New Modulation Strategy to Balance the Neutral-Point Voltage for Three-Level Neutral-Clamped Inverter Systems

Choi, Ui-Min; Lee, June-Seok; Lee, Kyo‐Beum

doi:10.1109/tec.2013.2293502

Cited by 134 publications

(51 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Multilevel inverters have received tremendous attention, especially in medium and high voltage applications, due to their appealing features in providing high quality output voltage with negligible distortion, minimum harmonic contents and minimum switching losses [72,94]. Nowadays, it is very difficult to apply a single power semiconductor switch directly to high or even medium voltage networks.…”

Section: Operation Of Sapfs With Multilevel Inverters As Circuit Topomentioning

confidence: 99%

“…A better alternative is proposed in [72,106,111] where the dwell time of N-type and P-type small vectors are adjusted in response to imbalance of DC-link capacitor voltage. The proposed method can be referred as an adaptive DTA technique, and it is effective against various types of voltage imbalance conditions and does not require any complex switching sequence design.…”

Section: Control Algorithms Of Multilevel Inverter-based Sapfmentioning

confidence: 99%

See 1 more Smart Citation

Control Algorithms of Shunt Active Power Filter for Harmonics Mitigation: A Review

et al. 2017

View full text Add to dashboard Cite

Current harmonics is one of the most significant power quality issues which has attracted tremendous research interest. Shunt active power filter (SAPF) is the best solution to minimize harmonic contamination, but its effectiveness is strictly dependent on how quickly and accurately its control algorithms can perform. This manuscript reviews various types of existing control algorithms which have been employed for controlling operation of SAPF. Harmonic extraction, DC-link capacitor voltage regulation, current control and synchronizer algorithms are examined and discussed. The most relevant techniques which have been applied for each control algorithm are described and contrasted in an organized manner to identify their respective strengths and weaknesses. It is found that the applied control algorithms differ in two conditions: (1) the condition where harmonic current distortion is treated by the SAPF in the presence of non-ideal source voltage; and (2) the condition where multilevel inverter is employed as the circuit topology of SAPF.

show abstract

Section: Operation Of Sapfs With Multilevel Inverters As Circuit Topomentioning

confidence: 99%

Section: Control Algorithms Of Multilevel Inverter-based Sapfmentioning

confidence: 99%

Control Algorithms of Shunt Active Power Filter for Harmonics Mitigation: A Review

et al. 2017

View full text Add to dashboard Cite

show abstract

“…The control method, depending on the hardware circuitry, will increase system costs, and become more complicated. (2) Ameliorate the control strategy based on CBPWM and SVPWM [18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

“…By adopting CBPWM, three different methods are designed to balance the NPP by common mode voltage (CMV) injection, and the balance abilities of each method are compared in [18]. A proposed modulation replaces the P-type or N-type small switching states with other switching state to balance the NPP in [23], however, this method increase the switching events and output total harmonic distortion. SVPWM adjusts the application time of the redundant space vectors to balance the NPP, but the control effect of this method is not satisfactory [19].…”

Section: Introductionmentioning

confidence: 99%

A Hybrid Modulation Strategy with Reduced Switching Losses and Neutral Point Potential Balance for Three-Level NPC Inverter

Jiang¹,

Gao²,

Wang³

et al. 2017

Journal of Electrical Engineering and Technology

View full text Add to dashboard Cite

-In this paper, carrier-based pulse width modulation (CBPWM), space vector PWM (SVPWM) and reduced switching losses PWM (RSLPWM) for the three-level neutral point clamped (NPC) inverter are introduced. In the case of the neutral point (NP) potential (NPP) offset, an asymmetric disposition PWM (ASPDPWM) strategy is proposed, which can output PWM sequences correctly and suppress the lower order harmonics of the inverter effectively. An NPP balance strategy based on carrier based PWM (CBPWM) is analyzed. A hybrid modulation strategy combining RSLPWM and the NPP balance based on CBPWM is proposed, and hysteresis control is adopted to switch between the two modulation strategies. An experimental prototype of the three-level NPC inverter is built. The effectiveness of the hybrid modulation is verified with a resistance-inductance load and a permanent magnetic synchronous motor (PMSM) load, respectively. The experimental results show that reduced switching losses and an acceptable NPP can be effectively achieved in the hybrid modulation strategy.

show abstract

“…For example, zero-sequence voltage injection methods have been proposed in [2], [7], Ref. [3], [5] propose improved space vector modulation (SVM) methods to reduce the neutral-point voltage unbalancing. In addition, they correctly select other vectors, which do not impact on the neutral-point voltage, to replace the small vectors.…”

Section: Introductionmentioning

confidence: 99%

A New DPWM Method to Suppress the Low Frequency Oscillation of the Neutral-Point Voltage for NPC Three-Level Inverters

Lyu¹,

Hu²,

Wu³

et al. 2015

Journal of Power Electronics

View full text Add to dashboard Cite

In order to suppress the low frequency oscillation of the neutral-point voltage for three-level inverters, this paper proposes a new discontinuous pulse width modulation (DPWM) control method. The conventional sinusoidal pulse width modulation (SPWM) control has no effect on balancing the neutral-point voltage. Based on the basic control principle of DPWM, the relationship between the reference space voltage vector and the neutral-point current is analyzed. The proposed method suppresses the low frequency oscillation of the neutral-point voltage by keeping the switches of a certain phase no switching in one carrier cycle. So the operating time of the positive and negative small vectors is equal. Comparing with the conventional SPWM control method, the proposed DPWM control method suppresses the low frequency oscillation of the neutral-point voltage, decreases the output waveform harmonics, and increases both the output waveform quality and the system efficiency. An experiment has been realized by a neutral-point clamped (NPC) three-level inverter prototype based on STM32F407-CPLD. The experimental results verify the correctness of the theoretical analysis and the effectiveness of the proposed DPWM method.

show abstract

New Modulation Strategy to Balance the Neutral-Point Voltage for Three-Level Neutral-Clamped Inverter Systems

Cited by 134 publications

References 15 publications

Control Algorithms of Shunt Active Power Filter for Harmonics Mitigation: A Review

Control Algorithms of Shunt Active Power Filter for Harmonics Mitigation: A Review

A Hybrid Modulation Strategy with Reduced Switching Losses and Neutral Point Potential Balance for Three-Level NPC Inverter

A New DPWM Method to Suppress the Low Frequency Oscillation of the Neutral-Point Voltage for NPC Three-Level Inverters

Contact Info

Product

Resources

About