Results 11 to 20 of about 441,873 (190)

Development of a Novel Control Scheme to Achieve the Minimum Unbalance Factor and Real Power Fluctuations under Asymmetrical Faults

Energies, 2023
The increasing share of converter-based renewable energy sources in the power system has forced the system operators to demand voltage support from the converters in case of faults.
Muhammad Abubakar, Herwig Renner, Robert Schürhuber   +2 more
doaj   +1 more source

Analysis of unbalanced clustered voltage and control strategy of clustered voltage balancing for cascaded H-bridge STATCOM

Journal of Modern Power Systems and Clean Energy, 2019
To explore the clustered voltage balancing mechanism of the cascaded H-bridge static synchronous compensator (STATCOM), this paper analyzes the causes of unbalanced clustered voltage. The negative-sequence current caused by the compensation of unbalanced
Yu Jin, Jianze Wang, Yiqi Liu, Xinagyu Sai, Yanchao Ji   +4 more
doaj   +1 more source

Power Capability Boundaries for an Inverter Providing Multiple Grid Support Services

Energies, 2020
It is getting more common every day to install inverters that offer several grid support services in parallel. As these services are provided, a simultaneous need arises to know the combined limit of the inverter for those services. In the present paper,
Markel Zubiaga, Alain Sanchez-Ruiz, Eneko Olea, Eneko Unamuno, Aitor Bilbao, Joseba Arza   +5 more
doaj   +1 more source

Negative-Sequence Current Capability in Low-Capacitance Cascaded H-Bridge Static Compensators With Optimal Third- Harmonic Circulating Current Injection

IEEE Transactions on Power Electronics, 2023
The cascaded H-bridge (CHB) low-capacitance static compensator (LC-StatCom) has a limited negative-sequence current injection capability compared to a conventional CHB StatCom, due to the comparatively larger oscillations on the capacitor voltages. Placing limits on the ability to provide negative-sequence current to the grid for a given capacitor size
Ezequiel Rodriguez Ramos, Ramon Leyva, Glen G. Farivar, Christopher D. Townsend, Josep Pou   +4 more
openaire   +2 more sources

Investigation of negative sequence injection capability in H-bridge multilevel STATCOM [PDF]

, 2014
The aim of this paper is to investigate the ability of star- and delta-connected H-bridge multilevel STATCOMs to exchange negative-sequence current with the grid. Zero-sequence injection is utilized for capacitor voltage balancing.
Behrouzian, Ehsan, Bongiorno, Massimo, Zelaya, Hector   +2 more
core   +1 more source

A new family of diverse skin peptides from the microhylid frog genus phrynomantis [PDF]

, 2020
A wide range of frogs produce skin poisons composed of bioactive peptides for defence against pathogens, parasites and predators. While several frog families have been thoroughly screened for skin-secreted peptides, others, like the Microhylidae, have ...
Ballet, Steven, Martel, An, Martin, Charlotte, Pasmans, Frank, Raaymakers, Constantijn, Roelants, Kim, Stijlemans, Benoit, Zaman, Shabnam   +7 more
core   +1 more source

Sequence Control Strategy for Grid-Forming Voltage Source Converters Based on the Virtual-Flux Orientation under Balanced and Unbalanced Faults

Energies, 2023
Renewable power generation has increased in recent years, which has led to a decrease in the use of synchronous generators (SGs). These power plants are mainly connected to the power system through electronic converters.
Juan Dolado Fernández, Joaquín Eloy-Garcia, Santiago Arnaltes, Jose Luis Rodríguez-Amenedo   +3 more
doaj   +1 more source

A comparative study of methods for estimating virtual flux at the point of common coupling in grid connected voltage source converters with LCL filter [PDF]

, 2016
Grid connected Voltage Source Converters (VSCs) with LCL filters usually have voltage measurements at the filter capacitors, while it can be important to control the active or reactive power injection at the grid-side of the LCL filter, for instance at a
Candela García, José Ignacio, Luna Alloza, Álvaro, Rocabert Delgado, Joan, Rodríguez Cortés, Pedro, Roslan, Nurul Fazlin, Suul, Jon Are   +5 more
core   +1 more source

Control of a Modular Multi-level Converter STATCOM for Low Voltage Ride-Through Condition [PDF]

, 2016
This paper presents a simulation study on the implementation of the Single Star Flying Capacitor Converter Modular Multi-level Cascaded Converter (MMCC-SSFCC) as a STATCOM operating under voltage sag condition.
Oghorada, OJK, Zhang, L
core   +2 more sources

Unbalanced and Reactive Load Compensation Using MMCC-Based SATCOMs With Third-Harmonic Injection [PDF]

, 2019
Modular multilevel cascaded converter-based STATCOMs are scalable to higher voltages without requiring a step-up transformer with multiple windings and can be realized using a low switching frequency, giving lower harmonic content and hence a reduced ...
Oghorada, OJK, Zhang, L
core   +1 more source