PPD512 A10-15000 3BHE040375R1023 励磁系统控制器单元

PPD512 A10-15000 3BHE040375R1023 励磁系统控制器单元

励磁系统是同步发电机的稳定运行的重要组成部分,其主要任务是通过调节励磁绕组的电流来调节发电机转子电流电压来控制发电机机端电压,满足发电机正常发电的需要,同时控制发电机组间无功功率的合理分配,提高同步发电机并列运行的稳定性,可靠性。

同步发电机的励磁系统主要由功率单元和调节器（装置）两大部分组成。如下图所示

同步发电机的励磁系统重要组成

励磁系统主要任务

1.维持发电机机端电压在给定水平；

2.控制无功功率的分配；

3.提高同步发电机并联运行的稳定性；

4.提高电力系统继电保护装置动作准确性；

5.快速灭磁。

维持机端电压

在发电机正常运行情况下,励磁调节装置应维持发电机端电压或主变压器高压侧电压在给定水平。当发电机负荷变化时,要保证发电机的端电压为给定值则必须调节励磁。

PPD512 A10-15000 3BHE040375R1023 励磁系统控制器单元

Excitation system is an important part of the stable operation of synchronous generator, its main task is to control the generator terminal voltage by adjusting the current of the excitation winding to adjust the current and voltage of the generator rotor, to meet the needs of normal generator generation, and control the reasonable distribution of reactive power between the generator sets to improve the stability and reliability of synchronous generator parallel operation.

The excitation system of synchronous generator mainly consists of two parts: power unit and regulator (device). As shown in the following picture

The excitation system of synchronous generator is an important component

The main task of excitation system

1. Maintain the generator terminal voltage at a given level;

2. Control reactive power distribution;

3. Improve the stability of parallel operation of synchronous generator;

4. Improve the power system relay protection device operation accuracy;

5. Quickly disable the magnetic field.

Maintain the terminal voltage

Under the normal operation of the generator, the excitation regulation device shall maintain the generator terminal voltage or the high voltage side of the main transformer at a given level. When the generator load changes, the excitation must be adjusted to ensure that the generator terminal voltage is a given value.

PPD512 A10-15000 3BHE040375R1023 励磁系统控制器单元