Can model predictive control improve low-voltage ride-through performance of grid-connected inverters?
Comprehensive evaluation of power quality. This paper proposes a model predictive control (MPC)-based power quality optimization method designed to enhance the low-voltage ride-through (LVRT) capability of grid-connected inverters under various grid voltage sag conditions, while achieving multi-objective power quality optimization.
What is the control design of a grid connected inverter?
The control design of this type of inverter may be challenging as several algorithms are required to run the inverter. This reference design uses the C2000 microcontroller (MCU) family of devices to implement control of a grid connected inverter with output current control.
Can a grid connected inverter be left unattended?
Do not leave the design powered when unattended. Grid connected inverters (GCI) are commonly used in applications such as photovoltaic inverters to generate a regulated AC current to feed into the grid. The control design of this type of inverter may be challenging as several algorithms are required to run the inverter.
How does a grid connected inverter work?
The grid-connected inverter is connected to the power grid through a transformer, as depicted in Fig. 12. Assuming the transformer employs a d1/Y (delta/wye) connection with a turns ratio of 1:1, the phase (or line) voltage at the secondary side leads the phase (or line) voltage at the primary side by 30°. Fig. 12.
How can inverter control features be integrated in the LVRT control scheme?
Experimental results obtained from a 200-W laboratory prototype illustrate how additional control features can be integrated in the inverter control scheme for LVRT. Single-phase instantaneous p-q theory is used for inverter control, and a feed-forward component is added in the control scheme for improved dynamic response.
How can a DC voltage controller improve the safety of an inverter?
By adopting the dc voltage controller which keeps the power balance and dc voltage stabilization, the inverter can operate at constant power (PQ) control mode. During the voltage sag, the proposed multi-objective control strategy is activated to improve the voltage support capability and ensure the safety of the inverter.
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