grunbaum Talivaldis Podins ABB AB FACTS Vasteras SE-721 64 Sweden ABB S1A Riga 1058 Latvia

Power interconnections are becoming increasingly important in various parts of the world, as incentives for power exchange between countries are growing. A current example is that the Baltic Energy Market Interconnection Plan is launched by the European Council. For a variety of reasons, it is desirable to keep transmission corridors as slender as possible, i.e. keeping the number of lines as limited as possible, while still keeping adequate stability and power transmission capacity over the corridor. This is true, no matter whether it concerns a green-field project, or if it is a question of expanding an existing transmission corridor into higher power transmission capability. To achieve this, facts （flexible AC transmission systems）, based on state of the art high power electronics, is a highly useful option, from technical, economical and environmental points of view, to increase the utilization and stability of a transmission system or intertie. The paper presents salient design features as well as benefits of recently installed facts devices, more specifically SVC （static var compensators） and series capacitors, for enabling or improving cross-border as well as interregional power transfer in a cost-effective and environmentally friendly way.

关键词： facts power transmission stability SVC series compensation transient stability voltage stability.