A Novel Line Current Control Strategy to Control the Real Power Flow at PCC using H-bridge Inverter

Abstract

<p class="abstract">This paper presents the power flow control between the main grid and the microgrid in low-voltage distribution network using H-bridge inverter. Controlling the real power flow in the line using the H-bridge inverter is investigated by implementing the line current control strategy. The feasibility of the proposed H-bridge inverter and its control strategy is validated by varying the line current reference. Hence, the H-bridge inverter will operate in its inductive or capacitive operation mode depending on the reference current value and the output of the PI controller in the control unit. The control strategy of the microgrid distributed generators has also been investigated in which P/V droop characteristics is applied to the power control of each DG in the microgrid. The effectiveness of the proposed approaches is validated through simulations. </p>

A performance comparison of series power flow control structures in a smart microgrid

“…Indeed, the reference current magnitude (𝐼 𝑟𝑒𝑓 ) supported by system operator can control the series power-flow controller operation. This means that the magnitude of line current will not follow the reference value of the current [23]. The reference current is responsible only of injecting series voltage into system grid.…”

“…A new control methodology has been evolved to run the H-bridge inverter as a power flow controller between the main network and the microgrid [22]. A control method for the line current has also been applied on the same H-bridge inverter which is developed in [23] to control the real power transfer between a grid connected-microgrid. A new active power control method in the stationary reference frame has been applied on a series visual studio code (VSC) which represents an H-bridge inverter to regulate the transfer of active power at the interface point [24].…”

Demand side management in a microgrid to reduce the peak consumption cost

“…If the load consumption or the generated value is underestimated, the grid operation and stability can be dangerous due to an in-line insufficient rotation reserve. If the load consumption and the generated value are overestimated, a large number of units are sent and operating costs increase [2]. Therefore, the demand side management (DSM) on the demand side plays the interface between the microgrid and the end user.…”