Analysis for magnetic field disturbance of modular multilevel converter based high voltage direct current (MMC‐HVDC) converter valve

Qi, Lei; Wang, Muxue; Zhang, Xiangyu; Shen, Hong; Wang, Hongyu; Jiao, Chongqing

doi:10.1049/hve2.12227

Cited by 9 publications

(7 citation statements)

References 19 publications

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“…Therefore, when the gate-emitter voltage is in the forward bias, it is evident that the charge variation ΔQ n at that location increases, leading to an overall decrease in the total charge Q F , according to (1). Consequently, according to (2), the device's onstate voltage drop increases.…”

Section: Cell-level Modeling Of Bigt and Characteristicmentioning

confidence: 99%

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Driver optimization of high power converter based on BIGT reverse conduction loss

Qi,

Li,

Zhang

et al. 2024

IET Power Electronics

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Bi‐mode Insulated Gate Transistor (BIGT), owing to its notable attributes in power density and compact dimensions, holds promising applications in the realm of high power converters. However, its characteristic of the voltage drop in diode mode controlled by gate‐emitter voltage poses significant challenges for low‐loss operation. This paper investigates the relationship between BIGT's on‐state voltage drop in diode mode and its gate‐emitter voltage in detail. By combining simulation and experimental analysis, recommended the gate‐emitter voltage values are provided. Furthermore, a novel driver optimization scheme is proposed to automatically lower the gate voltage during reverse conduction, which can effectively reduce the reverse on‐state losses of the BIGT. Experimental validation demonstrates a 10.6% reduction in reverse on‐state voltage drop, showcasing the efficacy of the proposed driver optimization scheme.

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Section: Cell-level Modeling Of Bigt and Characteristicmentioning

confidence: 99%

“…Insulated Gate Bipolar Transistor (IGBT) modules, serving as the core power devices [1][2][3][4], have seen substantial advancements in performance and reliability over the past three decades. However, their current-carrying capacity has approached theoretical boundaries.…”

Section: Introductionmentioning

confidence: 99%

Driver optimization of high power converter based on BIGT reverse conduction loss

Qi,

Li,

Zhang

et al. 2024

IET Power Electronics

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“…     which means factorial. Usually,  the value range is [1,2] , and the efficiency is the best at that time.…”

Section: Levi's Flight Strategy Optimization Sparrow Search Algorithmmentioning

confidence: 99%

“…Therefore, the research on intelligent assistant decision system of flexible DC converter valve provides decision support for managers, is conducive to improving the efficiency of fault handling, and has great significance for promoting the development of domestic flexible DC transmission technology. The Flexible DC Converter Valve [1][2] (FDCCV) is an important component of the HVDC transmission system, and its correct operation is crucial to the stability and reliability of the power grid.…”

Section: Introductionmentioning

confidence: 99%

Operation monitoring and decision-making assistance for flexible DC converter valve based on improved LightGBM

Tian,

Xu,

Liu

et al. 2024

Ninth International Symposium on Sensors, Mechatronics, and Automation System (ISSMAS 2023)

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Aiming at the problem that the fault diagnosis accuracy of flexible DC converter valve is not high, a fault diagnosis method of Flexible DC converter valve of PCA-LSSA-LightGBM is proposed. Using the fault feature library collected by the simulation system, the normalization and standardization processing are carried out first, and then the key fault features are extracted through principal component analysis to reduce the complexity of fault diagnosis. Combined with the operation mode of flexible DC converter valve, a lightweight gradient elevator model is established, and optimizing the parameters of the light gradient boosting machine are found by introducing Singer mapping and the sparrow search algorithm optimized by Levy flight strategy. Experiments show that the comprehensive accuracy rate of PCA-LSSA-LightGBM model diagnosis results is 96.09%, which is higher than that of other fault diagnosis methods, which verifies the correctness and effectiveness of the fault diagnosis of flexible DC converter valve applied in this method.

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“…The power equivalent experiment platform includes the upper and lower arms of a single-phase MMC, and power is transmitted between the arms through outdoor reactors. Each bridge arm has three half-bridge SMs [33]. The experimental platform is equipped with a water-cooling system.…”

Section: The Equivalent Experiments Of Half-bridge Sub-modulementioning

confidence: 99%

A novel integrated monitoring method for MPPF capacitor and IGBT junction temperature of half‐bridge modules

Zhang

et al. 2023

IET Power Electronics

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Capacitance and Insulated gate bipolar transistor (IGBT) junction temperature are two critical healthy parameters for modular multilevel converters (MMC) sub‐modules (SMs) condition monitoring. This paper proposes an integrated monitoring method for capacitance degradation and IGBT junction temperature variation. By measuring multiple characteristics of the same port voltage, the capacitance and the junction temperature can be obtained simultaneously, which greatly simplifies the measurement unit required for condition evaluation and realizes the submodule‐level condition monitoring at a lower cost. The capacitance is characterized by voltage changes during capacitor discharging and the junction temperature is monitored by capacitor voltage overshoot (peak value) during IGBT turn‐off. Theoretical analysis and experimental results verify the effectiveness of the proposed method and articulated the influence of load current, SM capacitor pre‐discharge voltage, and junction temperature. Moreover, an online data‐acquisition circuit for time‐specific capacitor voltage characterization is devised.

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Analysis for magnetic field disturbance of modular multilevel converter based high voltage direct current (MMC‐HVDC) converter valve

Cited by 9 publications

References 19 publications

Driver optimization of high power converter based on BIGT reverse conduction loss

Driver optimization of high power converter based on BIGT reverse conduction loss

Operation monitoring and decision-making assistance for flexible DC converter valve based on improved LightGBM

A novel integrated monitoring method for MPPF capacitor and IGBT junction temperature of half‐bridge modules

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