Microturbine Control Modeling to Investigate the Effects of Distributed Generation in Electric Energy Networks

Abstract

The great attention of research initiatives to sustainable energy systems calls for contributions in modeling new small size generation plants exploiting innovative technologies. In such a context, the paper presents detailed models of the components and controls forming the thermo-mechanical and electric subsystems of a microturbine power plant. The modeled thermo-mechanical subsystem includes different control loops: a speed controller for primary frequency control (droop control), an acceleration control loop, which limits the rotor acceleration in case of sudden loss of load or in case of start-up, and a controller to limit the temperature of the exhaust gases below the maximum admissible temperature. The modeling of control schemes in the electric subsystem is another key issue of the paper in view of providing efficient energy production from distributed generation: an active power-voltage (PV) control is adopted for the inverter in case of the operation of a microturbine connected to the grid. This control scheme provides an innovative contribution with respect to the usually adopted active power-reactive power (PQ) control scheme. The adoption of the PV control scheme allows to evaluate the contribution of microturbines to voltage support in electric distribution grids. In case of isolated operation of the generation source a voltage-frequency (VF) control scheme is proposed. A test grid is set up for model validation and the simulation results are described and discussed

Impact of Distributed Generations With Energy Storage Devices on the Electric Grid

“…Dynamic modeling and simulation are needed to assess the impact [11], [12]. Researchers have presented the microturbine modeling and impact of DG's and power management through control strategy using STATCOM [13], [14]. Effect of nonlinear loads on electric grid with DG was studied in [15].…”

A prospective on modeling and performance analysis of micro-turbine generation system

“…The detailed model of the components and controls forming the thermo-mechanical and electric subsystems of a microturbine power plant is presented in [17]. The modeled thermomechanical subsystem includes different control loops: a speed controller for primary frequency control (droop control), an acceleration control loop, which limits the rotor acceleration in case of sudden decrease of load or in case of start-up.…”

Biogas production from grape pomace: Thermodynamic model of the process and dynamic model of the power generation system

“…Based on the above considerations, the microturbine engine dynamics can by modelled as a conventional small gas turbine. The dynamic model of a combustion gas turbine is widely discussed in [12,13]. In this research, a simplified single shaft gas microturbine and all its control systems have been implemented to represent its dynamics.…”