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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...
A two inverter microgrid, where each inverter uses droop control to share the network load, was simulated to investigate the recovery time after the clearance of a fault. A simple microgrid of only two inverters was used to understand interactions between different parameters within the microgrid after a fault had been cleared. Upon successful verification, a more complex microgrid could be used to...
It is known that active rectifier loads present a negative incremental resistance and have control loop dynamics similar to inverters that may supply a microgrid. To investigate this, a small-signal model of an active rectifier load within a microgrid is developed. The active rectifier load and microgrid are modeled in the synchronous (DQ) reference frame. A participation analysis of the model is...
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