A Transformerless 6.6-kV STATCOM Based on a Hybrid Cascade Multilevel Converter Using SiC Devices

Koyama, Yuko; Nakazawa, Yosuke; Mochikawa, Hiroshi; Kuzumaki, Atsuhiko; Sano, Kenichiro; Okada, Naotaka

doi:10.1109/tpel.2017.2770143

Cited by 40 publications

(10 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The decoupled current control based on dq rotating frame is used in this paper as shown in Figure 5. Note that the current control method has been widely discussed such as in (Liming Liu et al, 2015), (Koyama et al, 2018), it will be only reviewed briefly to facilitate the design of lower layer controller. According to Figure 5, the active and reactive current reference i d * and i q * can be respectively derived from the grid active and reactive power dispatch P* and Q*.…”

Section: Hierarchical Power Allocation Control Hierarchical Control For the Battery-sc Hessmentioning

confidence: 99%

See 1 more Smart Citation

Hierarchical Power Allocation Control for Star-Connected Hybrid Energy Storage System Using Cascaded Multilevel Converters

Liu

Lyu

et al. 2021

Front. Energy Res.

View full text Add to dashboard Cite

Hybrid energy storage system (HESS) using cascaded multilevel converters (CMC) has received increasing attention due to its merits on smoothing power fluctuations for renewable energy systems (RESs). However, CMC-based HESS still faces tough challenges due to asymmetrical ac power distribution. In this paper, hierarchical power allocation control strategy is utilized in CMC-based star-connected HESS to coordinate power between batteries and supercapacitors (SCs). Using the proposed power allocation mechanism, energy management strategy (EMS) with two operation modes can be achieved, which includes SC voltage regulation mode and power compensation mode. In SC voltage regulation mode, SC voltages are regulated to achieve long-term stable operation. Power compensation mode aims to allocate the active power fluctuation and employs SCs to mitigate it. Meanwhile, the principle of the hierarchical power allocation strategy is analyzed to facilitate the accurate control and flexible switching of different operation modes. A series of simulation and experiment tests are executed to demonstrate the performance of the proposed control strategy.

show abstract

Section: Hierarchical Power Allocation Control Hierarchical Control For the Battery-sc Hessmentioning

confidence: 99%

“…Details of the asymmetrical power allocation are described in the following subsection. In addition, interphase and cluster balancing control are respectively utilized for batteries and SCs (Maharjan et al, 2009;Liu et al, 2012;Koyama et al, 2018).…”

Section: Hierarchical Power Allocation Control Hierarchical Control For the Battery-sc Hessmentioning

confidence: 99%

Hierarchical Power Allocation Control for Star-Connected Hybrid Energy Storage System Using Cascaded Multilevel Converters

Liu

Lyu

et al. 2021

Front. Energy Res.

View full text Add to dashboard Cite

show abstract

“…Since the highest voltage rating of Si IGBT is 6.5kV [41], it is possible to realize higher voltage rating and high-power density applications by using SiC devices instead of Si devices in series. Thus, to optimize the comprehensive utilization of different semiconductor devices, hybrid power stage for medium-voltage system both applying Si and SiC devices has been studied and employed in [42] and [43], which fully utilize the low-switching-loss advantages of SiC devices and the low-cost advantages of Si devices.…”

Section: ⅵ Extension To High Power Applicationsmentioning

confidence: 99%

Floquet-Theory-Based Small-Signal Stability Analysis of Single-Phase Asymmetric Multilevel Inverters With SRF Voltage Control

Han

Lin

et al. 2020

IEEE Trans. Power Electron.

View full text Add to dashboard Cite

This paper proposes a small-signal model and Floquet theory-based method for analyzing small-signal stability of a single-phase asymmetric cascaded H-bridge multilevel inverter (ACHMI) operating in stand-alone mode. The studied ACHMI system consists of the power stage and cascaded control loops, which includes the voltage loop in the synchronous reference frame (SRF), capacitor current feedback control and hybrid modulation scheme. Due to the SRF voltage control, the derived small-signal model under linear and nonlinear load conditions are inherently periodically time-variant. Therefore, the Floquet theory is employed to analyze the stability regions of the dualloop control parameters of the ACHMI. Furthermore, the loci and moduli of Floquet multipliers are calculated to accurately evaluate the respective effects of control parameters on the stability of the system. With the stability analysis based on the small-signal model and Floquet theory-based method, an effective selection range of control parameters of the multilevel inverter can be obtained. Finally, the experimental results from a reduced-scale laboratory prototype ACHMI are presented to validate the theoretical analysis, and the effectiveness of proposed analysis method in high-power applications is verified by the simulation results from a 10kV medium-voltage ACHMI.

show abstract

“…These features can increase the efficiency, reliability, and switching frequency, and reduce the complexity, size, and weight of medium-and high-voltage power conversion systems [18], [22]. Applications for 10 kV SiC devices include electric ships [23], traction [10], [24], data center distribution, direct renewables integration to a medium-voltage (13.8 kV) grid [17], fast charging stations [25], HVDC [26], flexible ac transmission systems (FACTS) [27], [28], and transformer-less intelligent power substations [17], [22], [29], [30], [31].…”

Section: Introductionmentioning

confidence: 99%

Design and Experimental Validation of a Wire-Bond-Less 10-kV SiC MOSFET Power Module

DiMarino

Mouawad

Johnson

et al. 2020

IEEE J. Emerg. Sel. Topics Power Electron.

View full text Add to dashboard Cite

Wide-bandgap power devices with voltage ratings exceeding 10 kV have the potential to revolutionize medium-and high-voltage systems due to their high-speed switching and lower on-state losses. However, present power module packages are limiting the performance of these unique switches. The objective of this work is to push the boundaries of high-density, high-speed, 10 kV power module packaging. The proposed package addresses the well-known electromagnetic and thermal challenges, as well as the more recent and prominent electrostatic and electromagnetic interference issues associated with high-speed, 10 kV devices. The module achieves low and balanced parasitic inductances, resulting in a record switching speed of 250 V/ns with negligible ringing and voltage overshoot. An integrated screen reduces the commonmode current that is generated by these fast voltage transients by ten times. This screen connection simultaneously increases the partial discharge inception voltage by more than 50 %. A compact, medium-voltage termination and system interface design is also proposed in this work. With the integrated jet-impingement cooler, the power module prototype achieves a power density of 4 W/mm 3 . This paper presents the design, prototyping, and testing of this optimized package for 10 kV SiC MOSFETs.

show abstract

A Transformerless 6.6-kV STATCOM Based on a Hybrid Cascade Multilevel Converter Using SiC Devices

Cited by 40 publications

References 28 publications

Hierarchical Power Allocation Control for Star-Connected Hybrid Energy Storage System Using Cascaded Multilevel Converters

Hierarchical Power Allocation Control for Star-Connected Hybrid Energy Storage System Using Cascaded Multilevel Converters

Floquet-Theory-Based Small-Signal Stability Analysis of Single-Phase Asymmetric Multilevel Inverters With SRF Voltage Control

Design and Experimental Validation of a Wire-Bond-Less 10-kV SiC MOSFET Power Module

Contact Info

Product

Resources

About