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In this paper, an islanded medium-voltage (MV) microgrid placed in Dongao Island is presented, which integrates renewable-energy-based distributed generations (DGs), energy storage system (ESS), and local loads. In an isolated microgrid without connection to the main grid to support the frequency, it is more complex to control and manage. Thus, in order to maintain the frequency stability in multiple...
In an autonomous microgrid without connection to the interconnected grid to support the frequency and voltage, it is more complex to control and manage. Thus in order to investigate the dynamic stability of the medium-voltage (MV) microgrid in Dongao Island, a detailed small-signal state-space model of the autonomous MV mixed-source microgrid containing diesel generator set (DGS), grid-supporting...
In this paper, an autonomous medium-voltage (MV) microgrid placed in Dongao Island is presented, which integrates renewable-energy-based distributed generations (DGs), energy storage systems (ESS), and local loads. In an autonomous microgrid without connection to the main grid to support the frequency, it is more complex to control and manage. Therefore, in order to maintain the frequency stability...
The increasing penetration of distributed generation (DGs) in distribution network promotes the development of microgrid. As important DG unit in isolated medium-voltage (MV) microgrid, the operating characteristics of the double fed induction generator (DFIG) have a crucial effect on microgrid stability. This paper analyzes the operating characteristics of DFIG in microgrid. Considering the constraint...
In this paper, a new space vector modulation (SVM) strategy is presented to reduce the output common-mode voltage (CMV) for direct matrix converters. This method modifies the traditional singular value decomposition modulation to enable the usage of switch vectors with 120° phase shift, then substitutes two of the corresponding switch states by an orientation switch state which connects every input...
This paper proposes an optimal sizing and control strategy for islanded microgrid, consisting of renewable energy sources such as wind turbine generators (WT) and solar photovoltaic generators (PV), diesel generators (DE) and battery storage system (BS). The problem is formulated to minimize the annualized system cost (ASC) based on a control strategy with two modes. In mode 1, BS is the main power...
Modeling on the dynamic behavior of wind farm accurately is the premise of studying the impact of large-scale wind power integrated into power system. Considering the difference problem of wind speed because of complex terrain and wind turbine units arranged irregularly in large wind farm, long-time scale measured data is chosen to be the cluster-dependent index. The wind turbine generators are divided...
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