Reliability evaluation method for AC/DC hybrid distribution power network considering cascaded multiport power electronic transformer

Liu, Yi; Li, Haibo; Yu, Zhan-qing; Zeng, Rong

doi:10.1049/iet-gtd.2018.7035

Cited by 8 publications

(4 citation statements)

References 23 publications

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“…The mathematical model of the DC microgrid threephase AC-DC converter in the two-dimensional rotating coordinate system is equation (6).…”

Section: B Design Of Current Inner Loop Based On Traditional Pi Contmentioning

confidence: 99%

“…In the equation: dc U is the DC microgrid bus voltage. Equation (36) can be obtained by combining equations (6) and (35).…”

Section: B Design Of Current Inner Loop Based On Traditional Pi Contmentioning

confidence: 99%

“…How to suppress the fluctuation of the bus voltage of the DC microgrid to ensure the stable operation of the system is one of the hot issues in the field of DC microgrid research. When the DC microgrid is connected to the AC power grid, the control of the bus voltage is often achieved by optimizing the control system of the DC microgrid threephase AC-DC bidirectional converter [6][7][8].However, the loads carried by the three-phase AC-DC bidirectional converter of the DC microgrid are usually complicated and changeable, that is, the external interferences are timevarying. Some parameters on the AC side of the converter, such as the equivalent resistance and inductance of the line, cannot be accurately measured.…”

Section: Introductionmentioning

confidence: 99%

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Research and Simulation of DC Microgrid Three-Phase AC-DC Converter Control Strategy Based on Double Loop

Gao

Zhou

et al. 2020

IEEE Access

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The new voltage and current double loop control strategy is proposed to solve the DC microgrid bus voltage fluctuation caused by loads fluctuation, parameters perturbation and unbalanced three-phase power supply. Firstly, the dq axis mathematical model of three-phase AC-DC bidirectional converter in DC microgrid is analyzed and established, and then the controllers are designed according to the dq axis mathematical model. The outer loop is a voltage loop based on variable gain linear extended state observer (VGLESO) and sliding mode theory. VGLESO can not only effectively overcome the problem of peak output of traditional high-gain LESO in the initial stage of operation, and ensure that the system has good startup characteristics, but also quickly track and compensate the total disturbance of the system without additional current sensors. The inner loop is a current loop based on adaptive PI, which can eliminate the influence of system parameters perturbation on bus voltage and improve the system's adaptability. Under the action of the inner and outer loops, the system has good dynamic and static characteristics. Finally, the feasibility and correctness of the control strategy are verified by Matlab/Simulink.

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“…The mathematical model of the DC microgrid threephase AC-DC converter in the two-dimensional rotating coordinate system is equation (6).…”

Section: B Design Of Current Inner Loop Based On Traditional Pi Contmentioning

confidence: 99%

“…In the equation: dc U is the DC microgrid bus voltage. Equation (36) can be obtained by combining equations (6) and (35).…”

Section: B Design Of Current Inner Loop Based On Traditional Pi Contmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Research and Simulation of DC Microgrid Three-Phase AC-DC Converter Control Strategy Based on Double Loop

Gao

Zhou

et al. 2020

IEEE Access

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“…In a high-voltage power system, power transformers mainly work for electricity generation and transmission with high expense [ 1 ]. It is critical to ensure the safety and reliability of power transformers during the operation for industrial production [ 2 , 3 ]. At present, oil-immersed power transformers are mainly popular in China [ 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

Low Working Temperature of ZnO-MoS2 Nanocomposites for Delaying Aging with Good Acetylene Gas-Sensing Properties

Wang

Chen

et al. 2020

Nanomaterials

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The long-term stability and the extension of the use time of gas sensors are one of the current concerns. Lowering the working temperature is one of the most effective methods to delay aging. In this paper, pure MoS2 and ZnO-MoS2 nanocomposites were successfully prepared by the hydrothermal method, and the morphological characteristics were featured by scanning electron microscopy (SEM), X-ray diffraction (XRD), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). Pure MoS2 and ZnO-MoS2 nanocomposites, as a comparison, were used to study the aging characteristic. The sensing properties of the fabricated gas sensors with an optimal molar ratio ZnO-MoS2 (Zn:Mo = 1:2) were recorded, and the results exhibit a high gas-sensing response and good repeatability to the acetylene detection. The working temperature was significantly lower than for pure MoS2. After aging for 40 days, all the gas-sensing response was relatively attenuated, and pure MoS2 exhibits a faster decay rate and lower gas-sensing response than nanocomposites. The better gas-sensing characteristic of nanocomposites after aging was possibly attributed to the active interaction between ZnO and MoS2.

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Optimal double Q AC-DC hybrid distribution system planning with explicit topology-variable-based reliability assessment

et al. 2022

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Reliability evaluation method for AC/DC hybrid distribution power network considering cascaded multiport power electronic transformer

Cited by 8 publications

References 23 publications

Research and Simulation of DC Microgrid Three-Phase AC-DC Converter Control Strategy Based on Double Loop

Research and Simulation of DC Microgrid Three-Phase AC-DC Converter Control Strategy Based on Double Loop

Low Working Temperature of ZnO-MoS2 Nanocomposites for Delaying Aging with Good Acetylene Gas-Sensing Properties

Optimal double Q AC-DC hybrid distribution system planning with explicit topology-variable-based reliability assessment

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