Abstract
Diesel generators (DGs) are used to provide electrical power to consumers because their power outputs can be scheduled, and they offer stable operating characteristics in a standalone or microgrid system. The parameters for DGs are set to ensure reliable and accurate simulation for distributed energy resources (DERs), which increases system reliability, maintains power supply quality and reduces operational costs. There are many parameters that must be estimated for a DG. These parameter settings such as system gains and time constants may vary, as facilities are run for a few days. Parameters for a DG must then be re-estimated to ensure accurate simulation in a microgrid system. The proposed method uses a sensitivity analysis to classify parameters into three different categories. A hierarchical optimization method combined with an enhanced whale optimization algorithm (EWOA) is then used to estimate the parameter settings for a DG using actual measurement data. The proposed method is applied to a practical microgrid system, and the results show that the proposed method determines the optimal parameter settings for a DG that enables accurate simulation and robust implementation for a microgrid system.
Highlights
The rapid development of smart grids means that regional grids or microgrids are becoming increasingly common
A microgrid is mainly composed of a static switch that is connected to the utility grid, an energy storage system (ESS), an energy management system, a load demand and distributed energy resources (DERs) such as solar photovoltaic (PV) arrays, fuel cells, wind turbines, micro gas turbines (MGTs) and diesel generators (DGs)
This system is composed of an ESS, MGT, PV array, wind turbine (WT), DG, loads and an energy management system that controls DERs to meet the requirements of power consumers
Summary
The rapid development of smart grids means that regional grids or microgrids are becoming increasingly common. A microgrid is mainly composed of a static switch that is connected to the utility grid, an energy storage system (ESS), an energy management system, a load demand and distributed energy resources (DERs) such as solar photovoltaic (PV) arrays, fuel cells, wind turbines, micro gas turbines (MGTs) and diesel generators (DGs). DGs are stable, robust and costeffective, and their power outputs can be efficiently controlled, but they are fuel-consuming, noisy and produce much pollution. A properly designed DG can meet the specific power needs of consumers and has become the most commonly used power source for DERs. The parameter settings for a DG must allow reliable simulation of a DER, ensure the stability of the system, maintain. The parameter settings must be re-estimated to allow for successful control, identification, stability analysis and accurate simulation in microgrids. Since DGs have many parameters to be determined, it is essential to use an efficient method for optimal parameter estimation
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