What is the major of railway power supply technology?

Railway power supply technology majors study electrical engineering, PLC technology, frequency conversion control technology, etc.

1. Learn electrical engineering: The traditional broad definition of electrical engineering refers to the sum of related disciplines used to create and produce electrical and electronic systems. With the rapid development of science and technology, the concept of electrical engineering has gone far beyond the above definition. Professor Stanford University pointed out: "Today's electrical engineering covers almost all engineering behaviors related to electrons and photons".

The main courses are: circuit principle, analog electronic technology, digital electronic technology, microcomputer principle and application, signal and system, automatic control principle, motor and transmission, power electronics technology, electric drive automatic control system, electric control technology and PLC application, microcomputer control technology and power system analysis.

Electrical part of power plant, electrical engineering, automatic device principle of power system, electrotechnics, high voltage and insulation technology, electrical engineering English, steady state analysis of power system, transient analysis of power system, high voltage technology, high voltage DC transmission technology, relay protection.

2.PLC technology: PLC technology refers to the technology of programmable logic controller. It is a digital computer used in industrial automation control system, which is mainly used to monitor and control all kinds of electromechanical equipment in the production process. The main features of PLC technology include:

(1), programmability: PLC uses a specific programming language (such as ladder diagram, instruction list or structured text). ) to write control programs, so as to realize automatic control and logical processing of industrial processes.

(2) Easy to configure and modify: PLC system has programmability and modular design, which makes it relatively easy for users to configure, modify and expand control programs to meet different application requirements.

(3) Real-time: PLC system can monitor and respond to input signals in real time, and carry out corresponding output control according to preset logic and algorithm to ensure the accuracy and stability of industrial processes.

(4) Reliability: PLC system usually adopts industrial-grade software and hardware, which has high reliability and strong anti-interference ability and can run stably for a long time in harsh industrial environment.

(5) Network communication capability: Modern PLC systems support various communication interfaces and protocols, such as Ethernet, Modbus and Profibus, and can exchange and integrate data with other devices and systems.

3. Frequency conversion control technology: Frequency conversion technology is a conversion technology that converts direct current into alternating current with different frequencies. It can change alternating current into direct current and then into alternating current with different frequencies, and it can also change direct current into alternating current and then vice versa. In a word, all this is just a change of frequency, not a change of electric energy.

The advantages of frequency conversion technology include:

(1) remarkable energy-saving effect: by adjusting the speed of the motor, the inverter can provide the required output power according to the actual needs, thus achieving the purpose of energy saving. Especially in the case of partial load or low load, energy consumption can be significantly reduced.

(2) Improve production efficiency: Frequency conversion technology can accurately control the motor speed to adapt to different technological requirements and production conditions. This is helpful to improve the operation efficiency and product quality of the production line.

(3) Reduce equipment damage and maintenance costs: Through accurate control, the inverter can reduce the start-stop impact of the motor and related equipment and prolong the service life of the equipment. In addition, due to the low peak current when the motor is started, the influence of the power grid on the equipment can be reduced.

(4) Provide flexibility and versatility: Frequency conversion technology can adjust the speed and operating characteristics of the motor as needed to meet the requirements of different working conditions. Its programmable characteristics enable the inverter to realize many functions, such as overload protection, fault diagnosis and remote monitoring.

Present situation and trend of railway electrification development

Railway electrification refers to the use of electricity instead of traditional fuel power in the railway system to improve the efficiency and safety of railway transportation. With the continuous development of science and technology and social progress, railway electrification has become the mainstream trend of railway transportation. This paper will discuss the development of railway electrification from two aspects: current situation and trend.

First, the status quo

China railway electrification construction has made remarkable achievements. By the end of 2020, the railway electrification mileage in China has reached146,000 km, accounting for 7 1.4% of the total railway mileage in China. Among them, the electrification rate of high-speed railway has reached 100%. The development of railway electrification not only improves the efficiency and safety of railway transportation, but also reduces the pollution to the environment, making contributions to the sustainable development of economy and society.

Second, the trend:

1, high speed: With the continuous development of high-speed railway, railway electrification will pay more attention to high speed. High-speed railway electrification system needs high reliability and stability to ensure the safe and stable operation of high-speed trains.

2. Intelligence: With the continuous development of artificial intelligence and Internet of Things technology, railway electrification will pay more attention to intelligence. Intelligent electrification system can realize automatic control and remote monitoring, and improve the efficiency and safety of railway transportation.

3. Greening: With the continuous improvement of environmental awareness, railway electrification will pay more attention to greening. Green electrification system can use renewable energy such as solar energy and wind energy to reduce environmental pollution and contribute to the sustainable development of economy and society.

4. Internationalization: With the continuous promotion of the Belt and Road, railway electrification will pay more attention to internationalization. International electrification system needs international standards and technologies to meet the needs of international railway transportation.