In recent decades, China's modern economy has continued to develop, and computer technology, information technology and other related industries have also made rapid progress.As commercial, residential and public buildings continue to increase their requirements for intelligent management and energy conservation, power monitoring systems have begun to gradually penetrate into people's daily lives and play an irreplaceable role.The optimization of the economic atmosphere has generally increased people's demands for the reliability, safety, comfort, and efficiency of office and living environments. Intelligent buildings have emerged as the times require, successfully achieving the perfect combination of quality of life and information services, and becoming the construction industry of the 21st century. mainstream.Intelligent buildings are not only the embodiment of the country's comprehensive national strength and technological level, but also reflect the social development's concern for human nature.

With the increasing demand for electricity, power supply reliability requirements of the power system is becoming higher and higher, many power supply systems have two or more power supply lines. Automatic switching device for backup power supply can effectively improve the reliability of power supply, this type of device can automatically and quickly put the backup power supply into operation or switch the user to the backup power supply after the working power supply is disconnected due to a fault. This paper introduces AM5-DB low-voltage automatic switching device for backup power supply, which can provide corresponding protection functions for different power supply modes in Dongting substation project, and can greatly improve the reliability, safety and power supply quality of substation operation, which is conducive to the realization of comprehensive automation of the substation, and the realization of unmanned or fewer people on duty.

The high-voltage switchgear is an important electrical equipment in the substation. It is responsible for the dual functions of closing and disconnecting power lines and protecting the safety of the system. The high-voltage switchgear operates in an environment of high voltage, large current, and strong magnetic field for a long time. Oxidation and contact resistance often cause the contacts to heat up and the temperature is too high. If not discovered and dealt with in time, it may cause serious accidents such as fires, power outages, etc. Therefore, the problem of real-time temperature monitoring in high-voltage switch cabinets has become an urgent problem to be solved in the power system. The article on practical issues proposes a wireless temperature measurement system for high-voltage switch cabinets based on a single-chip microcomputer. The system has the characteristics of simple structure, temperature measurement, and high accuracy.

This article analyzes the connotation and main characteristics of the ubiquitous power Internet of Things, and conducts a comprehensive discussion on the construction goals, basic architecture, key technologies and future development strategies of the ubiquitous power Internet of Things.

As a part of the urban public transportation system, ailway transportation has been extensively developed and expanded in the past few decades. It plays an important role in solving urban traffic congestion, reducing environmental pollution, and improving urban sustainability. With the advancement of science and technology, ailway transportation systems are constantly introducing new technologies and innovations to improve operating efficiency and passenger experience, save energy and reduce operating costs.