Results 11 to 20 of about 13,972,114 (292)
Research on Neutral Point Potential Control Arithmetic for Three-level Invertor
Kongzhi Yu Xinxi Jishu, 2014 It introduced the theory of neutral-point-clamped (NPC) three-level inverter and its PWM method. It analyzed why DC-side capacitors’ voltage fluctuated and proposed the strategy of adding zero-sequence component to every phase modulation wave for ...
LIU Lingling, WANG Weian, CHEN Yifeng
doaj +2 more sources
Comparison between two VSC-HVDC transmission systems technologies : modular and neutral point clamped multilevel converter [PDF]
, 2009 The paper presents a detail comparison between two voltage source converter high voltage dc transmission systems, the first is based on neutral point-clamped (also known as HVDC-Light) and the second is based on innovative modular multilevel converter ...
Anaya-Lara, O. +5 more
core +3 more sources
Study on safety operation of medium voltage distribution network [PDF]
E3S Web of Conferences, 2021 Aiming at the problem of safe operation in the medium voltage distribution network with neutral point grounding through small resistance, the distribution network model was built, and on this basis, MW-level photovoltaic (PV) system, doubly fed Induction
Chen Xiaofang +3 more
doaj +1 more source
IEEE Access, 2019 Three-level neutral-point-clamped (NPC) inverters need to ensure the balance of the neutral-point (NP) potential during operation. The zero-sequence voltage injection balance algorithms based on the carrier-based pulse width modulation (CBPWM) have been ...
Xingda Zhou, Shuai Lu
doaj +1 more source
CES Transactions on Electrical Machines and Systems, 2022 Capacitor voltage imbalance is a significant problem for three-level inverters. Due to the mid-point modulation of these inverter topologies, the neutral point potential moves up or down depending on the neutral point current direction creating ...
Dereje Woldegiorgis, H. Alan Mantooth
doaj +1 more source
A Novel Two-Parameter Modulation and Neutral Point Potential Control Method for The Three-Level Neutral Point Clamped Inverter [PDF]
2007 IEEE International Electric Machines & Drives Conference, 2007 In this work, the neutral point potential (NPP) drift/fluctuation of the three-level neutral point clamped (NPC) inverter is analyzed and a novel control algorithm, the two- parameter PWM method is proposed to confine the NPP variation to a very small range.
Bulent Ustuntepe, Ahmet M. Hava
openaire +1 more source
Particle acceleration in the presence of weak turbulence at an X-type neutral point [PDF]
, 2012 We simulate the likely noisy situation near a reconnection region by superposing many 2D linear reconnection eigenmodes. The superposition of modes on the steady state X-type magnetic field creates multiple X- and O-type neutral points close to the ...
Petkaki, P. +4 more
core +1 more source
Simplified MPC Algorithm of NPC Three-level Inverter Based on SVPWM
Zhejiang dianli, 2022 The traditional control method of the NPC （neural point clamped） three-level inverter is unable to effectively reduce CMV （common-mode voltage） and needs a large calculation quantity because of the zero vector involved modulation or rolling optimization.
QIAN Jinyue +4 more
doaj +1 more source
Energies, 2023 Direct power control (DPC) has gained increasing attention in recent years as a simple and efficient control strategy for pulse width modulation (PWM) rectifiers.
Yajun Zhao, Wenxin Huang, Feifei Bu
doaj +1 more source
Analysis of the influence of zero potential live operation on protection [PDF]
E3S Web of Conferences, 2020 In the case of live working in the distribution network, a live method of live working that satisfies the requirements for personal safety and power supply reliability needs to be studied, because of the serious safety accidents caused by misuse and weak
Yang Qi +4 more
doaj +1 more source