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检索条件"机构=Key Lab. of Power System Operation and Control"

共 116 条记录，以下是1-10 订阅

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High power Density Buck Boost DC/DC Converter Using SIC MOSFET 1

High Power Density Buck Boost DC/DC Converter Using SIC MOSF...

引用

2024 1st International Conference on Smart Grids and power systems, ICSGPS 2024

作者： Rana, Zuraiz Meng, Runquan Ali, Kashif Haseeb, Rashid Shanxi Key Lab of Power System Operation and Control Taiyuan University of Technology Shanxi China

High power density is an advance in power electronics. Third generation wide-bandgap semiconductor devices (WBG SICs) offer significantly improved performance compared to standard silicon devices. SIC MOSFET is commonly used in power electronic equipment such as converters due to its low resistance, excellent thermal stability, and rapid switching speed. Increasing the switching frequency effectively reduces the circuit size. This article uses SIC MOSFET and STM32 single-chip MCU to design a high power density and higher frequency buck boost converter and establish a simulation model in LTspice. The driving circuit designed for SIC MOSFET is intended to maximize the converter's reliability. Synchronous rectification applies to enhance the converter efficiency. Compared to other types of converters, the size of the converter is reduced, achieving the goals of lightweight and high power density of DC/DC converters. © 2024 Published under licence by IOP Publishing Ltd.

关键词： Silicon carbide

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Optimization of CRM Totem Pole PFC Based on Inductor Current Zero-Crossing Prediction Strategy 7

Optimization of CRM Totem Pole PFC Based on Inductor Current...

引用

7th International Conference on power and Energy Applications, ICPEA 2024

作者： Liu, Xin Ren, Chunguang Taiyuan University of Technology Shanxi Key Lab of Power System Operation and Control Taiyuan China

ISBN: (纸本)9798350356113

The totem-pole bridgeless PFC circuit based on GaN devices is currently a research hotspot. To achieve full-range ZVS (Zero Voltage Switching), it is necessary to select a reasonable ZCD (Zero Current Detection) sampling scheme and dead time for the inductor current in CRM (Critical Conduction Mode). Addressing the issues of large computational burden and poor reliability in current inductor current zero-crossing prediction strategies, this paper proposes optimizing the turn-off time of the freewheeling diode and the adaptive dead time to improve the reliability of inductor current zero-crossing prediction and the realization of full-range ZVS. Finally, leveraging the powerful computational capability of a high-performance DSP, the proposed method was validated through reasonable software design and the establishment of an experimental platform. © 2024 IEEE.

关键词： Gallium nitride

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Regional optimal scheduling of distribution network based on soft open point 10

Regional optimal scheduling of distribution network based on...

引用

10th IEEE International power Electronics and Motion control Conference, IPEMC 2024 ECCE Asia

作者： Zhang, Jiamei Sun, Kai Tsinghua University State Key Lab of Power System Operation and Control Beijing100084 China

ISBN: (纸本)9798350351330

The proliferation of distributed photovoltaics and electric vehicles in distribution network (DN) has led to differentiation of the same region, which may result in voltage exceeding the limits and unbalanced branch flow. At the same time, soft open point (SOP) is replacing traditional interconnect switches with greater flexibility and controllab.lity. This paper proposes a SOP based regional balanced optimization scheduling method for distribution networks. In the optimal model, the distribution network division method is proposed based on the sensitivity analysis and system general controllab.e capability index. An optimization model is constructed to minimize the operation costs within the region while the voltage is within the safe range based on the active and reactive power control of SOPs. The nonlinear factors are converted into linearized based on piecewise linearization and second-order cone optimization methods. The superiority of the proposed method is proved through comparative case analysis. © 2024 IEEE.

关键词： Electric power distribution

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Coordinated control Strategy of Secondary Ripple in DC Microgrid Based on Impedance Model 5th

Coordinated Control Strategy of Secondary Ripple in DC Micro...

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5th International Conference on Energy Storage and Intelligent Vehicles, ICEIV 2022

作者： Li, Xuejin Ren, Chunguang Pang, Fangyuan Deng, Haonan Wang, Yifan Qin, Yue Shanxi Key Lab of Power System Operation and Control Taiyuan University of Technology Taiyuan China

ISBN: (纸本)9789819910267

When DC microgrid is connected to a single-phase AC load, it will cause the DC bus to generate double-frequency voltage pulsation, which seriously affects the normal operation of important units. To solve the above problems, from the perspective of impedance modeling, this paper proposes a secondary ripple coordinated control strategy of DC microgrid based on impedance model. Firstly, the origin of the secondary ripple voltage of the DC microgrid is firstly analyzed, and the input and output impedance models of each unit of the DC microgrid are established. On this basis, the paper introduces band-pass and band stop filters to reshape the output impedance of each key converter at 100 Hz, so as to realize the effective suppression of secondary ripple current by energy storage converter. In order to further reduce the influence of secondary ripple power on each unit connected to the DC bus and ensure the voltage quality of DC bus. The active capacitor converter is introduced to actively control the secondary ripple power by adjusting the virtual capacitance of the active capacitor, so as to suppress the secondary ripple voltage of the DC bus. Finally, the effectiveness of the control strategy proposed in this paper is verified by simulation. © 2023, Beijing Paike Culture Commu. Co., Ltd.

关键词： power quality

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Study of improved active-clamped phase shift full bridge converter 3

Study of improved active-clamped phase shift full bridge con...

引用

3rd International Conference on Electrical Engineering and control Science, IC2ECS 2023

作者： He, Xin Meng, Runquan Li, Ruishu Taiyuan University of Technology Shanxi Key Lab of Power System Operation and Control Taiyuan China

ISBN: (纸本)9798350382426

Aiming at the drawbacks of the conventional phase-shifted full-bridge topology in terms of high voltage stress in the synchronous rectifier switches and high switching loss of the primary-side switch under low load conditions, a phase-shifted full-bridge circuit with improved control of an active clamp circuit is proposed. The converter utilizes the resonance of the switch parasitic capacitance with the primary-side resonant inductor to achieve ZVS (Zero- Voltage-Switch) under light load, and effectively improves the efficiency under heavy load by zeroing the primary-side current in the circulating current stage. In this paper, the topology, operating principle and operating characteristics of the proposed scheme are described in detail, and the feasibility of the scheme is verified by simulation in PLECS platform. © 2023 IEEE.

关键词： Active clamp component LC resonance Phase-shifted full bridge Switched capacitor Zero-voltage switching

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State Identification of power system Based on Visual Geometric Group Network 4

State Identification of Power System Based on Visual Geometr...

引用

2022 4th International Conference on New Energy system and Electrical Engineering, NESEE 2022

作者： Yang, Jing Meng, Runquan Shanxi Key Lab of Power System Operation and Control Taiyuan University of Technology Taiyuan030024 China

Accurate and timely identification of power system operation states are requisite for taking control strategies and ensuring power system security. With the high grid penetration of renewable energy generation and wide application of power electronic equipment, power system is becoming more complicated and facing more uncertainties. Traditional model based power system state identification methods are faced with challenges and data driven methods have great prospects. This paper proposes a new data-driven method for identifying power system operating states based on visual geometric group network VGG16 (16-layer Visual Geometry Group (VGG16). Firstly, the Lasso algorithm is used to select the operating state features of the power system to realize the features dimensionality reduction. Then, the weights of the loss functions are adjusted according to the difficulty of model for identifying power system states. Finally, the IEEE39 node system is used as an example, the effectiveness and robustness of the proposed method is verified. © Published under licence by IOP Publishing Ltd.

关键词： Geometry

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Robust optimization scheduling of microgrid considering a tiered carbon trading mechanism and flexible loads 3

Robust optimization scheduling of microgrid considering a ti...

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2024 3rd International Conference on Green Energy and power systems, ICGEPS 2024

作者： Li, Xiaoxu Yang, Qianjie Qin, Wenping Shanxi Key Lab of Power System Operation and Control Taiyuan University of Technology Shanxi Taiyuan030024 China State Grid Yuncheng Power Supply Company Shanxi Yuncheng044000 China

Considering the comprehensive demand response, stepwise carbon trading, and uncertainty of wind power output for cogeneration microgrids, relevant optimization scheduling research will be carried out. The electric heating load is divided into non-dispatchable electric heating load and dispatchable electric heating load. By introducing electric heating demand and tiered carbon trading, the economic and low-carbon operation of microgrids can be achieved. The fluctuation of the output of new energy units is reflected using probability scenario sets in statistics, and a robust optimization model with related distributions is constructed using the C&CG algorithm to calculate and solve the established model. The simulation and comparison of numerical examples show that the microgrid energy management scheme formulated by the model established in this paper has good economic and environmental friendliness, and it also simultaneously validated the superiority of distributed robust optimization methods over traditional optimization methods © Published under licence by IOP Publishing Ltd.

关键词： Numerical methods

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A Hybrid Dynamic Voltage Sharing Scheme for Series-connected SiC MOSFETs with Single Gate Drive 4

A Hybrid Dynamic Voltage Sharing Scheme for Series-connected...

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2022 4th International Conference on Energy, power and Grid, ICEPG 2022

作者： Ren, Yuhan Wang, Jinhao Meng, Runquan Li, Tingting Chen, Juan Zhang, Taotao Shanxi Key Lab of Power System Operation and Control Taiyuan University of Technology Taiyuan China

At present, the voltage level of a commercial SiC MOSFET can hardly meet the requirements of high-voltage field. For the sake of achieving the application of MOSFETs in high-voltage fields, the method of series-connected MOSFETs has become a practical and effective solution. However, multiple series-connected SiC MOSFETs face the problem of voltage unbalance, especially dynamic voltage unbalance. Generally, the problem of dynamic unbalance could be solved using load side voltage sharing schemes or the methods of gate side. This paper uses a hybrid dynamic voltage sharing scheme for the single-driven series-connected SiC MOSFETs. That is to say, based on a sequential lagging single gate drive topology, combining active clamping circuits with RCD snubber circuits are introduced to solve the problem of dynamic voltage unbalancing of the whole module in this paper. Compared to the circuit without any dynamic voltage sharing scheme, the dynamic voltage imbalance degree of the circuit with a hybrid dynamic voltage sharing scheme is decreased to 3.75% during the switching-on and switching-off periods. The equalization effect would be verified through the simulation under clamped inductive load in LTspice. © Published under licence by IOP Publishing Ltd.

关键词： Silicon carbide

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Regional optimal scheduling of distribution network based on soft open point

Regional optimal scheduling of distribution network based on...

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International Conference on power Electronics and Motion control (IPEMC)

作者： Jiamei Zhang Kai Sun State Key Lab of Power System Operation and Control Tsinghua University Beijing

ISBN: (数字)9798350351330

ISBN: (纸本)9798350351347

关键词： Photovoltaic systems Reactive power control Sensitivity analysis Distribution networks Optimal scheduling Electric vehicles power electronics

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Software and hardware design of microcomputer relay protection device based on DSP 2

Software and hardware design of microcomputer relay protecti...

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2023 2nd International Conference on power system and power Engineering, PSPE 2023

作者： Huo, Jingchong Meng, Runquan Li, Shengwen Liu, Qiang Shanxi Key Lab of Power System Operation and Control Taiyuan University of Technology Taiyuan030024 China Electric Power Research Institute State Grid Shanxi Electric Power Company Taiyuan030001 China

The research on fault protection technology of AC power grid in AC/DC hybrid microgrid is very mature, while the research on fault protection technology of DC microgrid is still in the development stage. Therefore, the research and development of necessary power electronics and protection devices have become a research hotspot in recent years. In this paper, a microcomputer protection device based on the TMS320F28335 chip is developed. Considering the anti-interference of field use, detailed hardware and software design is carried out. The debugging effect is good, and the low-voltage DC short-circuit fault protection function can be reliably realized. © Published under licence by IOP Publishing Ltd.

关键词： Microcomputers

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