Results 51 to 60 of about 17,363 (249)
High Voltage, 2019 High-voltage direct current circuit breakers (HVDC CB) are one of the key technologies of multi-terminal DC systems and DC grids. Different from other equipment that use a large number of power electronic devices, the HVDC CB cannot obtain its power from
Xiangyu Zhang +7 more
doaj +1 more source
High Voltage, EarlyView.ABSTRACT In this paper, a model‐aided state parameter inversion identification method based on the coil current (CC) of electromagnetic trip device (ETD) is proposed to realise the state parameter inversion online and the quantitative description of defects.
Feiyue Yan +3 more
wiley +1 more source
High Voltage, EarlyView.ABSTRACT Surface discharge is a typical fault type in electric power equipment. High temperature in long‐term operation can easily lead to ageing of materials, resulting in changes in surface characteristics and surface discharge faults. In this paper, a method of surface discharge identification of silicon rubber (SiR) based on spectral detection ...
Yanze Han +6 more
wiley +1 more source
Multiterminal High‐Voltage Direct Current Projects: A Comprehensive Assessment and Future Prospects
High Voltage, EarlyView.ABSTRACT Multiterminal high‐voltage direct current (MT‐HVDC) systems are an important part of modern power systems, addressing the need for bulk power delivery and efficient renewable energy integration. This paper provides a comprehensive overview of recent advances in MT‐HVDC technology, including launched projects and ongoing initiatives.
Mohammad Hossein Mousavi +3 more
wiley +1 more source
Applied Sciences, 2023 Mechanical defects and partial discharge (PD) defects can appear in the indoor switchgear of substations or distribution stations, making the switchgear a safety hazard. However, traditional acoustic methods detect and identify these two types of defects
Dongyun Dai +5 more
doaj +1 more source
Nondestructive Measurement of Residual Stress on Epoxy Insulators Using Thermoelastic Method
High Voltage, EarlyView.ABSTRACT Residual stress is inevitable in epoxy insulators, which easily leads to small cracks and even insulation breakdown during the operation of gas‐insulated transmission line (GIL)/gas‐insulated switchgear (GIS). This study proposes a nondestructive method to measure the residual stress on epoxy insulators using thermoelastic effects.
Hucheng Liang, Bei Chu, Boxue Du
wiley +1 more source
Diance yu yibiaoGas-filled switchgear is widely used in high altitude areas of China due to its wide adaptability and high reliability. Due to the reduction of atmospheric pressure in high altitude areas, the air cooling capacity is reduced, so the gas-filled switchgear
WANG Hao +5 more
doaj +1 more source
Research and Application of Temperature Load of Switchgear
Journal of Physics: Conference Series, 2022 Abnormal changes in the temperature and load current of the high-current switchgear will directly affect the reliable operation of the equipment. In order to effectively monitor the temperature of the switchgear and ensure the reasonable arrangement of ...
Ruibo Yang +5 more
semanticscholar +1 more source
High Voltage, EarlyView.ABSTRACT In the Hainan–Guangdong interconnection project, oil leakage in oil‐filled cables required replacing the faulty core with a single core from a three‐core cross‐linked polyethylene (XLPE) cable, leading to mixed operation of XLPE and oil‐filled cables.
Liang Zou +4 more
wiley +1 more source
Temperature Field Simulation and Structure Improvement of 12kV Switchgear
Journal of Physics: Conference Series, 2022 Aiming at the heating problem of 12kV switchgear, the model of its main circuit module was established and simplified. Then, the temperature field and airflow field were simulated by finite element analysis software ANSYS.
Yanjie Zhao, Li’an Chen, Rui Qiao
semanticscholar +1 more source