Power Loss Modeling of Individual IGBT and Advanced Voltage Balancing Scheme for MMC in VSC-HVDC System

Son, Gum Tae; Lee, Soo Hyoung; Park, Jung–Wook

doi:10.5370/jeet.2014.9.5.1471

Cited by 8 publications

(3 citation statements)

References 13 publications

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“…Table 2 summarizes the study results in terms of the switching frequency, THD, switching, conduction and total losses for mentioned voltage balancing methods. The estimated switching and conduction losses are calculated as the percentage of transferred active power based on the datasheet of 5SNA1200G330100 insulatedgate bipolar transistors (IGBTs) [26][27][28]. For accurate comparison, we set the same switching frequency to the proposed ad-hoc switching method (Method IV) and the Advanced Full Sorting (Method II).…”

Section: Simulation Resultsmentioning

confidence: 99%

Trade-Off Strategies in Designing Capacitor Voltage Balancing Schemes for Modular Multilevel Converter HVDC

Nam¹,

Kim²,

Kim³

et al. 2016

Journal of Electrical Engineering and Technology

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-This paper focuses on the engineering trade-offs in designing capacitor voltage balancing schemes for modular multilevel converters (MMC) HVDC: regulation performance and switching loss. MMC is driven by the on/off switch operation of numerous submodules and the key design concern is balancing submodule capacitor voltages minimizing switching transition among submodules because it represents the voltage regulation performance and system loss. This paper first introduces the state-ofthe-art MMC-HVDC submodule capacitor voltage balancing methods reported in the literatures and discusses the trade-offs in designing these methods for HVDC application. This paper further proposes a submodule capacitor balancing scheme exploiting a control signal to flexibly interchange between the on-state and the off-state submodules. The proposed scheme enables desired performance-based voltage regulation and avoids unnecessary switching transitions among submodules, consequently reducing the switching loss. The flexibility and controllability particularly fit in high-level MMC HVDC applications where the aforementioned design trade-offs become more crucial. Simulation studies for MMC HVDC are performed to demonstrate the validity and effectiveness of the proposed capacitor voltage balancing algorithm.

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Section: Simulation Resultsmentioning

confidence: 99%

Trade-Off Strategies in Designing Capacitor Voltage Balancing Schemes for Modular Multilevel Converter HVDC

Nam¹,

Kim²,

Kim³

et al. 2016

Journal of Electrical Engineering and Technology

Self Cite

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“…The methods based on device physical mechanisms have been studied as follows: Son et al [18] calculated the power consumption in each switching process with a small amount of calculation by using polynomial curve fitting model. Liu et al [19] established an unsteady millisecond level prediction model and a reduced order thermal model based on the equivalent switching loss set in the database.…”

Section: Literature Reviewmentioning

confidence: 99%

Enhanced marine predators algorithm optimized support vector machine for IGBT switching power loss estimation

Liu,

Li,

Liu

2023

Meas. Sci. Technol.

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As the use of renewable energy generation continues to grow, improving power conversion efficiency has become an urgent task. This study aims to propose a high-precision power module loss estimation method, with a focus on predicting the switching losses of Insulated Gate Bipolar Transistor (IGBT) modules, which is crucial for the reliability assessment of IGBT modules. The main objective of this study is to establish a high-precision predictive model for IGBT module switching losses to enhance the reliability and efficiency of these devices. Firstly, a dynamic characteristic test platform was established to acquire relevant data for in-depth analysis of IGBT behavior. Secondly, given the excellent performance of Support Vector Machine (SVM) in handling both strong and small-sized datasets, SVM was chosen as the foundational model for high-precision switching loss estimation. Subsequently, an Enhanced Marine Predatory Algorithm (EMPA), known for its superior convergence precision and speed, was introduced to optimize the random parameters of SVM. Finally, a method based on the Enhanced Marine Predatory Algorithm Optimized Support Vector Machine (EMPA-SVM) was constructed for predicting IGBT switching power losses. The proposed approach was validated using dynamic characteristic test data. And it indicated that the predictive model achieved the value of R2 exceeding 99.8% for switching losses. Additionally, the MAE and RMSE metrics of EMPA-SVM model outperformed other models. Therefore, the research results unambiguously demonstrate the significant benefits of accurately predicting IGBT switching losses in enhancing device performance.

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“…Hence, we have to restrict the current considering the dc component. The arm current of the MMC is expressed as (6) to (8), and if the circulating current is controlled to zero, the ac-side current can be expressed as (26) and (27).…”

Section: Current Limit Methods Considering Current Capacity Of Switchimentioning

confidence: 99%

Design and Control Method for Sub-module DC Voltage Ripple of HVDC-MMC

Gwon¹,

Park²,

Kang³

et al. 2016

Journal of Electrical Engineering and Technology

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-This paper proposes a design and control method for a high-voltage direction current modular multilevel converter (HVDC-MMC) considering the capacitor voltage ripple of the submodule (SM). The capacitor voltage ripple consists of the line frequency and double-line-frequency components. The double line-frequency component does not fluctuate according to the active power, whereas the line-frequency component is highly influenced by the grid-side voltage and current. If the grid voltage drops, a conventional converter increases the current to maintain the active power. A grid voltage drops, current increment, or both occur with a capacitor voltage ripple higher than the limit value. In order to reliably control an MMC within a limit value, the SM capacitor should be designed on the basis of the capacitor voltage ripple. In this paper, the capacitor voltage ripple according to the grid voltage and current are analyzed, and the proposed control method includes a current limitation method considering the capacitor voltage ripple. The proposed design and control method are verified through simulation using PSCAD/EMTDC.

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Power Loss Modeling of Individual IGBT and Advanced Voltage Balancing Scheme for MMC in VSC-HVDC System

Cited by 8 publications

References 13 publications

Trade-Off Strategies in Designing Capacitor Voltage Balancing Schemes for Modular Multilevel Converter HVDC

Trade-Off Strategies in Designing Capacitor Voltage Balancing Schemes for Modular Multilevel Converter HVDC

Enhanced marine predators algorithm optimized support vector machine for IGBT switching power loss estimation

Design and Control Method for Sub-module DC Voltage Ripple of HVDC-MMC

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