PPD513 A24-110110 ABB AC800PEC Static excitation system

Description

Technical Description PPD513 A24-110110:

excitation
In general, we use the principle of electromagnetic induction to make the generator rotor form a rotating magnetic field process called excitation. In addition, to provide a working magnetic field for generators and other “electrical equipment that works on the principle of electromagnetic induction” is also called excitation. Sometimes, the device that provides rotor power to the rotor of a generator is also called excitation.
With the development of electric power construction, China’s electric power system industry has entered the stage of large network, high voltage and large unit. The stability of large capacity units during operation is very important to the stability and security of the whole power grid. However, it is the motor excitation system that affects the stability of the generator the most. Excitation system plays a very important role in the security of power grid. It is not only the guarantee of stable operation of the unit, but also the lever of reactive power and voltage regulation in the whole power grid.

Main function
1, maintain the generator terminal voltage at the given value, when the generator load changes, by adjusting the strength of the magnetic field to keep the terminal voltage.
Schematic diagram of convex pole rotor structure
2. Reasonable distribution of reactive power between parallel operating units.
2. Improve the stability of power system, including static stability, transient stability and dynamic stability.
composition
The excitation system of synchronization dynamo mainly consists of two parts: power unit and regulator. The excitation power unit is the part of the excitation power supply which provides DC excitation current to the rotor winding of synchronous generator, and the excitation regulator is the device which controls the output of the excitation power unit according to the input signal required by the control and the given regulation criteria. The whole system composed of excitation regulator, excitation power unit and generator itself is called excitation system control system. Excitation system is an important part of generator, it has great influence on the safe and stable operation of power system and generator itself. [2]

Direct current classification
The excitation mode of DC motor can be divided into four categories: separate excitation, parallel excitation, series excitation and compound excitation.

Classification of rectification
1. Rotary excitation
Rotary excitation also includes DC AC and brushless excitation.
2. Static excitation
Static exciter includes potential source static exciter and compound source static exciter.
Excitation motor
Ac power supply according to generator excitation
1. Ac excitation system
It is powered by an AC exciter coaxial with the generator. The system can be divided into four ways:
1) AC exciter (magnetic field rotation) and stationary silicon rectifier (brush).
2) AC exciter (magnetic field rotation) and static SCR rectifier (brush).
3) AC exciter (armature rotation) and silicon rectifier (brushless).
4) AC exciter (armature rotation) and SCR rectifier (brushless)..

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PPD513 A24-110110

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