MTS30M4-38C SEM module 模块控制器C5-A30 DC220V

MTS30M4-38C SEM module 模块控制器C5-A30 DC220V

1、电压调节

　　自动调节励磁系统可以看成为一个以电压为被调量的负反馈控制系统。无功负荷电流是造成发电机端电压下降的主要原因，当励磁电流不变时，发电机的端电压将随无功电流的增大而降低。但是为了满足用户对电能质量的要求，发电机的端电压应基本保持不变，实现这一要求的办法是随无功电流的变化调节发电机的励磁电流。

　　2、无功功率

　　发电机与系统并联运行时，可以认为是与无限大容量电源的母线运行，要改变发电机励磁电流，感应电势和定子电流也跟着变化，此时发电机的无功电流也跟着变化。当发电机与无限大容量系统并联运行时，为了改变发电机的无功功率，必须调节发电机的励磁电流。此时改变的发电机励磁电流并不是通常所说的“调压”，而是只是改变了送入系统的无功功率。

1, voltage regulation

The automatic regulating excitation system can be regarded as a negative feedback control system with voltage as the regulated quantity. The reactive load current is the main reason for the drop of generator terminal voltage. When the excitation current is constant, the generator terminal voltage will decrease with the increase of reactive current. However, in order to meet the requirements of users on power quality, the terminal voltage of the generator should remain basically unchanged, and the way to achieve this requirement is to adjust the excitation current of the generator with the change of reactive current.

2. Reactive power

When the generator runs in parallel with the system, it can be considered as running with the bus bar of the infinite capacity power supply. To change the excitation current of the generator, the induced potential and stator current also change, and the reactive current of the generator also changes. When the generator runs in parallel with the infinite capacity system, the excitation current of the generator must be adjusted in order to change the reactive power of the generator. At this time, the changed generator excitation current is not what is usually called "voltage regulation", but only changes the reactive power fed into the system.