Abstract
An efficient method for small-signal stability assessment of P - /Q - V droop control methods for multiple converters in an isolated micro-grid (MG) is proposed in this paper. A MG model described with arbitrary number of converters is explored first. If there are more number of converters in a chosen MG, only dominant eigenvalues related to droop control are of primary interest. Therefore, constructing a reduced-order model to speed up the small-signal stability assessment becomes necessary. By extending the previous work of MG with P - /Q - V droop control, a reduced-order model of MG with P - /Q - V droop control is investigated under mild assumptions. Such a simplified model will facilitate to compute the poles and zeros of the closed-loop systems and provide more physical insight to examine the relationship between dominant eigenvalues and each droop control gain. As the mathematical analysis of conventional P - /Q - V droop control provides the characteristic polynomials contributed by P - and Q - V droop controls, the P - /Q - V droop control also provides a similar characteristic polynomials contributed by P - and Q - V droop controls. These characteristic polynomials of the system helps MG operators for better tuning of each droop gain for stable operation of MG. A detailed study of actual plant model and the reduced-order plant model are investigated. Both simulation and experimental results are presented to validate the proposed method.
Original language | English |
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Title of host publication | IEEE Industry Application Society, 52nd Annual Meeting |
Subtitle of host publication | IAS 2016 |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
ISBN (Electronic) | 9781467386715 |
DOIs | |
State | Published - 02 11 2016 |
Externally published | Yes |
Event | 52nd Annual Meeting on IEEE Industry Application Society, IAS 2016 - Portland, United States Duration: 02 10 2016 → 06 10 2016 |
Publication series
Name | IEEE Industry Application Society, 52nd Annual Meeting: IAS 2016 |
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Conference
Conference | 52nd Annual Meeting on IEEE Industry Application Society, IAS 2016 |
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Country/Territory | United States |
City | Portland |
Period | 02/10/16 → 06/10/16 |
Bibliographical note
Publisher Copyright:© 2016 IEEE.
Keywords
- Characteristic Polynomials
- Droop control
- Micro-Grid (MG)
- Power Converters
- Small-Signal Stability