Purpose of diesel generator
2022-03-19
Application of generator electric energy is one of the most important energy sources in modern society. A generator is a mechanical device that converts other forms of energy into electrical energy. Generators are widely used in industrial and agricultural production, national defense, science and technology and daily life.
First, it is applied to large and medium-sized power plants to supply power for Industry and civil use. There are mainly thermal power stations, water conservancy power stations, nuclear power stations, wind power stations, solar power stations, etc. Second, small power stations. As backup power supply, mobile power supply or temporary power supply. Such as generator on board, generator for oil drilling; Service industries such as hospitals, hotels, banks, shopping malls, backup power supply and so on Areas far away from power supply equipment, such as the construction of highways, hospitals, high-end hotels, airports, flood control equipment and standby power supply for important places. Diesel generator sets are widely used in places where there is no fixed power supply and it is difficult to erect transmission lines. For example, field construction operation, zero hour power supply, building emergency power supply, industrial and mining auxiliary emergency power supply, etc. Many mechanical vehicles powered by electric drive also use diesel generator sets. Such as diesel locomotive, electric shovel, diesel electric submarine, ship power supply, etc. The mobile power station, automatic and low-noise diesel generator set developed and produced in recent years have the characteristics of sensitive response, low noise, compact structure and economical use. They are ideal backup power supply for trailer power station, engineering construction, geological exploration, industrial and mining enterprises, hotels, hotels and other places.
The application of solar generator can provide lighting for remote areas without electricity and meet the power needs of field workers. It is a necessary equipment for camping. It can provide night lighting and can replace part of the energy of the state grid or supplement energy. It is pollution-free, safe and sustainable use of new energy. The standby power supply mainly includes diesel generator, gas turbine generator, etc. There are many forms of generator, but its working principle is based on the law of electromagnetic induction and the law of electromagnetic force.
Therefore, the general principle of its structure is to use appropriate magnetic and conductive materials to form magnetic circuits and circuits for mutual electromagnetic induction, so as to generate electromagnetic power and achieve the purpose of energy conversion. The classification of generators can be summarized as follows: generators are divided into DC generators and AC generators; Alternator is divided into synchronous generator and asynchronous generator (rarely used). Alternator can also be divided into single-phase generator and three-phase generator. Generators are divided into DC generators and AC generators. The latter can be divided into synchronous generator and asynchronous generator. Synchronous generators are the most commonly used in modern power stations. This generator is characterized by DC current excitation, which can provide both active power and reactive power, and can meet the needs of various loads. Because there is no independent excitation winding, the asynchronous generator has simple structure and convenient operation, but it can not provide reactive power to the load, and it also needs to draw the lagging magnetization current from the connected power grid. Therefore, the asynchronous generator must be connected in parallel with other synchronous motors or a considerable number of capacitors. This limits the application scope of asynchronous generator, which can only be widely used in small automatic hydropower stations. DC power sources used in urban tram, electrolysis, electrochemistry and other industries mostly used DC generators before the 1950s. However, DC generator has commutator, which has complex structure, time-consuming manufacturing, expensive price, easy failure, difficult maintenance and lower efficiency than AC generator. Therefore, since the advent of high-power controllable rectifier, there is a trend of using AC power supply to obtain DC through semiconductor rectification to replace DC generator.
First, it is applied to large and medium-sized power plants to supply power for Industry and civil use. There are mainly thermal power stations, water conservancy power stations, nuclear power stations, wind power stations, solar power stations, etc. Second, small power stations. As backup power supply, mobile power supply or temporary power supply. Such as generator on board, generator for oil drilling; Service industries such as hospitals, hotels, banks, shopping malls, backup power supply and so on Areas far away from power supply equipment, such as the construction of highways, hospitals, high-end hotels, airports, flood control equipment and standby power supply for important places. Diesel generator sets are widely used in places where there is no fixed power supply and it is difficult to erect transmission lines. For example, field construction operation, zero hour power supply, building emergency power supply, industrial and mining auxiliary emergency power supply, etc. Many mechanical vehicles powered by electric drive also use diesel generator sets. Such as diesel locomotive, electric shovel, diesel electric submarine, ship power supply, etc. The mobile power station, automatic and low-noise diesel generator set developed and produced in recent years have the characteristics of sensitive response, low noise, compact structure and economical use. They are ideal backup power supply for trailer power station, engineering construction, geological exploration, industrial and mining enterprises, hotels, hotels and other places.
The application of solar generator can provide lighting for remote areas without electricity and meet the power needs of field workers. It is a necessary equipment for camping. It can provide night lighting and can replace part of the energy of the state grid or supplement energy. It is pollution-free, safe and sustainable use of new energy. The standby power supply mainly includes diesel generator, gas turbine generator, etc. There are many forms of generator, but its working principle is based on the law of electromagnetic induction and the law of electromagnetic force.
Therefore, the general principle of its structure is to use appropriate magnetic and conductive materials to form magnetic circuits and circuits for mutual electromagnetic induction, so as to generate electromagnetic power and achieve the purpose of energy conversion. The classification of generators can be summarized as follows: generators are divided into DC generators and AC generators; Alternator is divided into synchronous generator and asynchronous generator (rarely used). Alternator can also be divided into single-phase generator and three-phase generator. Generators are divided into DC generators and AC generators. The latter can be divided into synchronous generator and asynchronous generator. Synchronous generators are the most commonly used in modern power stations. This generator is characterized by DC current excitation, which can provide both active power and reactive power, and can meet the needs of various loads. Because there is no independent excitation winding, the asynchronous generator has simple structure and convenient operation, but it can not provide reactive power to the load, and it also needs to draw the lagging magnetization current from the connected power grid. Therefore, the asynchronous generator must be connected in parallel with other synchronous motors or a considerable number of capacitors. This limits the application scope of asynchronous generator, which can only be widely used in small automatic hydropower stations. DC power sources used in urban tram, electrolysis, electrochemistry and other industries mostly used DC generators before the 1950s. However, DC generator has commutator, which has complex structure, time-consuming manufacturing, expensive price, easy failure, difficult maintenance and lower efficiency than AC generator. Therefore, since the advent of high-power controllable rectifier, there is a trend of using AC power supply to obtain DC through semiconductor rectification to replace DC generator.