A real-time aging monitoring method of parallel-connected IGBT modules

Yuan, Wu; He, Yigang; Li, Zhigang; Ruan, Yi; Lu, Li; Li, Bing

doi:10.1016/j.mssp.2020.105555

Cited by 5 publications

(3 citation statements)

References 21 publications

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“…Because DGs have larger time constants than ESSs [6], which are based on highperformance modulation controllers (MC) and power semiconductors [7,8], the use of traditional DGs and ESSs in shipboard electrical power systems leads to the need for a control system capable of achieving the reliable operation of SHEPS power sources in both normal and emergency modes.…”

Section: Introductionmentioning

confidence: 99%

Emergency Prevention Control as a Means of Power Quality Improvement in a Shipboard Hybrid Electric Power System

Tierielnyk,

Lukovtsev

2024

Energies

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The problems associated with the greenhouse effect have increased the desire to limit carbon dioxide (CO2) emissions into the atmosphere, including emissions produced by shipboard electrical power systems. This has led to a further search for solutions in this area, such as shipboard hybrid electric power systems (SHEPSs). These systems do not yet have a wide application compared with traditional shipboard electrical power systems for several reasons, including the lack of studies establishing the fault tolerance of such systems. Therefore, in this work, problems related to generated power quality deterioration under large disturbances are studied. To achieve the fault-free operation of SHEPS, an emergency prevention control (EPC) system based on controlled parameter forecasting, along with a system structure and operation algorithm, is developed. The goals of improving electrical power quality are achieved by increasing the control efficiency of the power system’s generating sources. To validate the feasibility of the proposed control system, a computer simulation was carried out after developing a mathematical model of the SHEPS under study. The results of the study show that the use of the proposed EPC system will improve power quality when the controlled parameters are within acceptable limits. At the same time, further research is needed, as the problem of false control action as a consequence of EPC system hardware or software faults remains unstudied.

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Section: Introductionmentioning

confidence: 99%

Emergency Prevention Control as a Means of Power Quality Improvement in a Shipboard Hybrid Electric Power System

Tierielnyk,

Lukovtsev

2024

Energies

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“…The turn-off process is the capacitor discharge process, which is the opposite of the turn-on process. Before the shutdown signal arrives, the IGBT is in the on-state [22][23][24]. And the gate voltage is V GEx = V Gx,on .…”

Section: Turn-off Delaymentioning

confidence: 99%

“…For the external resistance R G,ext , a high-precision LCR bridge is used to measure the resistance to obtain the external turn-on gate resistance R Gon,ext and the external turn-off gate resistance R Goff,ext . For the internal R G,int , the resistance is obtained by measuring the platform voltages V G2(pl)on and V G2(pl)off and the gate currents I G,on and I G,off of the voltages between G2 and AE during the turn-on and turn-off process.By substituting them into Formulas (23) and (24), the gate turn-on resistance R G,on and the gate turn-off resistance R G,off can be obtained by combining the measured external resistance.…”

Section: Characteristic Parameter Identificationmentioning

confidence: 99%

Variable Amplitude Gate Voltage Synchronous Drive Technique for Improving Dynamic Current Balancing in Paralleled IGBTs

Zhang

Lei

et al. 2023

Energies

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The problem of current sharing imbalance in the parallel connection of IGBT multi-modules affects the wide-scale application of parallel IGBT. The current imbalance problem in the dynamic process is mainly caused by the difference in control loop parameters. In parallel IGBT applications, current sharing is a critical concern. Objective differences in IGBT module and driver circuit parameters, as well as incomplete symmetry in the power circuit, lead to inconsistent parasitic parameters, resulting in both static and dynamic current-sharing issues. Static current sharing refers to the uneven distribution of load current under static operating conditions, while dynamic current sharing refers to the imbalance in current distribution among parallel IGBT modules during turn-on and turn-off processes. This is mainly influenced by the synchronization of turn-on and turn-off timings and the consistency of collector current change rates during these processes. The difference in characteristic parameters of IGBT modules is an important factor leading to the difference in control loop parameters, which has a profound impact on the dynamic current-sharing characteristics of IGBT parallel applications. In the case where the device parameters cannot be changed, some drive compensation controls can compensate for the influence of device differences on dynamic current sharing. Accurate identification of the characteristic parameters of the IGBT module is the key to this method. This paper mainly studies a synchronous variable-amplitude drive scheme and studies the influence of parameters such as synthetic gate resistance, gate-emitter capacitance, and on-off gate threshold voltage on the dynamic current-sharing characteristics. The correlation characteristics of the characteristic parameters of the IGBT device body are studied, and the characteristic model of each parameter and the influencing variable is constructed. The parallel working model of PSpice devices is established, and the influence of different characteristic parameters on the current-sharing characteristics is evaluated, and its sensitivity is summarized through simulation analysis. Through the 1700 V/300 A IGBT parallel switch characteristic experiment, the current sharing effectiveness of the synchronous variable amplitude driving method is verified. Finally, the effects of different gate control voltages and different action times on the dynamic current-sharing characteristics are summarized.

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