KUC755AE105  ABB模块 中高压变频板

KUC755AE105  ABB模块 中高压变频板

同步发电机的励磁系统在稳态或暂态过程中;都直接影响着发电机的特性。优良的励磁系统不仅可以保证高质量的电能、发电机运行的可靠性和稳定性,而且可以有效地提高发电机及其相关的电力系统的技术经济指标。

同步发电机在投入电网运行之前要求其电压能维持在给定值即发电机空载运行条件下,其励磁控制系统必须稳定运行。当发电机并入电网以后就与电力系统史所有发电机组并联运行,因此要求发电机的励磁控制系统能对电力系统稳定运行产生有益的影响。如果在电力系统稳定计算中，如果忽略了励磁调节系统的作用则很难求得令人满意的结果。

除了稳定问题外,在运行中往往对励磁控制系统的动态性能指标和控制精度提出要求。电力系统设计规程对励磁控制系统的要求为:

稳定指标幅值裕星m > 30db ,相角裕量y>50°动态指标:超调量M。当〈15为~30为,调整时间t。<10 s;控制精度:稳态误差e ( oo)<1%~~2%;
 

KUC755AE105  ABB模块 中高压变频板

The excitation system of a synchronous generator is in a steady state or transient process; All directly affect the characteristics of the generator. Excellent excitation system can not only ensure the high quality of electric energy, the reliability and stability of the generator operation, but also effectively improve the technical and economic indicators of the generator and its related power system.

Before the synchronous generator is put into power grid operation, its voltage must be maintained at a given value, that is, under no-load operation condition, and its excitation control system must run stably. When the generator is integrated into the power grid, it runs in parallel with all the generators in the history of the power system, so the excitation control system of the generator is required to have a beneficial effect on the stable operation of the power system. In the stability calculation of power system, it is difficult to get a satisfactory result if the role of excitation regulating system is ignored.

In addition to stability problems, dynamic performance indexes and control accuracy of excitation control systems are often required in operation. The requirements for excitation control system in power system design regulations are:

Stability index amplitude margin star m > 30db, phase Angle margin y>50° Dynamic index: overshoot M. If the value is < 15 to 30, adjust the time t. <10 s; Control accuracy: steady state error e (oo)<1%~~2%;

KUC755AE105  ABB模块 中高压变频板