GFD563A101 3BHE046836R0101 ABB Excitation device control unit

Description

GFD563A101 3BHE046836R0101 ABB Excitation device control unit

[service contact information]

Tel: 18059884797 (WeChat with the same number)
QQ：3095989363
Email: sales@xiongbagk.cn
Address: Unit 2009, Chuangxiang Center, No.1733, Lvling Road, Siming District, Xiamen

① 24-hour email reply (12 hours);

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Reactive Power (VAR) Reactive power (VAR)

Definition: Many electrical equipment are based on the principle of electromagnetic induction work, such as transformers, motors, etc., they rely on the establishment of alternating magnetic field in order to carry out energy conversion and transfer, in order to establish alternating magnetic field and induction flux and the electric power required is called reactive power.

All electrical equipment with electromagnetic coils, to establish a magnetic field, it is necessary to consume reactive power. Without reactive power, the motor will not turn and the transformer cannot change voltage. So reactive power is by no means useless power.

Action: Under normal conditions, electrical equipment not only obtains active power from the generator, but also needs to obtain reactive power from the generator. If reactive power is in short supply in the power grid, the electrical equipment will not have enough reactive power to establish normal electromagnetic fields. Therefore, the electrical equipment cannot work at the rated condition, and the terminal voltage of the electrical equipment will decrease, which affects the normal operation of the electrical equipment.

The reactive power output of the generator is related to the excitation current.

What is excitation?

A DC magnetic field is required for the operation of the generator. The DC current that generates this field, called the excitation current, is supplied to the rotor windings of the synchronous generator.

What is an excitation system?

The whole supply of excitation current line and equipment device called excitation system.

■ The composition of the excitation system mainly includes

■ Excitation control unit

■ Excitation power unit

■ Power system stabilizer PSS

■ Limiting and protecting circuits

■ Power transmitter and load compensation

GFD563A101 3BHE046836R0101

GFD563A101 3BHE046836R0101

GFD563A101 3BHE046836R0101

GFD563A101 3BHE046836R0101

Excitation control unit

Including excitation regulator, forced excitation, forced demagnetization and demagnetization, it will automatically adjust the output of the power unit excitation current according to the running state of the generator, to meet the needs of the generator operation.

■ Excitation regulator: It feels the voltage, current or other parameters of the generator, and then exerts control effect on the excitation power unit, excitation regulation, maintain the generator terminal voltage within the given range.

Automatic mode: compare the actual terminal voltage of the generator with the automatic set value to control the terminal voltage.

Manual mode: Compare the actual excitation current of the generator with the manual value to control the excitation current (in case of PT failure).

Excitation power unit

It provides DC excitation current to the synchronous generator’s excitation windings to establish DC magnetic field.

■ According to the excitation power supply mode, excitation mode has the following several

● DC excitation system

● AC excitation system

Static excitation system

■ According to the supply of excitation current, divided into

● Separate excitation generator, a generator that obtains excitation current from other sources

● Self-excited generator, a generator that obtains excitation current from the generator itself

DC excitation system DC excitation

There are usually two exciters – the main exciter and the secondary exciter.

The secondary exciter supplies the excitation current of the DC exciter itself.

One of the oldest excitation systems, but limited by the installed capacity is small, the scope of application is gradually reduced.

Please contact Sunny sales@xiongbagk.cn for the best price.

➱ sales manager: Sunny
➱ email mailto: sales@xiongbagk.cn
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