Results 31 to 40 of about 265,688 (306)

Tripping of circuit breakers in PV installations due to zero sequence field impedance [PDF]

, 2011
On the roof of a wool processing company a 385 kWp PV installation is installed. When production of the installation is more than 60% of the rated power the circuit breaker trips.
Debruyne, Colin, Desmet, Jan, Vandevelde, Lieven, Verhelst, Bart   +3 more
core   +2 more sources

Branch Voltage Balancing Control Strategy Based on the Transfer Power Model by Zero-Sequence Circulating Current for the Hexverter

IEEE Access, 2022
This paper proposes a novel branch voltage-balancing control strategy for a hexagonal converter (Hexverter). First, the state-space model based on the double-dq transformation is analyzed in-depth along with the necessary basic mathematical derivation ...
Yang Yi, Gang Yang, Chong Qian, Yaojie Gui   +3 more
doaj   +1 more source

High-impedance faulty feeder detection for cross-country faults in distribution networks based on zero-sequence active power regulation

International Journal of Electrical Power & Energy Systems
The weak characteristics of high-impedance faults and the complex attributes of cross-country faults make faulty feeder detection of cross-country high-impedance faults difficult in medium-voltage networks. This paper deduces the zero-sequence equivalent
Yuting Lan, Kun Yu, Xiangjun Zeng, Rong Cai, Qingbo Deng, Chenyu Wu, Shigeng He, Shijie Xu, Youcheng Jia   +8 more
doaj   +1 more source

Mathematical description of the method for ungrounded AC systems to determine the network insulation

IET Generation, Transmission & Distribution, 2022
For the safety of humans and animals in the vicinity of single‐phase earth faults in ungrounded AC systems, the development of methods for monitoring the condition of insulation and protection against electric shocks is an important issue.
Iskander Kurabayev, Ivan Suvorov, Arman Utegulov, Galina Tatkeyeva   +3 more
doaj   +1 more source

Battery storage integration in voltage unbalance and overvoltage mitigation control strategies and its impact on the power quality [PDF]

, 2019
The increased utilisation of distributed renewable energy sources in low voltage grids leads to power quality problems such as overvoltages and voltage unbalance.
Al-Rubaye, Mohannad Jabbar Mnati, Bozalakov, Dimitar, Desmet, Jan, Laveyne, Joannes, Vandevelde, Lieven   +4 more
core   +1 more source

A Carrier-Based Modulation With Planned Zero Sequence Voltage Injection to Control Neutral Point Voltage for Three-Level Inverter [PDF]

IEEE Access, 2020
In this paper, a carrier-based modulation strategy with planned zero sequence voltage (ZSV) injection for T-type three-level inverter (TLI) is proposed to control neutral point (NP) voltage, which is simple to be implemented. This strategy is analyzed comprehensively based on the relationship between NP current and the injected ZSV in one switching ...
JinPing Wang, Zaiyi Gui, Peixia Wang, Juncan Wang, Weidong Jiang   +4 more
openaire   +2 more sources

Simplified Cluster Voltage Balancing Control Based on Zero-Sequence Voltage Injection for Star-Connected Cascaded H-Bridge STATCOM

CSEE Journal of Power and Energy Systems
The cluster DC voltage balancing control adopting zero-sequence voltage injection is appropriate for the star-connected cascaded H-bridge STATCOM because no zero-sequence currents are generated in the three-phase three-wire system.
Kai Hu, Guoliang Zhao, Daorong Lu, Zhengang Lu, Nianwen Xiang, Shulai Wang, Jintian Lin   +6 more
doaj   +1 more source

A Novel Fault-Tolerant Control of Modular Multilevel Converter under Sub-Module Faults based on Phase Disposition PWM

Energies, 2018
Each arm of modular multilevel converter (MMC) consists of a large number of sub-module (SM) units. However, it also increases the probability of SM failure during the long-term system operation. Focusing on the fault-tolerant operation issue for the MMC
Yin Jingyuan, Wen Wu, Wei Tongzhen, Wu Xuezhi, Huo Qunhai   +4 more
doaj   +1 more source

Impedance Modeling and Stability Analysis of Three-Phase Four-Leg Grid-Connected Inverter Considering Zero-Sequence

IEEE Access, 2021
With the increasing applications of grid-connected voltage source converters, it is important to analyze the impedance characteristic of the grid-connected system to implement the stability analysis of the grid connection operation.
Heng Nian, Yuming Liao, Meng Li, Dan Sun, Yunyang Xu, Bin Hu   +5 more
doaj   +1 more source

FPGA Implementation of a General Space Vector Approach on a 6-Leg Voltage Source Inverter [PDF]

, 2011
A general algorithm of a Space Vector approach is implemented on a 6-leg VSI controlling a PM synchronous machine with three independent phases. In this last case, the necessity of controlling the zero-sequence current motivates the choice of a special ...
BRUYERE, Antoine, CENSE, Sébastien, COLAS, Frédéric, IDKHAJINE, Lahoucine, KESTELYN, Xavier, SANDULESCU, Paul, SEMAIL, Eric   +6 more
core   +6 more sources