Research on Short Circuit Operation Control Strategy of a Superconducting Magnet Power Supply for CRAFT

2021 ◽  
Vol 40 (2) ◽  
Author(s):  
Ronglin Huang ◽  
Yinfeng Zhu ◽  
Peng Fu ◽  
Liansheng Huang ◽  
Zhongma Wang ◽  
...  
Keyword(s):  
Control Strategy ◽  
Power Supply ◽  
Short Circuit ◽  
Superconducting Magnet ◽  
Operation Control

scholarly journals Hierarchical and Droop Method for DC Micro-grid Bus Voltage under Isolated operation

2020 ◽  
Vol 185 ◽  
pp. 01062
Author(s):  
Xiangyang Yan ◽  
Ningkang Zheng ◽  
Yilong Kang ◽  
Huanruo Qi ◽  
Kai Li ◽  
...  
Keyword(s):  
Control Strategy ◽  
Power Supply ◽  
System Level ◽  
Level Control ◽  
New Energy ◽  
Operation Control ◽  
Micro Grid ◽  
Dc Bus ◽  
Bus Voltage ◽  
The Stability

Nowadays, distributed generation technology is of great help to the efficient utilization of new energy. If the distributed power supply is connected to the DC micro-grid, it will be more secure and reliable. Therefore, it is necessary to control the voltage stability of the DC bus and ensure the balance of the source charge power of system to ensure the power supply quality and safety of the DC micro-grid. There are two operation modes of DC micro-grid: connected operation and isolated operation, and isolated operation control is the foundation and key of system-level control of DC micro-grid. To solve the problem of bus voltage fluctuation in isolated dc micro-grid, this study proposes a voltage hierarchical-droop control strategy for DC micro-grid, which can effectively improve the stability of the DC bus voltage. Last, this study builds the simulation model of DC micro-grid in the MATLAB/Simulink platform to verify the validity and feasibility of the proposed control strategy.

Calculation of Short-Circuit Fault Currents in an Electric Traction Network with Double Ended Power Supply

2019 ◽  
Vol 5 (5) ◽  
pp. 19-23
Author(s):  
Leonid A. GERMAN ◽  
◽  
Alexandr S. SEREBRYAKOV ◽  
Aleksey B. LOSKUTOV ◽  
Vladimir L. OSOKIN ◽  
...  
Keyword(s):  
Power Supply ◽  
Short Circuit ◽  
Fault Currents ◽  
Traction Network ◽  
Electric Traction ◽  
Short Circuit Fault

Influence of distributed power supply in distributed power distribution network

2021 ◽  
pp. 1-8
Author(s):  
Xin Shen ◽  
Hongchun Shu ◽  
Min Cao ◽  
Nan Pan ◽  
Junbin Qian
Keyword(s):  
Power Supply ◽  
Power Distribution ◽  
Short Circuit ◽  
Power Grid ◽  
Distribution Network ◽  
Distribution Networks ◽  
Power Supplies ◽  
Power Distribution Network ◽  
Power Sources ◽  
Distributed Power

In distribution networks with distributed power supplies, distributed power supplies can also be used as backup power sources to support the grid. If a distribution network contains multiple distributed power sources, the distribution network becomes a complex power grid with multiple power supplies. When a short-circuit fault occurs at a certain point on the power distribution network, the size, direction and duration of the short-circuit current are no longer single due to the existence of distributed power, and will vary with the location and capacity of the distributed power supply system. The change, in turn, affects the current in the grid, resulting in the generation and propagation of additional current. This power grid of power electronics will cause problems such as excessive standard mis-operation, abnormal heating of the converter and component burnout, and communication system failure. It is of great and practical significance to study the influence of distributed power in distributed power distribution networks.

Optimized Non-Dead-Time Control of Inverter with Two-Phase Modulated SVPWM

2012 ◽  
Vol 562-564 ◽  
pp. 1531-1536
Author(s):  
Ming Xing Zhu ◽  
Jing Bo Shi
Keyword(s):  
Control Strategy ◽  
Pulse Width Modulation ◽  
Dead Time ◽  
Control Method ◽  
Short Circuit ◽  
Two Phase ◽  
Zero Crossing ◽  
Time Control ◽  
Bus Voltage ◽  
Current Zero

In the inverter control system, two-phase modulated space vector pulse width modulation (SVPWM) algorithm has the advantages of minimum switch loss and higher utilization of direct current (DC) bus voltage. Non-dead-time control strategy can eliminate the problems of the dead time effects. But the traditional non-dead-time control strategy heavily depends on the current zero-crossing detection, which may cause the output voltage distortion or even a short circuit. Based on the analysis of the reason for the distortion, a new optimized non-dead-time control method is proposed. Two methods for the detection of the overlapping area are enumerated. The conclusions are confirmed by the simulation results with MATLAB/ SIMULINK.

Operation Control Strategy of DC Microgrid Based on E-router

2021 ◽  
Author(s):  
Xiaoying Yu ◽  
Tong Zhou ◽  
Shubo Hu ◽  
Hui Sun ◽  
Fuhong Zhang ◽  
...  
Keyword(s):  
Control Strategy ◽  
Dc Microgrid ◽  
Operation Control
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