Zobrazeno 1 - 10
of 378
pro vyhledávání: '"DC-AC POWER CONVERTORS"'
Publikováno v:
IET Generation, Transmission & Distribution, Vol 18, Iss 23, Pp 3851-3862 (2024)
Abstract This paper presents a nonlinear higher‐order sliding mode control (HO‐SMC) designed for a droop control‐based grid‐forming converter. In weak grid scenarios, where the rate of change of frequency is notably high, achieving a rapid fr
Externí odkaz:
https://doaj.org/article/0b9a8f2d80d7488782ef5ca4b3fb9ba5
Publikováno v:
IET Renewable Power Generation, Vol 18, Iss 16, Pp 3788-3797 (2024)
Abstract This article proposes a method for evaluating the dominant factors of grid‐connected inverters based on impedance models, which can achieve quantitative calculation of the dominant factors of system stability. First, an impedance model was
Externí odkaz:
https://doaj.org/article/7e61ebbb2e194756b1140e8680c46f26
Publikováno v:
IET Generation, Transmission & Distribution, Vol 18, Iss 22, Pp 3633-3645 (2024)
Abstract The grid‐connection of high‐permeability new energy through voltage‐source converters (VSCs) brings new oscillation risks to the power system, which seriously threatens the stable operation of the system. Therefore, an evaluating metho
Externí odkaz:
https://doaj.org/article/f4ff93840e6f43ae9f9b1032d49ff028
Publikováno v:
IET Power Electronics, Vol 17, Iss 15, Pp 2416-2427 (2024)
Abstract This article introduces a novel integrated nearest level controller (NLC) combined with selective harmonic mitigation (SHM) control approach aimed at efficiently suppressing lower‐order harmonics has been introduced. The proposed methodolo
Externí odkaz:
https://doaj.org/article/0ae644f631e041f8a7764ce58e99f860
Publikováno v:
IET Power Electronics, Vol 17, Iss 15, Pp 2369-2379 (2024)
Abstract Three‐phase four‐leg inverters are widely used in power systems due to their inherent ability to handle unbalanced loads. However, with conventional 3D space vector pulse width modulation (3D‐SVPWM), high harmonics of large amplitude e
Externí odkaz:
https://doaj.org/article/0befd665888746fba498545e85320f5d
Publikováno v:
IET Power Electronics, Vol 17, Iss 15, Pp 2358-2368 (2024)
Abstract Modulation strategy plays a key role in the operation of modular multilevel converters (MMC). Although many studies have been carried out on its optimization in MMC, the limitations of hardware implementation are seldom considered. This pape
Externí odkaz:
https://doaj.org/article/1a68f00296e0478987e5ba475a608bb8
Publikováno v:
IET Power Electronics, Vol 17, Iss 15, Pp 2344-2357 (2024)
Abstract To reduce the common‐mode voltage (CMV) generated during the operation of the three‐level neutral‐point‐clamped (3L‐NPC) inverters, this study proposes a partitioned hybrid pulse width modulation (PHPWM) strategy. In this strategy,
Externí odkaz:
https://doaj.org/article/f1cc1cf6ea5b4baeb0bb59f13b998afc
Publikováno v:
IET Power Electronics, Vol 17, Iss 14, Pp 1820-1829 (2024)
Abstract This paper presents an innovative adaptive strategy implemented in wireless power transmission (WPT) systems to overcome efficiency challenges due to coupling structure misalignment and load variability. A novel versatile transmitter, capabl
Externí odkaz:
https://doaj.org/article/948f04ae72cc4364870fb4be76112121
Publikováno v:
IET Power Electronics, Vol 17, Iss 14, Pp 1830-1839 (2024)
Abstract Under the condition of weak grid, the phase‐locked loop (PLL) is one of the main reasons for the sub‐synchronous oscillation of the grid‐connected inverter. Therefore, it is necessary to identify the PLL parameters of the grid‐connec
Externí odkaz:
https://doaj.org/article/bc8f2f13f21f4273b013f7fd2e157179
Publikováno v:
IET Power Electronics, Vol 17, Iss 14, Pp 1882-1892 (2024)
Abstract The active power control of photovoltaic (PV) inverters without energy storage can flatten the fluctuating power and support the voltage amplitude and frequency of the grid. When operated in grid‐forming voltage‐control mode, because the
Externí odkaz:
https://doaj.org/article/9d17949f29124d9f8e655b71f1d609f4