Voltage stability assessment for distrbuted generation in islanded microgrid system
The increasing energy demands are stressing the generation and transmission capabilities of the power system. Distributed generation (DG), which generally located in distribution systems, has the ability to meet some of the growing energy demands. However, unplanned application of individual dist...
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| Format: | Thesis |
| Language: | English English English |
| Published: |
2012
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/2375/1/24p%20SALEH%20ALI%20AHMED%20HENDI%20GAREH.pdf http://eprints.uthm.edu.my/2375/2/SALEH%20ALI%20AHMED%20HENDI%20GAREH%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/2375/3/SALEH%20ALI%20AHMED%20HENDI%20GAREH%20WATERMARK.pdf |
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| Summary: | The increasing energy demands are stressing the generation and transmission
capabilities of the power system. Distributed generation (DG), which generally
located in distribution systems, has the ability to meet some of the growing energy
demands. However, unplanned application of individual distributed generators might
cause other technical problems. The microgrid concept has the potential to solve
major problems arising from large penetration of DG in distribution systems. A
microgrid is not a forceful system when it is compared to a power system. This
project proposes a simulation approach to study voltage stability index (VSI) and
voltage stability analysis in microgrid system for the improvement of the dynamic
voltage stability in a microgrid in case of the dynamic voltage insufficiency. A
model of IEEE-14 Bus System has been presented as a case study of an islanded
microgird system. This project also presented line voltage stability index analysis
which accurately performs voltage stability analysis at each transmission line and
precisely predicts voltage collapse on power systems. A formula to calculate VSI has
been derived and applied on two cases on the system. To show the effectiveness of
the proposed voltage stability analysis method, this approach is implemented in a
microgrid test system (14-bus, 20 lines) in PSAT which is a MATLAB toolbox
environment. The test system has four diesel DGs and a wind turbine connected with
eleven constant loads. The dynamic simulation of the test system is carried out for
various types of disturbances. Islanded mode of operation is considered in this study.
Fast Voltage Stability Index (FVSI) and voltage stability analysis have been
successfully implemented and analysed. |
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