Tools for handling steady‐state under‐frequency regulation in isolated microgrids
| Autor: | Paula O. La Gatta, João Alberto Passos Filho, José Luiz Rezende Pereira |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Renewable Energy
Sustainability and the Environment Computer science 020209 energy 020208 electrical & electronic engineering 02 engineering and technology AC power System of linear equations symbols.namesake Control theory 0202 electrical engineering electronic engineering information engineering symbols Islanding Voltage droop Microgrid Voltage regulation Governor Newton's method |
| Zdroj: | IET Renewable Power Generation. 13:609-617 |
| ISSN: | 1752-1424 1752-1416 |
| Popis: | This study presents two approaches to handling under-frequency regulation in isolated microgrids. The first one is a governor power flow (PF) model in which the generators steady-state governor equations are modeled into a full Newton PF formulation resulting in an augmented sparse linearised system of equations to be solved at each iteration. As a result, it is possible to evaluate the under frequency problem in the case of microgrid islanding as well as to set the reference bus angle to evaluate the possibility of reconnection to the main grid. The second approach presents an optimal PF (OPF) formulation in which the generators governor equations are considered as additional equality constraints to determine the minimum amount of load shedding to keep the system frequency between specified limits. In both methods, it is also used an equation that provides voltage regulation in a droop-based control. The reactive power generation limits in the OPF approach are bounded by a proposed complementarity constraint-based method adapted for the generators' droop-controlled terminal voltage. The proposed approaches are evaluated and validated through the study of the EHV1 Network, a 61-bus 33/11-kV radial distribution system, and the New England test system. |
| Databáze: | OpenAIRE |
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