Abstract
Due to imperfect manufacturing technology, design defects and environmental impact, the failure rate of 10 kV switchgear is very high. For this reason, based on taken present situation of traditional switchgear and the current technical requirements for switchgear into account, a new reliable and safe modular high voltage switchgear design method is presented in this paper, which can reduce the failure rate of switchgear and improve the reliability of power supply. The electric field and temperature rise simulation model are established to check the reasonability and validity. By using the finite element software, the simulation results show that the design in this paper has a maximum temperature rise of 55 K for the main cabinet and a maximum temperature rise of 45 K for the deputy cabinet, which is far below the international standard of 70 K. The areas where the partial discharge is likely to occur within the switchgear are places such as the connection between bus-bar and cabinet, bus-bar joint and bus-bar corner. In order to avoid potential dangers, the discharge point must be located in time to prevent insulation fault of electrical equipment of the high voltage switchgear. The simulation results demonstrate that the design method in this paper greatly improve the reliability of switchgear and meets the demands of power system.
Highlights
Switchgear is a kind of reliable, small metal enclosed switch power equipment, which is widely used in China
Due to imperfect manufacturing technology, design defects and environmental impact, the failure rate of 10 kV switchgear is very high. For this reason, based on taken present situation of traditional switchgear and the current technical requirements for switchgear into account, a new reliable and safe modular high voltage switchgear design method is presented in this paper, which can reduce the failure rate of switchgear and improve the reliability of power supply
Apr. 10, 2020 contactors, fuses, bus-bar and the corresponding secondary equipment such as the devices of control, interlocking, protection, monitoring and communication. It is a combined electrical appliance which reduces the space occupied by these power equipment, improve the safety of equipment operation and significantly improve the economic benefits [1] [2]. 10 kV switchgear plays an important role in the power grid, but its failure rate is very high and can reach 42.3%
Summary
Switchgear is a kind of reliable, small metal enclosed switch power equipment, which is widely used in China. It is a combined electrical appliance which reduces the space occupied by these power equipment, improve the safety of equipment operation and significantly improve the economic benefits [1] [2]. To ensure the stable operation of the switchgear, the electric field and temperature field of the new modular switchgear are simulated using finite element method, and the design of the high-voltage switchgear is analyzed to check whether it meets the requirement of the standard
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