AI SearchAnalytical study of factors affecting to electromechanical oscillations in power systems (Record no. 5372)
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| fixed length control field | 04946nas|a2200397 a 4500 |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20260817162537.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 070824s2006 th uu|m rtt 0| a1eng d |
| 035 ## - SYSTEM CONTROL NUMBER | |
| System control number | .b12020424 |
| 099 #9 - LOCAL FREE-TEXT CALL NUMBER (OCLC) | |
| Classification number | AIT Thesis no.ET-06-19 |
| 100 1# - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Angammana, Mohottige Chitral Jayasanka |
| 245 10 - TITLE STATEMENT | |
| Title | Analytical study of factors affecting to electromechanical oscillations in power systems |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. | |
| Place of publication, distribution, etc. | Pathum Thani, Thailand : |
| Name of publisher, distributor, etc. | Asian Institute of Technology, |
| Date of publication, distribution, etc. | 2006 |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | 130 p. : |
| Other physical details | ill. |
| 490 1# - SERIES STATEMENT | |
| Series statement | Thesis ; |
| Volume/sequential designation | no. ET-06-19 |
| 500 ## - GENERAL NOTE | |
| General note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development |
| 502 ## - DISSERTATION NOTE | |
| Dissertation note | Thesis (M.Eng.) - Asian Institute of Technology, 2006 |
| 520 ## - SUMMARY, ETC. | |
| Summary, etc. | The origin of inter-area oscillations can be illustrated by a spring-mass system, which is a mechanical analogue of a two area power system. The masses represent the aggregated inertias of the rotating generators and turbines of both areas, each having a well meshed grid inside the areas. The spring corresponds to a relatively weak interconnection line. Electromechanical oscillations are inherent to interconnected power systems. However, the frequency of oscillations and the number of generators that oscillate in any electromechanical oscillatory node depend on the structure of the power system network. Low frequency electromechanical oscillations occur when existing generation and load areas are connected to other similar areas by relatively weak transmission lines. Weak interconnections are obvious in many interconnected systems, for example, when two independent electric grids arc interconnected for the first time through one or two tie lines. However, in systems that have been interconnected for some time, such as the WSCC interconnected system, and that are being stressed by increased load, weak links are less obvious. Often, the first signs of trouble are low frequency oscillations becoming unstable. The connection between loading and stability is not always understandable. It is also unclear which contingencies may lead to oscillatory instability. Electromechanical oscillations in power systems are essentially linear in character. That is, the frequency and damping of an oscillation may be calculated from a dynamic system model linearized for small changes about a particular operating condition. The eigenvalues of the linear model give the frequency and damping of the system oscillations. The eigenvectors indicate the relative magnitude and phase angle between the state variables (in classical generator models, there are two states per generator, the changes in rotor angle and speed). In systems having a number of low frequency inter-area modes, we can use the coherency of the angle components of eigenvectors of the inter-area modes to identify relatively closely coupled generators. More than this, we can also identify those buses that have voltage phase angles that are coherent with the angles of a set of coherent generators. This divides the system into sets of coherent buses and generators equal in number to the number of inter-area modes. The tie lines between one coherent group and another are the weak connections that are the root cause of the inter-area oscillations. Here we list documented cases of oscillatory instability and review to illustrate the characteristics of the problems faced if oscillatory stability is not well managed. The cases arc described briefly in chapter 3. This Thesis examines in detail the relationship between low frequency oscillations and network parameters such as line reactance as well as loading. The basis of the analytical study will be on single machine infinite bus system. The results will be proved by eigenvalue analysis and time domain simulation. Further clarification has been done using two area test system |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | Oscillations |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | Electric power systems |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Nadarajah, Mithulananthan, |
| Relator term | Chairperson |
| 700 0# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Surapong Chiraratananon, |
| Relator term | Examination Committee |
| 700 0# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Weerakorn Ongsakul, |
| Relator term | Examination Committee |
| 710 2# - ADDED ENTRY--CORPORATE NAME | |
| Corporate name or jurisdiction name as entry element | Asian Development Bank - Japan Scholarship Program (ADB - JSP), |
| Relator term | Scholarship donor |
| 810 2# - SERIES ADDED ENTRY--CORPORATE NAME | |
| Corporate name or jurisdiction name as entry element | Asian Institute of Technology. |
| Title of a work | Thesis ; |
| Volume/sequential designation | no. ET-06-19 |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Materials specified | Full-Text |
| Uniform Resource Identifier | <a href="http://203.159.5.9/ait-thesis/detail.php?q=B10585">http://203.159.5.9/ait-thesis/detail.php?q=B10585</a> |
| 907 ## - LOCAL DATA ELEMENT G, LDG (RLIN) | |
| a | .b12020424 |
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| c | u |
| 902 ## - LOCAL DATA ELEMENT B, LDB (RLIN) | |
| a | 240401 |
| 998 ## - LOCAL CONTROL INFORMATION (RLIN) | |
| Operator's initials, OID (RLIN) | 0 |
| Cataloger's initials, CIN (RLIN) | 070824 |
| First date, FD (RLIN) | m |
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| 945 ## - LOCAL PROCESSING INFORMATION (OCLC) | |
| l | mnait |
| 945 ## - LOCAL PROCESSING INFORMATION (OCLC) | |
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| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Koha item type | 22-AIT Thesis (Replacement) |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Koha item type | 40-Archives |
| 909 ## - LOCAL ITEMS USED | |
| Barcode | Barcode : 30050120602080 |
| CREATED | CREATED : 2014-11-02 |
| RECORD Id | RECORD # : i12761709 |
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| 909 ## - LOCAL ITEMS USED | |
| Barcode | Barcode : 30050120369391 |
| CREATED | CREATED : 2016-07-06 |
| RECORD Id | RECORD # : i13021059 |
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| Withdrawn status | Lost status | Damaged status | Not for loan | Home library | Current library | Shelving location | Date acquired | Cost, normal purchase price | Total checkouts | Full call number | Barcode | Date last seen | Copy number | Price effective from | Koha item type |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Available for Loans | Asian Institute of Technology Library | Asian Institute of Technology Library | AIT Publications | 17/08/2026 | 50.00 | AIT Thesis no.ET-06-19 | 30050120602080 | 17/08/2026 | 3 | 17/08/2026 | 22-AIT Thesis (Replacement) | ||||
| Available for Loans | Asian Institute of Technology Library | Asian Institute of Technology Library | Archives | 17/08/2026 | AIT Thesis no.ET-06-19 | 30050120369391 | 17/08/2026 | 17/08/2026 | 40-Archives |