Thoughts on the power system and its automation

Electrical engineering and its automation major is a very good major, the current employment situation is particularly good, the main content is related to power plants, power transmission and transformation, power supply and factory power supply. It's not clear at once, if you're a man or a woman, if it's a girl, this major isn't very suitable for you.

Post-graduation employment direction.

Electricity-related businesses need it. The main destinations are: power plants, power supply companies, electrical equipment companies, etc., any industrial enterprise needs this specialty.

Power systems and their automation.

Business training objectives: to train senior engineering and technical personnel engaged in the design, operation, testing and research of power systems and their automation.

Business training requirements: Students in this major mainly learn the basic theory, basic knowledge and basic skills of the design and operation of power plants, power systems and their automation.

Graduates are expected to acquire the following knowledge and abilities:

1. Master the basic theories and basic knowledge of mathematics, circuits, electrical machinery, electronic technology foundation, microcomputer principles and automatic control necessary for the major, and master the basic skills of computer computing, experiments, engineering drawing, etc.;

2. Master the operation theory and design methods of power plants and power systems;

3. Master the power system relay protection, automatic control technology and related design and debugging methods;

4. Basic knowledge and basic ability of computer application in power system and power industry production, operation and management;

5. Understand the technological development trends in the professional field at home and abroad, and have the initial ability to conduct scientific research and new technology development.

Main disciplines: Electrical Engineering, Power System.

Main courses: Circuit, Electrical Engineering, Electronic Technology, Principles of Automatic Control, Principles and Applications of Microcomputers, Electrical Parts of Power Plants, Steady-State Analysis of Power Systems, Transient Analysis of Power Systems, Principles of Relay Protection of Power Systems, and Automation of Power Systems.

Main practical links: metalworking practice, mechanical drawing, electronic technology comprehensive experiment, power system power flow offline calculation, professional comprehensive experiment (dynamic model experiment), computer application and computer practice, production practice, curriculum design, graduation project.

Graduates can be engaged in power system dispatching and computer automation in the on-duty operation and laboratory of large and medium-sized hydropower and thermal power plants, research and design of power systems and laboratories of scientific research institutions, as well as scientific research and teaching in relevant research institutes, institutes and schools.

Degree awarded: Bachelor of Engineering.

Related majors: electrical appliances and control, electrical technology.

Before the 50s of the 20th century, the power system capacity was about several million kilowatts, and the single unit capacity did not exceed 100,000 kilowatts. For example, various relay protection of power grid and generator, critical safety device of steam turbine, safety valve of boiler, automatic adjustment of steam turbine speed and generator voltage, automatic synchronization device of grid connection, etc. In the 50s and 60s, the scale of the power system developed to tens of millions of kilowatts, with a single capacity of more than 200,000 kilowatts, and formed a regional network, which put forward new requirements in terms of system stability, economic dispatching and integrated automation.

In terms of automation in the factory, centralized control of machine, furnace and electric unit was adopted. The system began to install analog frequency modulation devices and economic power distribution devices based on offline calculations, and widely adopted telecontrol communication technology. Various new automatic devices such as transistor protection devices, thyristor excitation regulators, and electro-hydraulic governors have been popularized.

In the 70s and 80s, the real-time monitoring system of the power grid (SCADA) with a computer as the main body and a complete set of software and hardware with complete functions began to appear. Large-scale thermal power generating units of more than 200,000 kilowatts began to adopt real-time safety monitoring and closed-loop automatic start-stop control. Reservoir dispatching for hydroelectric power plants, monitoring of dams, and computer monitoring for integrated automation of power plants began to be promoted.

Microcomputers are widely used in various automatic adjustment devices and relay protection devices.

1) Discipline: The direction is facing the national positioning of power system and automation disciplines.

2) Wide range of majors: Majors involve not only high-voltage technology, network analysis, equipment operation and selection of power systems, but also relay protection of power systems. Automation.

Communication, integrated automation and other weak current automatic control.

The content of the content is to achieve the combination of strong and weak electricity, the combination of design and construction, the combination of control and operation and management. Emphasis is placed on the technical foundation and attention is paid to capacity building.

3) Strong adaptability and compatibility. On the premise of ensuring a solid foundation, it can be based on the market economy.

It is necessary to adjust and broaden its professional direction in thermal power, communication, electricity management and telecontrol to adapt to the changes in the society's demand for professional talents.

Power system automation, interaction, informatization is the direction of the future development of the power system, but also the key technology of smart grid realization, in recent years, China's smart grid construction has achieved fruitful results, carried out hundreds of smart grid pilot project construction, the pilot scope covers power generation, transmission, substation, distribution, electricity, dispatching 6 major links and communication information platform, and according to the maturity and application of the technology, has selected the smart grid dispatching system, distribution automation, 14 types of projects such as electricity information collection will be promoted and constructed. China Southern Power Grid Corporation has also built a smart grid technology research platform, and carried out the construction of a number of demonstration projects such as Hainan provincial power grid, Guangzhou Sino-Singapore Knowledge City smart distribution network, and Zhuhai Wanshan Island smart microgrid. In summary.

China has made the following outstanding achievements in the construction of smart grids.

1) A number of intelligent transmission and distribution technologies have been applied, which has improved the controllability and flexibility of the power grid, thereby improving the transmission capacity and safety and stability of the power grid. In December 2015, China's first unified power flow controller (UPFC) project - Nanjing 220kV West Ring Network UPFC project was officially put into operation. In December 2017, the 500kVUPFC project of Suzhou South Power Grid was officially put into operation.

In June 2016, China's first source-grid-load-friendly interactive precision load control system was put into operation in Jiangsu Power Grid, which can provide 3500MW second-level quasi-real-time control and 1000MW millisecond-level emergency control capabilities.

2) The smart grid dispatching technology support system has been comprehensively promoted and applied, which has comprehensively improved the safe operation level of the large power grid. The smart grid dispatching technical support system D5000 has been developed and successfully put into operation in 31 power grids at or above the provincial level, which has greatly improved the observability and controllability of the large power grid, and the collaborative operation of multiple dispatching centers and the ability of security early warning, power grid operation economy and new energy absorption capacity, as well as the ability of power grid dispatching to resist major natural disasters and group network attacks have been significantly enhanced.

3) The popularization and application of intelligent substations and distribution automation have been accelerated, which has significantly improved the interoperability of power grids. A large number of intelligent substations have been built and put into operation, realizing the digitization of information of the whole station, the networking of communication platforms, and the standardization of information sharing. The construction of distribution network automation systems in many urban core areas across the country has improved the intelligent operation level of the distribution network.

4) The construction and application exploration of the power grid big data platform have been carried out. Within the scope of the State Grid, the construction and promotion of the dispatching system D5000, WAMS, large-scale power information collection (AMI) system and other data acquisition systems, accumulated a large amount of power grid big data. On this basis, China Electric Power Research Institute and other units have carried out the construction and exploration of big data platforms in the technical field, such as data fusion in the field of regulation and control business and power distribution business based on the unified data model of SG.

In the field of application, the research work of big data mining and analysis has been initiated, such as the research and application of overload warning of distribution transformer based on big data.