Novel heat pipe current-carrying tube of RIP valve-side bushing in converter transformer

Chen, Ming; Liu, Xuandong; Wu, Zhicheng; Zhao, Yi; Zhang, Qiaogen; Tang, Hao

doi:10.1016/j.epsr.2020.106344

Cited by 15 publications

(10 citation statements)

References 24 publications

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“…Chen et al. [21] transformed the current‐carrying conductor into a heat pipe and relied on phase transition of working fluid to improve its heat transfer efficiency. This design has incredible heat dissipation efficiency but needs more research support about its safety before engineering application.…”

Section: Introductionmentioning

confidence: 99%

“…In the aspect of improving the thermal design of RIP bushing, Wang et al [18] proposed the double-layer conductor structure that contains a currentcarrying conductor and an outer winding tube, to decrease the hot-spot temperature of bushing. Chen et al [21] transformed the current-carrying conductor into a heat pipe and relied on phase transition of working fluid to improve its heat transfer efficiency. This design has incredible heat dissipation efficiency but needs more research support about its safety before engineering application.…”

Section: Introductionmentioning

confidence: 99%

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Simulation and experimental analysis of three‐dimensional temperature distribution of ±400‐kV converter transformer valve‐side resin impregnated paper bushing under high current

Xie

Shi

Wang

et al. 2022

IET Generation Trans & Dist

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In order to cope with the current engineering demand for increasing the current-carrying capacity of resin impregnated paper (RIP) bushing, an optimization scheme of RIP bushing was proposed in this paper. Simulation and experimental studies were carried out to verify the rationality of the scheme. An improved simulation method was proposed. To ensure as much accuracy as possible, the physical model of simulation considers the influence of heat conduction, thermal convection and thermal radiation process according to the actual operation environment. To boost the computational efficiency, the improved method simplified the relationship between temperature and heating power of the current-carrying conductor as a fitting formula to avoid the iterative calculation between electromagnetic field simulation and temperature field simulation. The temperature rise test was carried out according to the engineering requirement and the standard international electro technical commission (IEC) 60137:2008. The simulation and experimental results show that the RIP bushing can carry a current with the heating power of its conductor equivalent to that generated by a 50-Hz current of 6736 A while running in a converter station. It is a breakthrough of the current-carrying capacity of high voltage bushing. Meanwhile, the regularity of temperature distribution of the RIP bushing was discussed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Simulation and experimental analysis of three‐dimensional temperature distribution of ±400‐kV converter transformer valve‐side resin impregnated paper bushing under high current

Xie

Shi

Wang

et al. 2022

IET Generation Trans & Dist

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show abstract

“…Extrapolated according to the economic transmission distance, the voltage level of DC transmission should be between 1,500 and 1700 kV for such a long transmission distance ( Liu, 2020 ). In order to prevent the threat of pollution and fire to the DC valve hall and meet the requirements of an oil-free valve hall, the valve side bushing of the UHV converter transformer in China adopts bushing with an epoxy resin impregnated paper (EIP) capacitor core ( Chen et al, 2020 ). As the representative of the state-of-the-art technology, the EIP bushing poses many advantages such as high electrical strength, good heat resistance, strong partial discharge resistance, and good mechanical properties, which make it increasingly widely used in power systems.…”

Section: Introductionmentioning

confidence: 99%

Space Charge Dynamics in Epoxy Resins Under the Influence of a Long-Term High Electric Field at Various Temperatures

Zhang

Jin

et al. 2022

Front. Chem.

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As the main insulating material of an ultra-high voltage (UHV) resin impregnated paper (RIP) bushing, epoxy resin accumulates space charge under the DC voltage, which would affect the insulation properties of the bushing. In this article, the evolution of space charge accumulation and dissipation within the epoxy resin samples was measured under the influence of a long-term (24 h) electric field of 60 kV/mm at 40°, 60°, 80°, and 100°C. The experimental results show that the space charge transport in the epoxy sample was a long-time dynamic process. When the temperature was not greater than 60°C, only homocharge accumulation was observed within the samples, and the space charge distribution did not reach a stable state even after 24 h of voltage application. When the temperature was not lower than 80°C, the positive heterocharge accumulation was observed at the interface between cathode and epoxy. Through analysis by fitting and numerical simulation, it was verified that the positive heterocharge accumulation was caused by the limitation of the hole extraction, and the transport of holes within the samples obeyed the jump conductance model.

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“…In order to meet this demand, long-distance largecapacity transmission technology is particularly important [1][2][3][4]. e stability and reliability of converter transformer is the key to the smooth progress of high voltage transmission, and the failure of UHV converter transformer valve-side bushing is one of the main reasons affecting the stability and reliability of converter transformer [5][6][7]. erefore, when the bushing fails, it should be replaced in time.…”

Section: Introductionmentioning

confidence: 99%

Parameter Calibration on Replacement Manipulator for UHV Valve-Side Bushing Based on Spinor Theory

Zhang

Ai-ping

et al. 2021

Mathematical Problems in Engineering

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In this paper, a structure design scheme of intelligent replacement device for the ultrahigh voltage (UHV) converter transformer valve-side bushing is put forward, and its size is determined according to the actual size of domestic converter station valve hall and UHV converter transformer valve-side bushing. Moreover, the weak links in its working state are analyzed by finite element method to ensure the safety and reliability of the structure. Based on the spinor theory, the forward kinematics and Jacobian matrix model of the manipulator are established, and the analytical solution of inverse kinematics is derived. In order to analyze the accuracy of the intelligent replacement manipulator for the UHV converter transformer valve-side bushing, considering that the end actuator of the robot arm is under heavy load, the absolute positioning accuracy and repeated positioning accuracy are analyzed. In addition, the corresponding error model is established, the least square method is proposed to identify the error model, and the influence of the error caused by the load on the repetition accuracy is analyzed. Finally, the whole process simulation in ROS provides data support for the calculation of repetitive precision and verifies the feasibility of the intelligent replacement device for the UHV converter valve-side bushing.

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Novel heat pipe current-carrying tube of RIP valve-side bushing in converter transformer

Cited by 15 publications

References 24 publications

Simulation and experimental analysis of three‐dimensional temperature distribution of ±400‐kV converter transformer valve‐side resin impregnated paper bushing under high current

Simulation and experimental analysis of three‐dimensional temperature distribution of ±400‐kV converter transformer valve‐side resin impregnated paper bushing under high current

Space Charge Dynamics in Epoxy Resins Under the Influence of a Long-Term High Electric Field at Various Temperatures

Parameter Calibration on Replacement Manipulator for UHV Valve-Side Bushing Based on Spinor Theory

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