Voltage-Balance Compensator for a Carrier-Based Modulation in the Neutral-Point-Clamped Converter

Zaragoza, Jordi; Pou, Josep; Ceballos, Salvador; Robles, Eider; Jaen, C.; Corbalan, Montserrat

doi:10.1109/tie.2008.2009195

Cited by 145 publications

(64 citation statements)

References 20 publications

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“…In [14], a similar solution for NTV 2 modulation has the same flaws as [9]. An optimized NTV 2 (ONTV 2 ) PWM with closed-loop control [15] can also comprehensively achieve this objective. However, the design of the closed-loop control scheme interfacing the ONTV 2 PWM is not straight forward and this type of compensators does not take into account the instantaneous values of the output currents [16].…”

Section: Introductionmentioning

confidence: 99%

“…However, the design of the closed-loop control scheme interfacing the ONTV 2 PWM is not straight forward and this type of compensators does not take into account the instantaneous values of the output currents [16]. A double-signal pulse width modulation (DSPWM) based on carrier-based modulation using two modulation signals per phase was proposed in [15]. The DSPWM has the same effect as the NTV 2 .…”

Section: Introductionmentioning

confidence: 99%

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A Novel Virtual Space Vector Modulation Strategy for the Neutral-Point Potential Comprehensive Balance of Neutral-Point-Clamped Converters

Zhang¹,

Tang²,

Han³

et al. 2016

Journal of Power Electronics

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A novel Virtual Space Vector (VSV) modulation strategy for complete control of potential neutral point (NP) issues is proposed in this paper. The neutral point potential balancing problems of multi-level converters, which include elimination of low frequency oscillations and self-balancing for NP dc unbalance, are investigated first. Then a set of improved virtual space vectors with dynamic adjustment factors are introduced and a multi-objective optimization algorithm which aims to optimize these adjustment factors is presented in this paper. The improved virtual space vectors and the multi-objective optimization algorithm constitute the novel Virtual Space Vector modulation. The proposed novel Virtual Space Vector modulation can simultaneously recover NP dc unbalance and eliminate low frequency oscillations of the neutral point. Experiment results show that the proposed strategy has excellent performance, and that both of the neutral point potential issues can be solved.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Novel Virtual Space Vector Modulation Strategy for the Neutral-Point Potential Comprehensive Balance of Neutral-Point-Clamped Converters

Zhang¹,

Tang²,

Han³

et al. 2016

Journal of Power Electronics

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“…There are some modulation techniques that are able to completely eliminate the oscillations in NPP [5][6][7]. In [8] a dynamic limiter and a control loop are presented that provide the system with a fast balancing dynamic and guarantee stability under the all operating conditions. Also there are several nonlinear control methods [9][10] to maintain the output voltages balance.…”

Section: Introductionmentioning

confidence: 99%

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

2014

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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...

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“…Other experts have done research on topologies and control strategies utilizing low-voltage DVRs with a three-phase three-wire [6] or a three-phase four-wire [7]. High-voltage DVRs with the neutral-point clamped type [8], flying capacitor type [9] or cascaded type [10] have also been studied. Currently, the industrial application of DVRs is mainly in low-voltage.…”

Section: Introductionmentioning

confidence: 99%

Parameter Optimization of the LC filters Based on Multiple Impact Factors for Cascaded H-bridge Dynamic Voltage Restorers

Chen¹,

Zhu²,

Cai³

2014

Journal of Power Electronics

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The cascaded H-Bridge Dynamic Voltage Restorer (DVR) is used for protecting high voltage and large capacity loads from voltage sags. The LC filter in the DVR is needed to eliminate switching ripples, which also provides an accurate tracking feature in a certain frequency range. Therefore, the parameter optimization of the LC filter is especially important. In this paper, the value range functions for the inductance and capacitance in LC filters are discussed. Then, parameter variations under different conditions of voltage sags and power factors are analyzed. In addition, an optimized design method is also proposed with the consideration of multiple impact factors. A detailed optimization procedure is presented, and its validity is demonstrated by simulation and experimental results. Both results show that the proposed method can improve the LC filter design for a cascaded H-Bridge DVR and enhance the performance of the whole system.

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Voltage-Balance Compensator for a Carrier-Based Modulation in the Neutral-Point-Clamped Converter

Cited by 145 publications

References 20 publications

A Novel Virtual Space Vector Modulation Strategy for the Neutral-Point Potential Comprehensive Balance of Neutral-Point-Clamped Converters

A Novel Virtual Space Vector Modulation Strategy for the Neutral-Point Potential Comprehensive Balance of Neutral-Point-Clamped Converters

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

Parameter Optimization of the LC filters Based on Multiple Impact Factors for Cascaded H-bridge Dynamic Voltage Restorers

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