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Variation of wind power affects the stability of a multi-terminal HVDC (MT-HVDC) system installed in the purpose of integrating offshore wind farms and supplying an offshore constant power load in oil and gas plat form. This paper investigates the stability of such MT-HVDC system. In order to determine the stability, an impedance-based stability method is adopted. The stability is determined by checking...
The impedance modeling of modular multilevel converters (MMCs) is a prerequisite for applying the impedance-based stability analysis method to an MMC-based high-voltage direct current (MMC-HVDC) transmission system. The objective of this paper is to develop impedance models of a three-phase MMC in order to assess its stability. The analytical ac-side and dc-side impedance models of the three-phase...
This paper deals with the problem of trajectory tracking of a class of power converters. To analyze the stability of these systems we consider the bilinear structure they admit. First, we propose the theoretical framework for which it is possible to ensure global tracking of trajectories. To do so, a construction of an output signal respect to which the incremental model becomes passive is carried...
This article investigates how power electronic interfaces for loads provide reactive power in case of abnormal voltage conditions. An evaluation of voltage support is done for different values of voltage sags when the power electronic interface provides with reactive current. The stability margins of the distributed system are investigated for different types of loads and it is proved that the higher...
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