Exact Linearization Nonlinear Neutral-Point Voltage Control for Single-Phase Three-Level NPC Converters

Cobreces, Santiago; Bordonau, J.; Salaet, J.; Bueno, Emilio; Rodríguez, Francisco

doi:10.1109/tpel.2009.2015221

Cited by 29 publications

(10 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An algorithm using logical comparison for selecting the redundant switch state was applied in [13], which could balance the neutral point voltage. Another balancing strategy to solve the fluctuation is to adjust the duty time of the redundant vector [14]. This method has also been applied to a single-phase multilevel converter [15].…”

Section: Introductionmentioning

confidence: 99%

Smooth Switching Technique for Voltage Balance Management Based on Three-Level Neutral Point Clamped Cascaded Rectiﬁer

Han

et al. 2016

Energies

View full text Add to dashboard Cite

This paper discussed the topology of in the three-level neutral point clamped cascaded rectifier (3LNPC-CR) for designing the Chinese Power Electronic Traction Transformer (PETT). To balance the DC-link voltage (V dc ) in 3LNPC-CR, a smooth switching technique is proposed in this paper. The controlling processes of each module are relatively independent when the proposed technique is applied in 3LNPC-CR. The proposed technique can keep the switching frequency constant and change the switch state smoothly while balancing V dc . The V dc balance ability is analyzed by calculating the unbalance degree of the loads. Simulation and experiment of three-module 3LNPC-CR are built, and then the effectiveness of the proposed technique is verified.

show abstract

Section: Introductionmentioning

confidence: 99%

Smooth Switching Technique for Voltage Balance Management Based on Three-Level Neutral Point Clamped Cascaded Rectiﬁer

Han

et al. 2016

Energies

View full text Add to dashboard Cite

show abstract

“…The switching losses could be controlled by the selection of different commutation states. There are many different PWM strategies for ANPC control by using different zero states and conduction paths [19]. In this section, two PWM strategies are introduced, and a new PWM strategy named ALD is proposed in the next section.…”

Section: Power Unbalance Drawbacks Of Half-bridge Npc Topologymentioning

confidence: 99%

“…Compared with the conventional NPC topology, the total efficiency of the ANPC topology is not improved, but this topology has more switching states freedom degrees, which could be used in dc-bus voltage balancing applications [16]- [19], which is another essential for all NPC topologies. Some of the ANPC PWM strategies were also used for balancing the losses distribution [20], [21], but all of them were not optimal.…”

mentioning

confidence: 99%

A New PWM Strategy for Grid-Connected Half-Bridge Active NPC Converters With Losses Distribution Balancing Mechanism

Kerekes

Rodriguez

et al. 2015

IEEE Trans. Power Electron.

View full text Add to dashboard Cite

Abstract-Photovoltaic systems technological development is driven by the request for higher efficiency and safety. These concerns influence also the choice of the power converter stage. Several topologies have been proposed and many of them are available commercially. Among them, the neutral point clamped (NPC) and derived topologies offers high efficiency, low leakage current, and low EMI. However, one main disadvantage of the NPC inverter is given by an unequal distribution of the losses in the semiconductor devices, which leads to an unequal distribution of temperature that can affect lifetime. By using the active NPC (ANPC) topology, where the clamping diodes are replaced by bidirectional switches, the power losses distribution problem is alleviated. The modulation strategy is a key issue for losses distribution in this topology. In this paper, two known strategies are discussed and a new PWM strategy, namely the adjustable losses distribution is proposed for better losses distribution in the ANPC topology. Simulations and experimental results help in evaluating the modulation strategies.

show abstract

“…Also there are several nonlinear control methods [9][10] to maintain the output voltages balance. Reference [11] describes a new control method based on a simple feedback linearization procedure to obtain a linear time-invariant model for the NP voltage. The feedback linearization process takes almost no time, is direct, and yields a linear, time-invariant model.…”

Section: Introductionmentioning

confidence: 99%

A New Dual Lagrangian Model and Input/Output Feedback Linearization Control of 3-Phase/Level NPC Voltage-Source Rectifier

2014

View full text Add to dashboard Cite

Original scientific paperAn input/output feedback linearization control strategy is developed for control of three-level three-phase neutral-point-clamped rectifier using its dual Lagrangian modeling. The load current of the rectifier can be given in two forms: (i) the load current involving the current of capacitor C1 (ii) the load current involving the current of capacitor C2. Applying the obtained load current to the Euler-Lagrange parameters of the rectifier, two nonlinear models of the system are derived. The models are based on the superposition law of the load current and the Euler-Lagrange description of the rectifier. Also, the two power-balance equations between the input and output sides are obtained by considering the effects of two load currents separately. Then, the two nonlinear models and power-balance equations are linearized using input-output feedback linearization, and the state feedback law controlled inputs are completed by pole placement. With the definition of outputs of the feedback linearization law, the zero dynamics of the system are avoided and a fast output voltages control scheme is designed. Finally, some integrators are added to robust control against parasitic elements. The proposed nonlinear controller is compared to the PI controller and the MATLAB/SIMULINK results verify the proposed control strategy.Key words: Euler-Lagrange (EL) model, 3 level/phase NPC rectifier, Input/output feedback linearization, Powerbalance equations, State feedback law controlled inputs Novi dualni Langrangeov model i upravljanje trofaznim trorazinskim NPC naponskim ispravljačem zasnovano na ulazno/izlaznoj linearizaciji u povratnoj vezi. Upravljačka strategija zasnovana na ulazno/izlaznoj linearizaciji u povratnoj vezi razvijena je za upravljanje trofaznog trorazinskog ispravljača u spoju sa zajedničkom srednjom točkom korištenjem njegova dualnog Lagrangian modeliranja. Struja trošila ispravljača može se prikazati u dvije forme: (i) struja trošila koja uključuje struje obaju kapaciteta C1 (ii) struja trošila koja uključuje samo struju kapaciteta C2. Primjenom dobivene struje trošila na Euler-Lagrangeove parametre ispravljača izvedena su dva nelinearna modela sustava. Modeli su zasnovani na zakonu superpozicije struje trošila i Euler-Lagrangeova opisa ispravljača. Dobivena su dva zakona o ravnoteži snaga izme u ulazne i izlazne strane uzimajući u obzir učinke dvaju struja trošila zasebno. Dva su nelinearna modela i zakoni o ravnoteži snaga zatim linearizirani pomoću ulazno/izlazne linearizacije u povratnoj vezi i ulazi su upravljani s povratnom vezom po varijablama stanja uz metodu odabira polova sustava. Definiranjem izlaza upravljačkog zakona zasnovanog na linearizaciji po povratnoj vezi, zaobišla se dinamika nula u sustavu te je dizajnirana shema s brzim upravljanjem izlaznim naponima. Naposlijetku, integratori su dodani za postizanje robusnosti na parazitske elemente. Predloženi nelinearni regulator uspore en je s PI regulatorom, a rezultati su provjereni u MATLAB/SIMULINK okruženju.Ključne riječ...

show abstract

Exact Linearization Nonlinear Neutral-Point Voltage Control for Single-Phase Three-Level NPC Converters

Cited by 29 publications

References 16 publications

Smooth Switching Technique for Voltage Balance Management Based on Three-Level Neutral Point Clamped Cascaded Rectiﬁer

Smooth Switching Technique for Voltage Balance Management Based on Three-Level Neutral Point Clamped Cascaded Rectiﬁer

A New PWM Strategy for Grid-Connected Half-Bridge Active NPC Converters With Losses Distribution Balancing Mechanism

A New Dual Lagrangian Model and Input/Output Feedback Linearization Control of 3-Phase/Level NPC Voltage-Source Rectifier

Contact Info

Product

Resources

About