Droop-Based Distributed Cooperative Control for Microgrids With Time-Varying Delays
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- 22 April 2016
- journal article
- research article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Smart Grid
- Vol. 7 (4), 1775-1789
- https://doi.org/10.1109/tsg.2016.2557813
Abstract
This paper develops a droop-based distributed cooperative control scheme for microgrids under a switching communication network with non-uniform time-varying delays. We first design a pinning-based frequency/voltage controller containing a distributed voltage observer and then design a consensus-based active/reactive power controller, which are employed into the secondary control stage to generate the nominal set points used in the primary control stage for different distributed generators (DGs). By this approach, the frequencies and the weighted average value of all DGs’ voltages can be pinned to the desired values while maintaining the precise active and reactive power sharing. With the proposed scheme, each DG only needs to communicate with its neighbors intermittently, even if their communication networks are local and time-varying, and their variant delays may be non-uniform. Sufficient conditions on the requirements for the network connectivity and the delay upper bound that guarantee the stability and reliability of the microgrid are presented. The effectiveness of the proposed control scheme is verified by the simulation of a microgrid test system.Keywords
Funding Information
- National Key Technology Support Program of China (2013BAA01B01)
- National Natural Science Foundation of China (61403133, 61374064)
- International Post-Doctoral Exchange Fellowship Program (20140034)
- Australia Research Council (140100544)
- China Post-doctoral Foundation (2013M540627)
- Hunan Provincial Post-Doctoral Special Foundation (2013RS4042)
- Hunan Provincial Natural Science Foundation (14JJ3051)
- Doctoral Fund of Ministry of Education of China (20130161120016)
- Fundamental Research Funds for the Central Universities (531107040651, 2014208020201)
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