WeQing State Grid Module

Is there a modular state-space modeling framework for grid-connected voltage-source converters?

Abstract: This article proposes a modular state-space modeling framework for grid-connected voltage-source converters, where the different control loops, including the ac current control, the phase-locked loop, the dc-link voltage control, and the ac voltage magnitude control, can be modeled separately as building blocks.

How can simulation improve the stability of a power grid?

Through simulation, the purpose of optimizing the uncertain model, restraining voltage distortion, and balancing output power was achieved and ensured the stability of the power grid.

What is the state-space model for a multi-inverter system?

In this paper, the explicit state-space model for a multi-inverter system including grid-following inverter-based generators (IBGs) and grid-forming IBGs is developed by the two-level component connection method (CCM), which modularized inverter control blocks at the primary level and IBGs at the secondary level.

Can smart microgrid systems improve power quality under nominal conditions?

Smart microgrid systems need to consider more dynamic, complex external interference and uncertain input factors to be able to respond to the needs of practical engineering. Therefore, the improvement of power quality under nominal conditions has limitations.

What is the critical point and stability margin for grid-forming inverters?

However, the critical point and stability margin for grid-forming inverters have not been clearly defined. Additionally, most of the converter-driven power system stability analyses are based on single machine infinite bus (SMIB) scenario, where the system is equivalent to a voltage source with impedances behind.

Are grid-forming inverters stable in a stiff grid?

In contrast, previous experiments in and numerical analysis in show that grid-forming inverters gradually exhibit worse stability in stiff grid. This is logically reasonable as in the extreme circumstance that voltage- controlled grid-forming inverters cannot manipulate voltage at the infinite bus .