scholarly journals Development of 110kV Thyristor Assisted Arc Extinguishing Hybrid OLTC

2021 ◽  
Vol 243 ◽  
pp. 01003
Author(s):  
Fei Shi ◽  
Yu Yin ◽  
Ben-Ping Ding ◽  
Fei Gao ◽  
Peng-Fei Jia ◽  
...  
Keyword(s):  
Structure Design ◽  
Core Structure ◽  
Switching Process ◽  
Mechanical Structure ◽  
Design Scheme ◽  
Factory Test ◽  
Type Test ◽  
Tap Changer ◽  
Load Tap Changer

On the basis of formulating the technical conditions of 110kV thyristor assisted arc extinguishing hybrid on load tap changer, this paper carries out the mechanical structure design, gives the design scheme of switching switch, selection switch and other connecting parts, and introduces in detail the adaptive improvement design of switching core structure and the coordination of switching process and sequence after adding thyristor module, and then completes the mixing The factory test and the type test of 110kV hybrid OLTC have been completed.

scholarly journals The switching principle of thyristor assistant arc extinguishing hybrid on-load tap-changer

2021 ◽  
Vol 336 ◽  
pp. 01016
Author(s):  
Taoyuan Cai ◽  
Xingying Zhao ◽  
Fei Shi ◽  
Benping Ding ◽  
Pengfei Jia ◽  
...  
Keyword(s):  
High Reliability ◽  
Switching Process ◽  
Thyristor Switch ◽  
Tap Changer ◽  
Load Tap Changer ◽  
Mechanical Switch

Thyristor assistant arc extinguishing hybrid on-load tap-changer uses thyristor auxiliary mechanical switch which combines the advantages of mechanical switch and thyristor switch. The hybrid OLTC has high reliability, a relatively small amount of work needs to be maintained. It is a kind of very promising transformer OLTC. This project focus on the application of the hybrid OLTC in 110, 220kV transformer, introduces the auxiliary thyristor arc hybrid on-load tap-changer principle of passive trigger with odd block switch to even block as an example, describes the hybrid on-load tap-changer switching process, and the switching principle of simulation verification, on the basis of summarizing the characteristics of hybrid on-load tap-changer.

scholarly journals Physical Application of Mechanical Parts and Components Simulate in Receivable Auxiliary Multifunction Mechanical Hand and Claw

2021 ◽  
Vol 2083 (2) ◽  
pp. 022074
Author(s):  
Yuzhuo Yang
Keyword(s):  
Stress Analysis ◽  
Structure Design ◽  
Office Work ◽  
Mechanical Parts ◽  
Mechanical Structure ◽  
Overall Design ◽  
Design Scheme ◽  
Mechanical Hand ◽  
Part Structure ◽  
And Control

Abstract Based on the analysis of current office work status and office robots, this paper proposes a design scheme of intelligent mechanical gripper which can transfer data and move objects independently to assist daily office work. It is proposed to design mechanical structure, including mechanism motion design and part structure design, and to use Autodesk Inventor to design and simulate mechanical parts and components. Dimensional and strength checks are carried out on key components, and stress analysis is simulated by using stress analysis module included in Autodesk Inventor. Finally, the mechanical structure design scheme and control system design scheme for the mechanical gripper are proposed. The overall design mainly centers on the functions expected to be completed, and innovates different organizations in combination to achieve the intended objective.

A Solid-State On-Load Tap Changer for the Power Transformers of 10—0.4 kV Distribution Networks

Vestnik MEI ◽  
2020 ◽  
Vol 6 (6) ◽  
pp. 82-90
Author(s):  
Dmitriy I. Panfilov ◽  
◽  
Mikhail G. Astashev ◽  
Aleksandr V. Gorchakov ◽  
◽  
...  
Keyword(s):  
Solid State ◽  
Physical Model ◽  
High Speed ◽  
Power Transformer ◽  
Voltage Control ◽  
Power Transformers ◽  
Control Algorithms ◽  
Load Voltage ◽  
Tap Changer ◽  
Load Tap Changer

The specific features relating to voltage control of power transformers at distribution network transformer substations are considered. An approach to implementing high-speed on-load voltage control of serially produced 10/0.4 kV power transformers by using a solid-state on-load tap changer (SOLTC) is presented. An example of the SOLTC circuit solution on the basis of thyristor switches is given. On-load voltage control algorithms for power transformers equipped with SOLTC that ensure high reliability and high-speed operation are proposed. The SOLTC performance and the operability of the suggested voltage control algorithms were studied by simulation in the Matlab/Simulink environment and by experiments on the SOLTC physical model. The structure and peculiarities of the used simulation Matlab model are described. The SOLTC physical model design and its parameters are presented. The results obtained from the simulating the SOLTC operation on the Matlab model and from the experiments on the SOLTS physical model jointly with a power transformer under different loads and with using different control algorithms are given. An analysis of the experimental study results has shown the soundness of the adopted technical solutions. It has been demonstrated that the use of an SOLTC ensures high-speed voltage control, high efficiency and reliability of its operation, and arcless switching of the power transformer regulating taps without load voltage and current interruption. By using the SOLTC operation algorithms it is possible to perform individual phase voltage regulation in a three-phase 0.4 kV distribution network. The possibility of integrating SOLTC control and diagnostic facilities into the structure of modern digital substations based on the digital interface according to the IEC 61850 standard is noted.

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