Air traffic controlflow prediction is one of the key issues in aviation transportation management, crucial for optimizing resource allocation, enhancing control efficiency, and ensuring flight operation safety. This ...
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An optimal control strategy for a hybrid power flowcontroller based on PST and VSC is proposed in this paper. Firstly, a power regulation model of the hybrid power flowcontroller considering the impedance variation ...
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An optimal control strategy for a hybrid power flowcontroller based on PST and VSC is proposed in this paper. Firstly, a power regulation model of the hybrid power flowcontroller considering the impedance variation with taps is established. Based on this, the power flow transfer factor between different lines is calculated for abnormal operation scenarios such as power grid maintenance and faults, and a power control strategy considering line thermal stability limit constraints is proposed. Then, combined with the regulation characteristics of the phase shifting transformer (PST) and voltage source converter (VSC), a coordinated control strategy for PST and VSC within the controller is proposed, which minimizes the number of mechanical tap adjustments for the PST and improves the service life of the equipment while meeting the demand for power flow regulation at different time periods. Finally, taking a regional power grid in Hebei Province as an example, the effectiveness of the proposed control strategy is verified.
The temperature control of spacecraft system level thermal vacuum testing used to be manually adjusted to the state of external heat flow and the working state of the single machine, so that the temperature of the spa...
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ISBN:
(纸本)9798350366105;9798350366099
The temperature control of spacecraft system level thermal vacuum testing used to be manually adjusted to the state of external heat flow and the working state of the single machine, so that the temperature of the spacecraft's single machine pulling deviation met the test requirements. In response to the time-consuming and labor-intensive situation of manually adjusting the temperature of multiple areas inside the spacecraft during thermal testing, this article identifies the controlled object based on the analysis of experimental data, and uses system simulation methods to explore the feasibility of closed-loop automatic control. The simulation results show that the PID plus nonlinear limiting controller has applicable robustness for temperature control inside the spacecraft thermal test chamber.
Transmission sections are critical components of regional interconnected power grids, and the reasonable distribution of power flow on these sections is significant for the stable and secure operation of the system. T...
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ISBN:
(纸本)9798350375145;9798350375138
Transmission sections are critical components of regional interconnected power grids, and the reasonable distribution of power flow on these sections is significant for the stable and secure operation of the system. The Thyristor controlled Phase Shifting Transformer (TCPST), as a novel Flexible AC Transmission System (FACTS) device, can effectively improve power flow distribution on transmission sections. This paper focuses on the application of TCPST in optimizing power flow on transmission sections, selecting the load balancing degree and section losses as the control objectives for TCPST. A control strategy for optimizing power flow on transmission sections using TCPST is proposed and its effectiveness is verified through simulations on the PSCAD/EMTDC platform. The simulation results demonstrate that the proposed control strategy provides reasonable control objectives for TCPST applications in transmission sections, thereby improving power flow distribution and enhancing the reliability and safety of section operation.
The Density-Based Traffic Signal control System (DB-TSCS) is an innovative approach to manage traffic flow at intersections. Incorporating advanced sensor technologies and intelligent algorithms, the system adjusts th...
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Ensuring the robust performance of avionics systems demands meticulous attention to worst-case execution time (WCET) analysis. This is especially important in multicore environments where execution time can vary widel...
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The flexible DC interconnection system, which cascades and unitedly controls several converter stations, can effectively improve the new energy consumption and significantly increase the power quality, thus has been w...
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The flexible DC interconnection system, which cascades and unitedly controls several converter stations, can effectively improve the new energy consumption and significantly increase the power quality, thus has been widely used in the power grid. This interconnection system generally uses master-slave control strategy, where chooses one station as the master station to ensure the direct-side voltage's stability and maintain the input and output power balance. However, in some emergency cases, the input or output power can increase to a huge value that even exceeds the capacity of the master station, which not only threatens the safety of the master station but also leads to power imbalance and abnormal fluctuation of the direct-side voltage. Therefore, to avoid the capacity exceedance of the master station, a multi-architecture power distribution strategy is proposed in this study, which sufficiently considers the capacity limitation in the system architecture and innovatively prioritizes the capacity factor in the control strategy of the master station. Furthermore, the proposed strategy also fully considers cases where the system contains different types of slave stations, such as the station with redundant power and the station that can support bidirectional power flow. The strategy then optimizes the power distribution and adjusts the power flow based on the system's different architectures. The reliability and effectiveness of the proposed strategy are finally verified by simulation.(c) 2022 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://***/licenses/by-nc-nd/4.0/). Peer-review under responsibility of the scientific committee of the 3rd International conference on Power, Energy and Electrical Engineering, PEEE, 2022.
A design proposal was put forward to enhance the precision of air flowcontrol in the chemical laboratory, national biosynthesis laboratory, clean room, and other areas. This proposal involves the implementation of a ...
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Dual active bridge converter is widely used in electric vehicle charging infrastructure, Data centers etc. due to the added advantages of inherent soft-switching, galvanic isolation and bidirectional power flow capabi...
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This work presents a numerical study on the passive control of a fluid flow coupled with convective heat transfer by using the lattice Boltzmann method. The study focuses on simulating the fluid flow and temperature d...
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