What Is an Induction Generator?

Induction generator ^[1] is a type of motor that uses electromagnetic induction between stator and rotor to induce current in the rotor to achieve electromechanical energy conversion. Induction generators have the advantages of simple structure, firmness, small size, light weight, few auxiliary equipment, and convenient operation and maintenance. In particular, the independent operation of the induction generator makes it very practical for use in remote mountainous areas that are not covered by the grid or lack of power Towns and villages or as emergency backup power. The principle of induction generator was first proposed by Frenchman M. Mauyice Loblance in 1901, but its application is extremely limited compared to synchronous generator. Although the induction generator is rarely used in real life, its simple structure, sturdy and reliable, convenient maintenance, easy grid connection, and easy control make it suitable for the development and utilization of renewable energy (such as wind and water). And more and more optimistic about energy saving technology and energy saving projects. The research status, structure, working principle, main advantages and disadvantages, economics of application and application prospect are introduced in detail.

The principle of induction generator was first proposed by the Frenchman M. Mauyice Loblance in 1901, but its application is extremely limited compared to synchronous generators ^[2]

Induction generators are divided into horizontal and vertical ^[2]

Also called "asynchronous generator". An alternator using the air gap rotating magnetic field between the stator and the rotor to interact with the induced current in the rotor windings.

Economical application of asynchronous generators in power stations ^[5]

In recent years, in modern power systems, synchronous generators have dominated the world. Due to the need to develop renewable energy such as wind, hydropower and biogas, small-scale establishments in areas not covered by large power grids such as grasslands, pastures, islands, and remote mountain areas In power stations, induction generators have their unique uses, and solid rotor induction generators have obvious advantages ^[5] . In addition, in some urban and rural areas that lack electricity, many of the emergency small diesel (gas) oil generating units used after the power outage use induction generators. In many cases and in many cases, induction generators are superior to traditional small synchronous generators in many ways. With the development of industrial and agricultural production and national defense in recent years, the demand for various independent power sources has been increasing. In traditional generator sets, synchronous generators are generally used. However, due to the advantages of simple structure, low price, reliable operation, convenient maintenance and good dynamic performance, induction generators have attracted more and more attention, and have been successfully used in wind power, small hydropower and other systems. Advances in technology Induction generators will also be used in large hydroelectric generators, with promising applications.